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kumaneko |
2863 |
/* |
2 |
kumaneko |
2864 |
* security/ccsecurity/policy_io.c |
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kumaneko |
2863 |
* |
4 |
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* Copyright (C) 2005-2009 NTT DATA CORPORATION |
5 |
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* |
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kumaneko |
2869 |
* Version: 1.7.0-pre 2009/08/08 |
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kumaneko |
2863 |
* |
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* This file is applicable to both 2.4.30 and 2.6.11 and later. |
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* See README.ccs for ChangeLog. |
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* |
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*/ |
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#include "internal.h" |
14 |
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/* Lock for protecting ccs_profile->comment */ |
16 |
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static DEFINE_SPINLOCK(ccs_profile_comment_lock); |
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static bool ccs_profile_entry_used[CCS_MAX_CONTROL_INDEX + |
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CCS_MAX_CAPABILITY_INDEX + 1]; |
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/* String table for functionality that takes 4 modes. */ |
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static const char *ccs_mode_4[4] = { |
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"disabled", "learning", "permissive", "enforcing" |
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}; |
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/* String table for functionality that takes 2 modes. */ |
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static const char *ccs_mode_2[4] = { |
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"disabled", "enabled", "enabled", "enabled" |
28 |
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}; |
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/* Table for profile. */ |
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static struct { |
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const char *keyword; |
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unsigned int current_value; |
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const unsigned int max_value; |
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} ccs_control_array[CCS_MAX_CONTROL_INDEX] = { |
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[CCS_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 }, |
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kumaneko |
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[CCS_AUTOLEARN_EXEC_REALPATH] = { "AUTOLEARN_EXEC_REALPATH", 0, 1 }, |
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[CCS_AUTOLEARN_EXEC_ARGV0] = { "AUTOLEARN_EXEC_ARGV0", 0, 1 }, |
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kumaneko |
2863 |
[CCS_MAC_FOR_IOCTL] = { "MAC_FOR_IOCTL", 0, 3 }, |
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kumaneko |
2871 |
[CCS_MAC_FOR_FILEATTR] = { "MAC_FOR_FILEATTR", 0, 3 }, |
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kumaneko |
2863 |
[CCS_MAC_FOR_ENV] = { "MAC_FOR_ENV", 0, 3 }, |
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[CCS_MAC_FOR_NETWORK] = { "MAC_FOR_NETWORK", 0, 3 }, |
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[CCS_MAC_FOR_SIGNAL] = { "MAC_FOR_SIGNAL", 0, 3 }, |
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[CCS_MAC_FOR_NAMESPACE] = { "MAC_FOR_NAMESPACE", 0, 3 }, |
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[CCS_RESTRICT_AUTOBIND] = { "RESTRICT_AUTOBIND", 0, 1 }, |
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[CCS_MAX_ACCEPT_ENTRY] |
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= { "MAX_ACCEPT_ENTRY", CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY, INT_MAX }, |
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#ifdef CONFIG_CCSECURITY_AUDIT |
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[CCS_MAX_GRANT_LOG] |
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= { "MAX_GRANT_LOG", CONFIG_CCSECURITY_MAX_GRANT_LOG, INT_MAX }, |
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[CCS_MAX_REJECT_LOG] |
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= { "MAX_REJECT_LOG", CONFIG_CCSECURITY_MAX_REJECT_LOG, INT_MAX }, |
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#endif |
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[CCS_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 }, |
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[CCS_SLEEP_PERIOD] |
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= { "SLEEP_PERIOD", 0, 3000 }, /* in 0.1 second */ |
57 |
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}; |
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59 |
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/* Permit policy management by non-root user? */ |
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static bool ccs_manage_by_non_root; |
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62 |
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/** |
63 |
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* ccs_quiet_setup - Set CCS_VERBOSE=0 by default. |
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* |
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* @str: Unused. |
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* |
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* Returns 0. |
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*/ |
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static int __init ccs_quiet_setup(char *str) |
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{ |
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ccs_control_array[CCS_VERBOSE].current_value = 0; |
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return 0; |
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} |
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__setup("CCS_QUIET", ccs_quiet_setup); |
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/** |
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* ccs_io_printf - Transactional printf() to "struct ccs_io_buffer" structure. |
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* |
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* @head: Pointer to "struct ccs_io_buffer". |
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* @fmt: The printf()'s format string, followed by parameters. |
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* |
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* Returns true on success, false otherwise. |
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* |
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* The snprintf() will truncate, but ccs_io_printf() won't. |
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*/ |
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bool ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
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{ |
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va_list args; |
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int len; |
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int pos = head->read_avail; |
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int size = head->readbuf_size - pos; |
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if (size <= 0) |
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return false; |
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va_start(args, fmt); |
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len = vsnprintf(head->read_buf + pos, size, fmt, args); |
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va_end(args); |
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if (pos + len >= head->readbuf_size) |
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return false; |
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head->read_avail += len; |
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return true; |
102 |
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} |
103 |
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104 |
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/** |
105 |
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* ccs_find_or_assign_new_profile - Create a new profile. |
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* |
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* @profile: Profile number to create. |
108 |
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* |
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* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
110 |
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*/ |
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kumaneko |
2892 |
static struct ccs_profile *ccs_find_or_assign_new_profile(const unsigned int |
112 |
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profile) |
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kumaneko |
2863 |
{ |
114 |
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struct ccs_profile *ptr; |
115 |
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struct ccs_profile *entry; |
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int i; |
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kumaneko |
2892 |
if (profile >= CCS_MAX_PROFILES) |
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kumaneko |
2863 |
return NULL; |
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ptr = ccs_profile_ptr[profile]; |
120 |
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if (ptr) |
121 |
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return ptr; |
122 |
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entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
123 |
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mutex_lock(&ccs_policy_lock); |
124 |
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ptr = ccs_profile_ptr[profile]; |
125 |
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if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
126 |
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ptr = entry; |
127 |
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for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) |
128 |
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ptr->value[i] = ccs_control_array[i].current_value; |
129 |
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/* |
130 |
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* Needn't to initialize "ptr->capability_value" |
131 |
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* because they are always 0. |
132 |
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*/ |
133 |
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mb(); /* Avoid out-of-order execution. */ |
134 |
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ccs_profile_ptr[profile] = ptr; |
135 |
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entry = NULL; |
136 |
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} |
137 |
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mutex_unlock(&ccs_policy_lock); |
138 |
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kfree(entry); |
139 |
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return ptr; |
140 |
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} |
141 |
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142 |
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/** |
143 |
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* ccs_write_profile - Write profile table. |
144 |
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* |
145 |
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* @head: Pointer to "struct ccs_io_buffer". |
146 |
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* |
147 |
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* Returns 0 on success, negative value otherwise. |
148 |
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*/ |
149 |
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static int ccs_write_profile(struct ccs_io_buffer *head) |
150 |
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{ |
151 |
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char *data = head->write_buf; |
152 |
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unsigned int i; |
153 |
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unsigned int value; |
154 |
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char *cp; |
155 |
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struct ccs_profile *ccs_profile; |
156 |
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i = simple_strtoul(data, &cp, 10); |
157 |
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if (data != cp) { |
158 |
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if (*cp != '-') |
159 |
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return -EINVAL; |
160 |
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data = cp + 1; |
161 |
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} |
162 |
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ccs_profile = ccs_find_or_assign_new_profile(i); |
163 |
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if (!ccs_profile) |
164 |
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return -EINVAL; |
165 |
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cp = strchr(data, '='); |
166 |
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if (!cp) |
167 |
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return -EINVAL; |
168 |
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*cp = '\0'; |
169 |
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if (!strcmp(data, "COMMENT")) { |
170 |
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const struct ccs_path_info *new_comment |
171 |
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= ccs_get_name(cp + 1); |
172 |
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const struct ccs_path_info *old_comment; |
173 |
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/* Protect reader from ccs_put_name(). */ |
174 |
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/***** CRITICAL SECTION START *****/ |
175 |
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spin_lock(&ccs_profile_comment_lock); |
176 |
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old_comment = ccs_profile->comment; |
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ccs_profile->comment = new_comment; |
178 |
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spin_unlock(&ccs_profile_comment_lock); |
179 |
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/***** CRITICAL SECTION END *****/ |
180 |
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ccs_put_name(old_comment); |
181 |
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ccs_profile_entry_used[0] = true; |
182 |
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return 0; |
183 |
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} |
184 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_MAC_FOR_CAPABILITY)) { |
185 |
kumaneko |
2863 |
if (sscanf(cp + 1, "%u", &value) != 1) { |
186 |
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for (i = 0; i < 4; i++) { |
187 |
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if (strcmp(cp + 1, ccs_mode_4[i])) |
188 |
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continue; |
189 |
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value = i; |
190 |
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break; |
191 |
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} |
192 |
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if (i == 4) |
193 |
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return -EINVAL; |
194 |
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} |
195 |
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if (value > 3) |
196 |
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value = 3; |
197 |
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for (i = 0; i < CCS_MAX_CAPABILITY_INDEX; i++) { |
198 |
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if (strcmp(data, ccs_capability_control_keyword[i])) |
199 |
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continue; |
200 |
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ccs_profile->capability_value[i] = value; |
201 |
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ccs_profile_entry_used[i + 1 + CCS_MAX_CONTROL_INDEX] |
202 |
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= true; |
203 |
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return 0; |
204 |
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} |
205 |
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return -EINVAL; |
206 |
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} |
207 |
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for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) { |
208 |
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if (strcmp(data, ccs_control_array[i].keyword)) |
209 |
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continue; |
210 |
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if (sscanf(cp + 1, "%u", &value) != 1) { |
211 |
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int j; |
212 |
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const char **modes; |
213 |
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switch (i) { |
214 |
kumaneko |
2893 |
case CCS_AUTOLEARN_EXEC_REALPATH: |
215 |
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case CCS_AUTOLEARN_EXEC_ARGV0: |
216 |
kumaneko |
2863 |
case CCS_RESTRICT_AUTOBIND: |
217 |
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case CCS_VERBOSE: |
218 |
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modes = ccs_mode_2; |
219 |
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break; |
220 |
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default: |
221 |
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modes = ccs_mode_4; |
222 |
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break; |
223 |
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} |
224 |
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for (j = 0; j < 4; j++) { |
225 |
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if (strcmp(cp + 1, modes[j])) |
226 |
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continue; |
227 |
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value = j; |
228 |
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break; |
229 |
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} |
230 |
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if (j == 4) |
231 |
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return -EINVAL; |
232 |
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} else if (value > ccs_control_array[i].max_value) { |
233 |
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value = ccs_control_array[i].max_value; |
234 |
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} |
235 |
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ccs_profile->value[i] = value; |
236 |
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ccs_profile_entry_used[i + 1] = true; |
237 |
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return 0; |
238 |
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} |
239 |
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return -EINVAL; |
240 |
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} |
241 |
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242 |
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/** |
243 |
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* ccs_read_profile - Read profile table. |
244 |
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* |
245 |
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* @head: Pointer to "struct ccs_io_buffer". |
246 |
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* |
247 |
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* Returns 0. |
248 |
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*/ |
249 |
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static int ccs_read_profile(struct ccs_io_buffer *head) |
250 |
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{ |
251 |
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static const int ccs_total |
252 |
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= CCS_MAX_CONTROL_INDEX + CCS_MAX_CAPABILITY_INDEX + 1; |
253 |
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int step; |
254 |
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if (head->read_eof) |
255 |
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return 0; |
256 |
kumaneko |
2892 |
for (step = head->read_step; step < CCS_MAX_PROFILES * ccs_total; |
257 |
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step++) { |
258 |
kumaneko |
2863 |
const u8 index = step / ccs_total; |
259 |
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u8 type = step % ccs_total; |
260 |
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const struct ccs_profile *ccs_profile = ccs_profile_ptr[index]; |
261 |
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head->read_step = step; |
262 |
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if (!ccs_profile) |
263 |
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continue; |
264 |
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if (!ccs_profile_entry_used[type]) |
265 |
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continue; |
266 |
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if (!type) { /* Print profile' comment tag. */ |
267 |
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bool done; |
268 |
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/***** CRITICAL SECTION START *****/ |
269 |
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spin_lock(&ccs_profile_comment_lock); |
270 |
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done = ccs_io_printf(head, "%u-COMMENT=%s\n", |
271 |
|
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index, ccs_profile->comment ? |
272 |
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ccs_profile->comment->name : ""); |
273 |
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spin_unlock(&ccs_profile_comment_lock); |
274 |
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/***** CRITICAL SECTION END *****/ |
275 |
|
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if (!done) |
276 |
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break; |
277 |
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continue; |
278 |
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} |
279 |
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type--; |
280 |
|
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if (type >= CCS_MAX_CONTROL_INDEX) { |
281 |
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const int i = type - CCS_MAX_CONTROL_INDEX; |
282 |
|
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const u8 value = ccs_profile->capability_value[i]; |
283 |
|
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if (!ccs_io_printf(head, |
284 |
kumaneko |
2892 |
"%u-" CCS_KEYWORD_MAC_FOR_CAPABILITY |
285 |
kumaneko |
2863 |
"%s=%s\n", index, |
286 |
|
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ccs_capability_control_keyword[i], |
287 |
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ccs_mode_4[value])) |
288 |
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break; |
289 |
|
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} else { |
290 |
|
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const unsigned int value = ccs_profile->value[type]; |
291 |
|
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const char **modes = NULL; |
292 |
|
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const char *keyword = ccs_control_array[type].keyword; |
293 |
|
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switch (ccs_control_array[type].max_value) { |
294 |
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case 3: |
295 |
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modes = ccs_mode_4; |
296 |
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break; |
297 |
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case 1: |
298 |
|
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modes = ccs_mode_2; |
299 |
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break; |
300 |
|
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} |
301 |
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if (modes) { |
302 |
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if (!ccs_io_printf(head, "%u-%s=%s\n", index, |
303 |
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keyword, modes[value])) |
304 |
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break; |
305 |
|
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} else { |
306 |
|
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if (!ccs_io_printf(head, "%u-%s=%u\n", index, |
307 |
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keyword, value)) |
308 |
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break; |
309 |
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} |
310 |
|
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} |
311 |
|
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} |
312 |
kumaneko |
2892 |
if (step == CCS_MAX_PROFILES * ccs_total) |
313 |
kumaneko |
2863 |
head->read_eof = true; |
314 |
|
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return 0; |
315 |
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} |
316 |
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|
317 |
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/* The list for "struct ccs_policy_manager_entry". */ |
318 |
|
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LIST_HEAD(ccs_policy_manager_list); |
319 |
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|
320 |
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/** |
321 |
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* ccs_update_manager_entry - Add a manager entry. |
322 |
|
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* |
323 |
|
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* @manager: The path to manager or the domainnamme. |
324 |
|
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* @is_delete: True if it is a delete request. |
325 |
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* |
326 |
|
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* Returns 0 on success, negative value otherwise. |
327 |
|
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*/ |
328 |
|
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static int ccs_update_manager_entry(const char *manager, const bool is_delete) |
329 |
|
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{ |
330 |
|
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struct ccs_policy_manager_entry *entry = NULL; |
331 |
|
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struct ccs_policy_manager_entry *ptr; |
332 |
kumaneko |
2900 |
struct ccs_policy_manager_entry e = { }; |
333 |
kumaneko |
2863 |
int error = is_delete ? -ENOENT : -ENOMEM; |
334 |
|
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if (ccs_is_domain_def(manager)) { |
335 |
|
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if (!ccs_is_correct_domain(manager)) |
336 |
|
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return -EINVAL; |
337 |
kumaneko |
2900 |
e.is_domain = true; |
338 |
kumaneko |
2863 |
} else { |
339 |
|
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if (!ccs_is_correct_path(manager, 1, -1, -1)) |
340 |
|
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return -EINVAL; |
341 |
|
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} |
342 |
kumaneko |
2900 |
e.manager = ccs_get_name(manager); |
343 |
|
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if (!e.manager) |
344 |
kumaneko |
2863 |
return -ENOMEM; |
345 |
|
|
if (!is_delete) |
346 |
kumaneko |
2900 |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
347 |
kumaneko |
2863 |
mutex_lock(&ccs_policy_lock); |
348 |
|
|
list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
349 |
kumaneko |
2900 |
if (ptr->manager != e.manager) |
350 |
kumaneko |
2863 |
continue; |
351 |
|
|
ptr->is_deleted = is_delete; |
352 |
|
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error = 0; |
353 |
|
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break; |
354 |
|
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} |
355 |
kumaneko |
2900 |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
356 |
kumaneko |
2863 |
list_add_tail_rcu(&entry->list, &ccs_policy_manager_list); |
357 |
|
|
entry = NULL; |
358 |
|
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error = 0; |
359 |
|
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} |
360 |
|
|
mutex_unlock(&ccs_policy_lock); |
361 |
kumaneko |
2900 |
ccs_put_name(e.manager); |
362 |
kumaneko |
2863 |
kfree(entry); |
363 |
|
|
return error; |
364 |
|
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} |
365 |
|
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|
366 |
|
|
/** |
367 |
|
|
* ccs_write_manager_policy - Write manager policy. |
368 |
|
|
* |
369 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
370 |
|
|
* |
371 |
|
|
* Returns 0 on success, negative value otherwise. |
372 |
|
|
*/ |
373 |
|
|
static int ccs_write_manager_policy(struct ccs_io_buffer *head) |
374 |
|
|
{ |
375 |
|
|
char *data = head->write_buf; |
376 |
kumaneko |
2892 |
bool is_delete = ccs_str_starts(&data, CCS_KEYWORD_DELETE); |
377 |
kumaneko |
2863 |
if (!strcmp(data, "manage_by_non_root")) { |
378 |
|
|
ccs_manage_by_non_root = !is_delete; |
379 |
|
|
return 0; |
380 |
|
|
} |
381 |
|
|
return ccs_update_manager_entry(data, is_delete); |
382 |
|
|
} |
383 |
|
|
|
384 |
|
|
/** |
385 |
|
|
* ccs_read_manager_policy - Read manager policy. |
386 |
|
|
* |
387 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
388 |
|
|
* |
389 |
|
|
* Returns 0. |
390 |
|
|
* |
391 |
|
|
* Caller holds ccs_read_lock(). |
392 |
|
|
*/ |
393 |
|
|
static int ccs_read_manager_policy(struct ccs_io_buffer *head) |
394 |
|
|
{ |
395 |
|
|
struct list_head *pos; |
396 |
|
|
ccs_check_read_lock(); |
397 |
|
|
if (head->read_eof) |
398 |
|
|
return 0; |
399 |
|
|
list_for_each_cookie(pos, head->read_var2, &ccs_policy_manager_list) { |
400 |
|
|
struct ccs_policy_manager_entry *ptr; |
401 |
|
|
ptr = list_entry(pos, struct ccs_policy_manager_entry, list); |
402 |
|
|
if (ptr->is_deleted) |
403 |
|
|
continue; |
404 |
|
|
if (!ccs_io_printf(head, "%s\n", ptr->manager->name)) |
405 |
|
|
return 0; |
406 |
|
|
} |
407 |
|
|
head->read_eof = true; |
408 |
|
|
return 0; |
409 |
|
|
} |
410 |
|
|
|
411 |
|
|
/** |
412 |
|
|
* ccs_is_policy_manager - Check whether the current process is a policy manager. |
413 |
|
|
* |
414 |
|
|
* Returns true if the current process is permitted to modify policy |
415 |
|
|
* via /proc/ccs/ interface. |
416 |
|
|
* |
417 |
|
|
* Caller holds ccs_read_lock(). |
418 |
|
|
*/ |
419 |
|
|
static bool ccs_is_policy_manager(void) |
420 |
|
|
{ |
421 |
|
|
struct ccs_policy_manager_entry *ptr; |
422 |
|
|
const char *exe; |
423 |
|
|
struct task_struct *task = current; |
424 |
|
|
const struct ccs_path_info *domainname |
425 |
|
|
= ccs_current_domain()->domainname; |
426 |
|
|
bool found = false; |
427 |
|
|
ccs_check_read_lock(); |
428 |
|
|
if (!ccs_policy_loaded) |
429 |
|
|
return true; |
430 |
|
|
if (task->ccs_flags & CCS_TASK_IS_POLICY_MANAGER) |
431 |
|
|
return true; |
432 |
|
|
if (!ccs_manage_by_non_root && (current_uid() || current_euid())) |
433 |
|
|
return false; |
434 |
|
|
list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
435 |
|
|
if (!ptr->is_deleted && ptr->is_domain |
436 |
|
|
&& !ccs_pathcmp(domainname, ptr->manager)) { |
437 |
|
|
/* Set manager flag. */ |
438 |
|
|
task->ccs_flags |= CCS_TASK_IS_POLICY_MANAGER; |
439 |
|
|
return true; |
440 |
|
|
} |
441 |
|
|
} |
442 |
|
|
exe = ccs_get_exe(); |
443 |
|
|
if (!exe) |
444 |
|
|
return false; |
445 |
|
|
list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
446 |
|
|
if (!ptr->is_deleted && !ptr->is_domain |
447 |
|
|
&& !strcmp(exe, ptr->manager->name)) { |
448 |
|
|
found = true; |
449 |
|
|
/* Set manager flag. */ |
450 |
|
|
task->ccs_flags |= CCS_TASK_IS_POLICY_MANAGER; |
451 |
|
|
break; |
452 |
|
|
} |
453 |
|
|
} |
454 |
|
|
if (!found) { /* Reduce error messages. */ |
455 |
|
|
static pid_t ccs_last_pid; |
456 |
|
|
const pid_t pid = current->pid; |
457 |
|
|
if (ccs_last_pid != pid) { |
458 |
|
|
printk(KERN_WARNING "%s ( %s ) is not permitted to " |
459 |
|
|
"update policies.\n", domainname->name, exe); |
460 |
|
|
ccs_last_pid = pid; |
461 |
|
|
} |
462 |
|
|
} |
463 |
|
|
kfree(exe); |
464 |
|
|
return found; |
465 |
|
|
} |
466 |
|
|
|
467 |
|
|
/** |
468 |
|
|
* ccs_find_condition_part - Find condition part from the statement. |
469 |
|
|
* |
470 |
|
|
* @data: String to parse. |
471 |
|
|
* |
472 |
|
|
* Returns pointer to the condition part if it was found in the statement, |
473 |
|
|
* NULL otherwise. |
474 |
|
|
*/ |
475 |
|
|
static char *ccs_find_condition_part(char *data) |
476 |
|
|
{ |
477 |
|
|
char *cp = strstr(data, " if "); |
478 |
|
|
if (cp) { |
479 |
|
|
while (1) { |
480 |
|
|
char *cp2 = strstr(cp + 3, " if "); |
481 |
|
|
if (!cp2) |
482 |
|
|
break; |
483 |
|
|
cp = cp2; |
484 |
|
|
} |
485 |
|
|
*cp++ = '\0'; |
486 |
|
|
} else { |
487 |
|
|
cp = strstr(data, " ; set "); |
488 |
|
|
if (cp) |
489 |
|
|
*cp++ = '\0'; |
490 |
|
|
} |
491 |
|
|
return cp; |
492 |
|
|
} |
493 |
|
|
|
494 |
|
|
/** |
495 |
|
|
* ccs_is_select_one - Parse select command. |
496 |
|
|
* |
497 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
498 |
|
|
* @data: String to parse. |
499 |
|
|
* |
500 |
|
|
* Returns true on success, false otherwise. |
501 |
|
|
* |
502 |
|
|
* Caller holds ccs_read_lock(). |
503 |
|
|
*/ |
504 |
|
|
static bool ccs_is_select_one(struct ccs_io_buffer *head, const char *data) |
505 |
|
|
{ |
506 |
|
|
unsigned int pid; |
507 |
|
|
struct ccs_domain_info *domain = NULL; |
508 |
|
|
ccs_check_read_lock(); |
509 |
|
|
if (!strcmp(data, "allow_execute")) { |
510 |
|
|
head->read_execute_only = true; |
511 |
|
|
return true; |
512 |
|
|
} |
513 |
|
|
if (sscanf(data, "pid=%u", &pid) == 1) { |
514 |
|
|
struct task_struct *p; |
515 |
|
|
/***** CRITICAL SECTION START *****/ |
516 |
|
|
read_lock(&tasklist_lock); |
517 |
|
|
p = find_task_by_pid(pid); |
518 |
|
|
if (p) |
519 |
|
|
domain = ccs_task_domain(p); |
520 |
|
|
read_unlock(&tasklist_lock); |
521 |
|
|
/***** CRITICAL SECTION END *****/ |
522 |
|
|
} else if (!strncmp(data, "domain=", 7)) { |
523 |
|
|
if (ccs_is_domain_def(data + 7)) |
524 |
|
|
domain = ccs_find_domain(data + 7); |
525 |
|
|
} else |
526 |
|
|
return false; |
527 |
|
|
head->write_var1 = domain; |
528 |
|
|
/* Accessing read_buf is safe because head->io_sem is held. */ |
529 |
|
|
if (!head->read_buf) |
530 |
|
|
return true; /* Do nothing if open(O_WRONLY). */ |
531 |
|
|
head->read_avail = 0; |
532 |
|
|
ccs_io_printf(head, "# select %s\n", data); |
533 |
|
|
head->read_single_domain = true; |
534 |
|
|
head->read_eof = !domain; |
535 |
|
|
if (domain) { |
536 |
|
|
struct ccs_domain_info *d; |
537 |
|
|
head->read_var1 = NULL; |
538 |
|
|
list_for_each_entry_rcu(d, &ccs_domain_list, list) { |
539 |
|
|
if (d == domain) |
540 |
|
|
break; |
541 |
|
|
head->read_var1 = &d->list; |
542 |
|
|
} |
543 |
|
|
head->read_var2 = NULL; |
544 |
|
|
head->read_bit = 0; |
545 |
|
|
head->read_step = 0; |
546 |
|
|
if (domain->is_deleted) |
547 |
|
|
ccs_io_printf(head, "# This is a deleted domain.\n"); |
548 |
|
|
} |
549 |
|
|
return true; |
550 |
|
|
} |
551 |
|
|
|
552 |
kumaneko |
2897 |
static int ccs_write_domain_policy2(char *data, struct ccs_domain_info *domain, |
553 |
|
|
struct ccs_condition *cond, |
554 |
|
|
const bool is_delete) |
555 |
|
|
{ |
556 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_CAPABILITY)) |
557 |
|
|
return ccs_write_capability_policy(data, domain, cond, |
558 |
|
|
is_delete); |
559 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_NETWORK)) |
560 |
|
|
return ccs_write_network_policy(data, domain, cond, is_delete); |
561 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_SIGNAL)) |
562 |
|
|
return ccs_write_signal_policy(data, domain, cond, is_delete); |
563 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_ENV)) |
564 |
|
|
return ccs_write_env_policy(data, domain, cond, is_delete); |
565 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_MOUNT)) |
566 |
|
|
return ccs_write_mount_policy(data, domain, cond, is_delete); |
567 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_UNMOUNT)) |
568 |
|
|
return ccs_write_umount_policy(data, domain, cond, is_delete); |
569 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_CHROOT)) |
570 |
|
|
return ccs_write_chroot_policy(data, domain, cond, is_delete); |
571 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_PIVOT_ROOT)) |
572 |
|
|
return ccs_write_pivot_root_policy(data, domain, cond, |
573 |
|
|
is_delete); |
574 |
|
|
return ccs_write_file_policy(data, domain, cond, is_delete); |
575 |
|
|
} |
576 |
|
|
|
577 |
kumaneko |
2863 |
/** |
578 |
|
|
* ccs_write_domain_policy - Write domain policy. |
579 |
|
|
* |
580 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
581 |
|
|
* |
582 |
|
|
* Returns 0 on success, negative value otherwise. |
583 |
|
|
*/ |
584 |
|
|
static int ccs_write_domain_policy(struct ccs_io_buffer *head) |
585 |
|
|
{ |
586 |
|
|
char *data = head->write_buf; |
587 |
|
|
struct ccs_domain_info *domain = head->write_var1; |
588 |
|
|
bool is_delete = false; |
589 |
|
|
bool is_select = false; |
590 |
|
|
unsigned int profile; |
591 |
|
|
struct ccs_condition *cond = NULL; |
592 |
|
|
char *cp; |
593 |
|
|
int error; |
594 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_DELETE)) |
595 |
kumaneko |
2863 |
is_delete = true; |
596 |
kumaneko |
2892 |
else if (ccs_str_starts(&data, CCS_KEYWORD_SELECT)) |
597 |
kumaneko |
2863 |
is_select = true; |
598 |
|
|
if (is_select && ccs_is_select_one(head, data)) |
599 |
|
|
return 0; |
600 |
|
|
/* Don't allow updating policies by non manager programs. */ |
601 |
|
|
if (!ccs_is_policy_manager()) |
602 |
|
|
return -EPERM; |
603 |
|
|
if (ccs_is_domain_def(data)) { |
604 |
|
|
domain = NULL; |
605 |
|
|
if (is_delete) |
606 |
|
|
ccs_delete_domain(data); |
607 |
|
|
else if (is_select) |
608 |
|
|
domain = ccs_find_domain(data); |
609 |
|
|
else |
610 |
|
|
domain = ccs_find_or_assign_new_domain(data, 0); |
611 |
|
|
head->write_var1 = domain; |
612 |
|
|
return 0; |
613 |
|
|
} |
614 |
|
|
if (!domain) |
615 |
|
|
return -EINVAL; |
616 |
|
|
|
617 |
kumaneko |
2892 |
if (sscanf(data, CCS_KEYWORD_USE_PROFILE "%u", &profile) == 1 |
618 |
|
|
&& profile < CCS_MAX_PROFILES) { |
619 |
kumaneko |
2863 |
if (ccs_profile_ptr[profile] || !ccs_policy_loaded) |
620 |
|
|
domain->profile = (u8) profile; |
621 |
|
|
return 0; |
622 |
|
|
} |
623 |
kumaneko |
2892 |
if (!strcmp(data, CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { |
624 |
kumaneko |
2863 |
domain->ignore_global_allow_read = !is_delete; |
625 |
|
|
return 0; |
626 |
|
|
} |
627 |
kumaneko |
2892 |
if (!strcmp(data, CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_ENV)) { |
628 |
kumaneko |
2863 |
domain->ignore_global_allow_env = !is_delete; |
629 |
|
|
return 0; |
630 |
|
|
} |
631 |
|
|
cp = ccs_find_condition_part(data); |
632 |
|
|
if (cp) { |
633 |
|
|
cond = ccs_get_condition(cp); |
634 |
|
|
if (!cond) |
635 |
|
|
return -EINVAL; |
636 |
|
|
} |
637 |
kumaneko |
2897 |
error = ccs_write_domain_policy2(data, domain, cond, is_delete); |
638 |
kumaneko |
2863 |
if (cond) |
639 |
|
|
ccs_put_condition(cond); |
640 |
|
|
return error; |
641 |
|
|
} |
642 |
|
|
|
643 |
kumaneko |
2888 |
static bool ccs_print_name_union(struct ccs_io_buffer *head, |
644 |
kumaneko |
2894 |
const struct ccs_name_union *ptr) |
645 |
kumaneko |
2863 |
{ |
646 |
kumaneko |
2894 |
int pos = head->read_avail; |
647 |
kumaneko |
2863 |
if (pos && head->read_buf[pos - 1] == ' ') |
648 |
|
|
head->read_avail--; |
649 |
kumaneko |
2888 |
if (ptr->is_group) |
650 |
kumaneko |
2870 |
return ccs_io_printf(head, " @%s", |
651 |
kumaneko |
2888 |
ptr->group->group_name->name); |
652 |
|
|
return ccs_io_printf(head, " %s", ptr->filename->name); |
653 |
kumaneko |
2863 |
} |
654 |
|
|
|
655 |
kumaneko |
2894 |
static bool ccs_print_name_union_quoted(struct ccs_io_buffer *head, |
656 |
|
|
const struct ccs_name_union *ptr) |
657 |
kumaneko |
2863 |
{ |
658 |
kumaneko |
2894 |
if (ptr->is_group) |
659 |
|
|
return ccs_io_printf(head, "@%s", |
660 |
|
|
ptr->group->group_name->name); |
661 |
|
|
return ccs_io_printf(head, "\"%s\"", ptr->filename->name); |
662 |
|
|
} |
663 |
|
|
|
664 |
|
|
static bool ccs_print_number_union_common(struct ccs_io_buffer *head, |
665 |
|
|
const struct ccs_number_union *ptr, |
666 |
|
|
const bool need_space) |
667 |
|
|
{ |
668 |
kumaneko |
2888 |
unsigned long min; |
669 |
|
|
unsigned long max; |
670 |
kumaneko |
2890 |
u8 min_type; |
671 |
|
|
u8 max_type; |
672 |
kumaneko |
2894 |
if (need_space && !ccs_io_printf(head, " ")) |
673 |
|
|
return false; |
674 |
kumaneko |
2888 |
if (ptr->is_group) |
675 |
kumaneko |
2894 |
return ccs_io_printf(head, "@%s", |
676 |
kumaneko |
2888 |
ptr->group->group_name->name); |
677 |
kumaneko |
2890 |
min_type = ptr->min_type; |
678 |
|
|
max_type = ptr->max_type; |
679 |
kumaneko |
2888 |
min = ptr->values[0]; |
680 |
|
|
max = ptr->values[1]; |
681 |
kumaneko |
2890 |
switch (min_type) { |
682 |
kumaneko |
2892 |
case CCS_VALUE_TYPE_HEXADECIMAL: |
683 |
kumaneko |
2894 |
if (!ccs_io_printf(head, "0x%lX", min)) |
684 |
kumaneko |
2890 |
return false; |
685 |
|
|
break; |
686 |
kumaneko |
2892 |
case CCS_VALUE_TYPE_OCTAL: |
687 |
kumaneko |
2894 |
if (!ccs_io_printf(head, "0%lo", min)) |
688 |
kumaneko |
2890 |
return false; |
689 |
|
|
break; |
690 |
|
|
default: |
691 |
kumaneko |
2894 |
if (!ccs_io_printf(head, "%lu", min)) |
692 |
kumaneko |
2890 |
return false; |
693 |
|
|
break; |
694 |
|
|
} |
695 |
|
|
if (min == max && min_type == max_type) |
696 |
|
|
return true; |
697 |
|
|
switch (max_type) { |
698 |
kumaneko |
2892 |
case CCS_VALUE_TYPE_HEXADECIMAL: |
699 |
kumaneko |
2890 |
return ccs_io_printf(head, "-0x%lX", max); |
700 |
kumaneko |
2892 |
case CCS_VALUE_TYPE_OCTAL: |
701 |
kumaneko |
2890 |
return ccs_io_printf(head, "-0%lo", max); |
702 |
|
|
default: |
703 |
|
|
return ccs_io_printf(head, "-%lu", max); |
704 |
|
|
} |
705 |
kumaneko |
2863 |
} |
706 |
|
|
|
707 |
kumaneko |
2900 |
bool ccs_print_number_union(struct ccs_io_buffer *head, |
708 |
|
|
const struct ccs_number_union *ptr) |
709 |
kumaneko |
2894 |
{ |
710 |
|
|
return ccs_print_number_union_common(head, ptr, true); |
711 |
|
|
} |
712 |
|
|
|
713 |
|
|
static bool ccs_print_number_union_nospace(struct ccs_io_buffer *head, |
714 |
|
|
const struct ccs_number_union *ptr) |
715 |
|
|
{ |
716 |
|
|
return ccs_print_number_union_common(head, ptr, false); |
717 |
|
|
} |
718 |
|
|
|
719 |
kumaneko |
2863 |
/** |
720 |
kumaneko |
2894 |
* ccs_print_condition - Print condition part. |
721 |
|
|
* |
722 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
723 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
724 |
|
|
* |
725 |
|
|
* Returns true on success, false otherwise. |
726 |
|
|
*/ |
727 |
|
|
static bool ccs_print_condition(struct ccs_io_buffer *head, |
728 |
|
|
const struct ccs_condition *cond) |
729 |
|
|
{ |
730 |
|
|
const struct ccs_condition_element *condp; |
731 |
|
|
const struct ccs_number_union *numbers_p; |
732 |
|
|
const struct ccs_name_union *names_p; |
733 |
|
|
const struct ccs_argv_entry *argv; |
734 |
|
|
const struct ccs_envp_entry *envp; |
735 |
|
|
u16 condc; |
736 |
|
|
u16 i; |
737 |
|
|
u16 j; |
738 |
|
|
char buffer[32]; |
739 |
|
|
if (!cond) |
740 |
|
|
goto no_condition; |
741 |
|
|
condc = cond->condc; |
742 |
|
|
condp = (const struct ccs_condition_element *) (cond + 1); |
743 |
|
|
numbers_p = (const struct ccs_number_union *) (condp + condc); |
744 |
|
|
names_p = (const struct ccs_name_union *) |
745 |
|
|
(numbers_p + cond->numbers_count); |
746 |
|
|
argv = (const struct ccs_argv_entry *) (names_p + cond->names_count); |
747 |
|
|
envp = (const struct ccs_envp_entry *) (argv + cond->argc); |
748 |
|
|
memset(buffer, 0, sizeof(buffer)); |
749 |
|
|
if (condc && !ccs_io_printf(head, "%s", " if")) |
750 |
|
|
goto out; |
751 |
|
|
for (i = 0; i < condc; i++) { |
752 |
|
|
const u8 match = condp->equals; |
753 |
|
|
const u8 left = condp->left; |
754 |
|
|
const u8 right = condp->right; |
755 |
|
|
condp++; |
756 |
|
|
switch (left) { |
757 |
|
|
case CCS_ARGV_ENTRY: |
758 |
|
|
if (!ccs_io_printf(head, " exec.argv[%u]%s\"%s\"", |
759 |
|
|
argv->index, argv->is_not ? |
760 |
|
|
"!=" : "=", argv->value->name)) |
761 |
|
|
goto out; |
762 |
|
|
argv++; |
763 |
|
|
continue; |
764 |
|
|
case CCS_ENVP_ENTRY: |
765 |
|
|
if (!ccs_io_printf(head, " exec.envp[\"%s\"]%s", |
766 |
|
|
envp->name->name, envp->is_not ? |
767 |
|
|
"!=" : "=")) |
768 |
|
|
goto out; |
769 |
|
|
if (envp->value) { |
770 |
|
|
if (!ccs_io_printf(head, "\"%s\"", |
771 |
|
|
envp->value->name)) |
772 |
|
|
goto out; |
773 |
|
|
} else { |
774 |
|
|
if (!ccs_io_printf(head, "NULL")) |
775 |
|
|
goto out; |
776 |
|
|
} |
777 |
|
|
envp++; |
778 |
|
|
continue; |
779 |
|
|
case CCS_NUMBER_UNION: |
780 |
|
|
if (!ccs_print_number_union(head, numbers_p++)) |
781 |
|
|
goto out; |
782 |
|
|
break; |
783 |
|
|
default: |
784 |
|
|
if (left >= CCS_MAX_CONDITION_KEYWORD) |
785 |
|
|
goto out; |
786 |
|
|
if (!ccs_io_printf(head, " %s", |
787 |
|
|
ccs_condition_keyword[left])) |
788 |
|
|
goto out; |
789 |
|
|
break; |
790 |
|
|
} |
791 |
|
|
if (!ccs_io_printf(head, "%s", match ? "=" : "!=")) |
792 |
|
|
goto out; |
793 |
|
|
switch (right) { |
794 |
|
|
case CCS_NAME_UNION: |
795 |
|
|
if (!ccs_print_name_union_quoted(head, names_p++)) |
796 |
|
|
goto out; |
797 |
|
|
break; |
798 |
|
|
case CCS_NUMBER_UNION: |
799 |
|
|
if (!ccs_print_number_union_nospace(head, numbers_p++)) |
800 |
|
|
goto out; |
801 |
|
|
break; |
802 |
|
|
default: |
803 |
|
|
if (right >= CCS_MAX_CONDITION_KEYWORD) |
804 |
|
|
goto out; |
805 |
|
|
if (!ccs_io_printf(head, "%s", |
806 |
|
|
ccs_condition_keyword[right])) |
807 |
|
|
goto out; |
808 |
|
|
break; |
809 |
|
|
} |
810 |
|
|
} |
811 |
|
|
i = cond->post_state[3]; |
812 |
|
|
if (!i) |
813 |
|
|
goto no_condition; |
814 |
|
|
if (!ccs_io_printf(head, " ; set")) |
815 |
|
|
goto out; |
816 |
|
|
for (j = 0; j < 3; j++) { |
817 |
|
|
if (!(i & (1 << j))) |
818 |
|
|
continue; |
819 |
|
|
if (!ccs_io_printf(head, " task.state[%u]=%u", j, |
820 |
|
|
cond->post_state[j])) |
821 |
|
|
goto out; |
822 |
|
|
} |
823 |
|
|
no_condition: |
824 |
|
|
if (ccs_io_printf(head, "\n")) |
825 |
|
|
return true; |
826 |
|
|
out: |
827 |
|
|
return false; |
828 |
|
|
} |
829 |
|
|
|
830 |
|
|
/** |
831 |
kumaneko |
2863 |
* ccs_print_single_path_acl - Print a single path ACL entry. |
832 |
|
|
* |
833 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
834 |
|
|
* @ptr: Pointer to "struct ccs_single_path_acl_record". |
835 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
836 |
|
|
* |
837 |
|
|
* Returns true on success, false otherwise. |
838 |
|
|
*/ |
839 |
|
|
static bool ccs_print_single_path_acl(struct ccs_io_buffer *head, |
840 |
|
|
struct ccs_single_path_acl_record *ptr, |
841 |
|
|
const struct ccs_condition *cond) |
842 |
|
|
{ |
843 |
|
|
int pos; |
844 |
|
|
u8 bit; |
845 |
|
|
const u16 perm = ptr->perm; |
846 |
kumaneko |
2892 |
for (bit = head->read_bit; bit < CCS_MAX_SINGLE_PATH_OPERATION; bit++) { |
847 |
kumaneko |
2863 |
const char *msg; |
848 |
|
|
if (!(perm & (1 << bit))) |
849 |
|
|
continue; |
850 |
kumaneko |
2892 |
if (head->read_execute_only && bit != CCS_TYPE_EXECUTE_ACL) |
851 |
kumaneko |
2863 |
continue; |
852 |
|
|
/* Print "read/write" instead of "read" and "write". */ |
853 |
kumaneko |
2892 |
if ((bit == CCS_TYPE_READ_ACL || bit == CCS_TYPE_WRITE_ACL) |
854 |
|
|
&& (perm & (1 << CCS_TYPE_READ_WRITE_ACL))) |
855 |
kumaneko |
2863 |
continue; |
856 |
|
|
msg = ccs_sp2keyword(bit); |
857 |
|
|
pos = head->read_avail; |
858 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
859 |
kumaneko |
2888 |
!ccs_print_name_union(head, &ptr->name) || |
860 |
kumaneko |
2897 |
!ccs_print_condition(head, cond)) { |
861 |
|
|
head->read_bit = bit; |
862 |
|
|
head->read_avail = pos; |
863 |
|
|
return false; |
864 |
|
|
} |
865 |
kumaneko |
2863 |
} |
866 |
|
|
head->read_bit = 0; |
867 |
|
|
return true; |
868 |
|
|
} |
869 |
|
|
|
870 |
|
|
/** |
871 |
|
|
* ccs_print_mkdev_acl - Print a mkdev ACL entry. |
872 |
|
|
* |
873 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
874 |
|
|
* @ptr: Pointer to "struct ccs_mkdev_acl_record". |
875 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
876 |
|
|
* |
877 |
|
|
* Returns true on success, false otherwise. |
878 |
|
|
*/ |
879 |
|
|
static bool ccs_print_mkdev_acl(struct ccs_io_buffer *head, |
880 |
|
|
struct ccs_mkdev_acl_record *ptr, |
881 |
|
|
const struct ccs_condition *cond) |
882 |
|
|
{ |
883 |
|
|
int pos; |
884 |
|
|
u8 bit; |
885 |
|
|
const u16 perm = ptr->perm; |
886 |
kumaneko |
2892 |
for (bit = head->read_bit; bit < CCS_MAX_MKDEV_OPERATION; bit++) { |
887 |
kumaneko |
2863 |
const char *msg; |
888 |
|
|
if (!(perm & (1 << bit))) |
889 |
|
|
continue; |
890 |
|
|
msg = ccs_mkdev2keyword(bit); |
891 |
|
|
pos = head->read_avail; |
892 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
893 |
kumaneko |
2888 |
!ccs_print_name_union(head, &ptr->name) || |
894 |
|
|
!ccs_print_number_union(head, &ptr->major) || |
895 |
|
|
!ccs_print_number_union(head, &ptr->minor) || |
896 |
kumaneko |
2897 |
!ccs_print_condition(head, cond)) { |
897 |
|
|
head->read_bit = bit; |
898 |
|
|
head->read_avail = pos; |
899 |
|
|
return false; |
900 |
|
|
} |
901 |
kumaneko |
2863 |
} |
902 |
|
|
head->read_bit = 0; |
903 |
|
|
return true; |
904 |
|
|
} |
905 |
|
|
|
906 |
|
|
/** |
907 |
|
|
* ccs_print_double_path_acl - Print a double path ACL entry. |
908 |
|
|
* |
909 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
910 |
|
|
* @ptr: Pointer to "struct ccs_double_path_acl_record". |
911 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
912 |
|
|
* |
913 |
|
|
* Returns true on success, false otherwise. |
914 |
|
|
*/ |
915 |
|
|
static bool ccs_print_double_path_acl(struct ccs_io_buffer *head, |
916 |
|
|
struct ccs_double_path_acl_record *ptr, |
917 |
|
|
const struct ccs_condition *cond) |
918 |
|
|
{ |
919 |
|
|
int pos; |
920 |
|
|
u8 bit; |
921 |
|
|
const u8 perm = ptr->perm; |
922 |
kumaneko |
2892 |
for (bit = head->read_bit; bit < CCS_MAX_DOUBLE_PATH_OPERATION; bit++) { |
923 |
kumaneko |
2863 |
const char *msg; |
924 |
|
|
if (!(perm & (1 << bit))) |
925 |
|
|
continue; |
926 |
|
|
msg = ccs_dp2keyword(bit); |
927 |
|
|
pos = head->read_avail; |
928 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
929 |
kumaneko |
2888 |
!ccs_print_name_union(head, &ptr->name1) || |
930 |
|
|
!ccs_print_name_union(head, &ptr->name2) || |
931 |
kumaneko |
2897 |
!ccs_print_condition(head, cond)) { |
932 |
|
|
head->read_bit = bit; |
933 |
|
|
head->read_avail = pos; |
934 |
|
|
return false; |
935 |
|
|
} |
936 |
kumaneko |
2863 |
} |
937 |
|
|
head->read_bit = 0; |
938 |
|
|
return true; |
939 |
|
|
} |
940 |
|
|
|
941 |
|
|
/** |
942 |
kumaneko |
2871 |
* ccs_print_path_number_acl - Print an ioctl/chmod/chown/chgrp ACL entry. |
943 |
kumaneko |
2863 |
* |
944 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
945 |
kumaneko |
2871 |
* @ptr: Pointer to "struct ccs_path_number_acl_record". |
946 |
kumaneko |
2863 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
947 |
|
|
* |
948 |
|
|
* Returns true on success, false otherwise. |
949 |
|
|
*/ |
950 |
kumaneko |
2871 |
static bool ccs_print_path_number_acl(struct ccs_io_buffer *head, |
951 |
|
|
struct ccs_path_number_acl_record *ptr, |
952 |
|
|
const struct ccs_condition *cond) |
953 |
kumaneko |
2863 |
{ |
954 |
kumaneko |
2871 |
int pos; |
955 |
|
|
u8 bit; |
956 |
|
|
const u8 perm = ptr->perm; |
957 |
kumaneko |
2892 |
for (bit = head->read_bit; bit < CCS_MAX_PATH_NUMBER_OPERATION; bit++) { |
958 |
kumaneko |
2871 |
const char *msg; |
959 |
|
|
if (!(perm & (1 << bit))) |
960 |
|
|
continue; |
961 |
|
|
msg = ccs_path_number2keyword(bit); |
962 |
|
|
pos = head->read_avail; |
963 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
964 |
kumaneko |
2888 |
!ccs_print_name_union(head, &ptr->name) || |
965 |
|
|
!ccs_print_number_union(head, &ptr->number) || |
966 |
kumaneko |
2897 |
!ccs_print_condition(head, cond)) { |
967 |
|
|
head->read_bit = bit; |
968 |
|
|
head->read_avail = pos; |
969 |
|
|
return false; |
970 |
|
|
} |
971 |
kumaneko |
2871 |
} |
972 |
|
|
head->read_bit = 0; |
973 |
kumaneko |
2863 |
return true; |
974 |
|
|
} |
975 |
|
|
|
976 |
|
|
/** |
977 |
|
|
* ccs_print_env_acl - Print an evironment variable name's ACL entry. |
978 |
|
|
* |
979 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
980 |
|
|
* @ptr: Pointer to "struct ccs_env_acl_record". |
981 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
982 |
|
|
* |
983 |
|
|
* Returns true on success, false otherwise. |
984 |
|
|
*/ |
985 |
|
|
static bool ccs_print_env_acl(struct ccs_io_buffer *head, |
986 |
|
|
struct ccs_env_acl_record *ptr, |
987 |
|
|
const struct ccs_condition *cond) |
988 |
|
|
{ |
989 |
kumaneko |
2897 |
const int pos = head->read_avail; |
990 |
|
|
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_ENV "%s", ptr->env->name) || |
991 |
|
|
!ccs_print_condition(head, cond)) { |
992 |
|
|
head->read_avail = pos; |
993 |
|
|
return false; |
994 |
|
|
} |
995 |
kumaneko |
2863 |
return true; |
996 |
|
|
} |
997 |
|
|
|
998 |
|
|
/** |
999 |
|
|
* ccs_print_capability_acl - Print a capability ACL entry. |
1000 |
|
|
* |
1001 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1002 |
|
|
* @ptr: Pointer to "struct ccs_capability_acl_record". |
1003 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1004 |
|
|
* |
1005 |
|
|
* Returns true on success, false otherwise. |
1006 |
|
|
*/ |
1007 |
|
|
static bool ccs_print_capability_acl(struct ccs_io_buffer *head, |
1008 |
|
|
struct ccs_capability_acl_record *ptr, |
1009 |
|
|
const struct ccs_condition *cond) |
1010 |
|
|
{ |
1011 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1012 |
kumaneko |
2892 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_CAPABILITY "%s", |
1013 |
kumaneko |
2897 |
ccs_cap2keyword(ptr->operation)) || |
1014 |
|
|
!ccs_print_condition(head, cond)) { |
1015 |
|
|
head->read_avail = pos; |
1016 |
|
|
return false; |
1017 |
|
|
} |
1018 |
kumaneko |
2863 |
return true; |
1019 |
|
|
} |
1020 |
|
|
|
1021 |
|
|
/** |
1022 |
|
|
* ccs_print_ipv4_entry - Print IPv4 address of a network ACL entry. |
1023 |
|
|
* |
1024 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1025 |
|
|
* @ptr: Pointer to "struct ccs_ip_network_acl_record". |
1026 |
|
|
* |
1027 |
|
|
* Returns true on success, false otherwise. |
1028 |
|
|
*/ |
1029 |
|
|
static bool ccs_print_ipv4_entry(struct ccs_io_buffer *head, |
1030 |
|
|
struct ccs_ip_network_acl_record *ptr) |
1031 |
|
|
{ |
1032 |
|
|
const u32 min_address = ptr->address.ipv4.min; |
1033 |
|
|
const u32 max_address = ptr->address.ipv4.max; |
1034 |
|
|
if (!ccs_io_printf(head, "%u.%u.%u.%u", HIPQUAD(min_address))) |
1035 |
|
|
return false; |
1036 |
|
|
if (min_address != max_address |
1037 |
|
|
&& !ccs_io_printf(head, "-%u.%u.%u.%u", HIPQUAD(max_address))) |
1038 |
|
|
return false; |
1039 |
|
|
return true; |
1040 |
|
|
} |
1041 |
|
|
|
1042 |
|
|
/** |
1043 |
|
|
* ccs_print_ipv6_entry - Print IPv6 address of a network ACL entry. |
1044 |
|
|
* |
1045 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1046 |
|
|
* @ptr: Pointer to "struct ccs_ip_network_acl_record". |
1047 |
|
|
* |
1048 |
|
|
* Returns true on success, false otherwise. |
1049 |
|
|
*/ |
1050 |
|
|
static bool ccs_print_ipv6_entry(struct ccs_io_buffer *head, |
1051 |
|
|
struct ccs_ip_network_acl_record *ptr) |
1052 |
|
|
{ |
1053 |
|
|
char buf[64]; |
1054 |
|
|
const struct in6_addr *min_address = ptr->address.ipv6.min; |
1055 |
|
|
const struct in6_addr *max_address = ptr->address.ipv6.max; |
1056 |
|
|
ccs_print_ipv6(buf, sizeof(buf), min_address); |
1057 |
|
|
if (!ccs_io_printf(head, "%s", buf)) |
1058 |
|
|
return false; |
1059 |
|
|
if (min_address != max_address) { |
1060 |
|
|
ccs_print_ipv6(buf, sizeof(buf), max_address); |
1061 |
|
|
if (!ccs_io_printf(head, "-%s", buf)) |
1062 |
|
|
return false; |
1063 |
|
|
} |
1064 |
|
|
return true; |
1065 |
|
|
} |
1066 |
|
|
|
1067 |
|
|
/** |
1068 |
|
|
* ccs_print_network_acl - Print a network ACL entry. |
1069 |
|
|
* |
1070 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1071 |
|
|
* @ptr: Pointer to "struct ccs_ip_network_acl_record". |
1072 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1073 |
|
|
* |
1074 |
|
|
* Returns true on success, false otherwise. |
1075 |
|
|
*/ |
1076 |
|
|
static bool ccs_print_network_acl(struct ccs_io_buffer *head, |
1077 |
|
|
struct ccs_ip_network_acl_record *ptr, |
1078 |
|
|
const struct ccs_condition *cond) |
1079 |
|
|
{ |
1080 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1081 |
kumaneko |
2892 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_NETWORK "%s ", |
1082 |
kumaneko |
2863 |
ccs_net2keyword(ptr->operation_type))) |
1083 |
|
|
goto out; |
1084 |
|
|
switch (ptr->record_type) { |
1085 |
kumaneko |
2892 |
case CCS_IP_RECORD_TYPE_ADDRESS_GROUP: |
1086 |
kumaneko |
2863 |
if (!ccs_io_printf(head, "@%s", |
1087 |
|
|
ptr->address.group->group_name->name)) |
1088 |
|
|
goto out; |
1089 |
|
|
break; |
1090 |
kumaneko |
2892 |
case CCS_IP_RECORD_TYPE_IPv4: |
1091 |
kumaneko |
2863 |
if (!ccs_print_ipv4_entry(head, ptr)) |
1092 |
|
|
goto out; |
1093 |
|
|
break; |
1094 |
kumaneko |
2892 |
case CCS_IP_RECORD_TYPE_IPv6: |
1095 |
kumaneko |
2863 |
if (!ccs_print_ipv6_entry(head, ptr)) |
1096 |
|
|
goto out; |
1097 |
|
|
break; |
1098 |
|
|
} |
1099 |
kumaneko |
2888 |
if (!ccs_print_number_union(head, &ptr->port) || |
1100 |
kumaneko |
2863 |
!ccs_print_condition(head, cond)) |
1101 |
|
|
goto out; |
1102 |
|
|
return true; |
1103 |
|
|
out: |
1104 |
|
|
head->read_avail = pos; |
1105 |
|
|
return false; |
1106 |
|
|
} |
1107 |
|
|
|
1108 |
|
|
/** |
1109 |
|
|
* ccs_print_signal_acl - Print a signal ACL entry. |
1110 |
|
|
* |
1111 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1112 |
|
|
* @ptr: Pointer to "struct signale_acl_record". |
1113 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1114 |
|
|
* |
1115 |
|
|
* Returns true on success, false otherwise. |
1116 |
|
|
*/ |
1117 |
|
|
static bool ccs_print_signal_acl(struct ccs_io_buffer *head, |
1118 |
|
|
struct ccs_signal_acl_record *ptr, |
1119 |
|
|
const struct ccs_condition *cond) |
1120 |
|
|
{ |
1121 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1122 |
kumaneko |
2892 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_SIGNAL "%u %s", |
1123 |
kumaneko |
2897 |
ptr->sig, ptr->domainname->name) || |
1124 |
|
|
!ccs_print_condition(head, cond)) { |
1125 |
|
|
head->read_avail = pos; |
1126 |
|
|
return false; |
1127 |
|
|
} |
1128 |
kumaneko |
2863 |
return true; |
1129 |
|
|
} |
1130 |
|
|
|
1131 |
|
|
/** |
1132 |
|
|
* ccs_print_execute_handler_record - Print an execute handler ACL entry. |
1133 |
|
|
* |
1134 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1135 |
|
|
* @keyword: Name of the keyword. |
1136 |
|
|
* @ptr: Pointer to "struct ccs_execute_handler_record". |
1137 |
|
|
* |
1138 |
|
|
* Returns true on success, false otherwise. |
1139 |
|
|
*/ |
1140 |
|
|
static bool ccs_print_execute_handler_record(struct ccs_io_buffer *head, |
1141 |
|
|
const char *keyword, |
1142 |
|
|
struct ccs_execute_handler_record * |
1143 |
|
|
ptr) |
1144 |
|
|
{ |
1145 |
|
|
return ccs_io_printf(head, "%s %s\n", keyword, ptr->handler->name); |
1146 |
|
|
} |
1147 |
|
|
|
1148 |
|
|
/** |
1149 |
|
|
* ccs_print_mount_acl - Print a mount ACL entry. |
1150 |
|
|
* |
1151 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1152 |
|
|
* @ptr: Pointer to "struct ccs_mount_acl_record". |
1153 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1154 |
|
|
* |
1155 |
|
|
* Returns true on success, false otherwise. |
1156 |
|
|
*/ |
1157 |
|
|
static bool ccs_print_mount_acl(struct ccs_io_buffer *head, |
1158 |
|
|
struct ccs_mount_acl_record *ptr, |
1159 |
|
|
const struct ccs_condition *cond) |
1160 |
|
|
{ |
1161 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1162 |
|
|
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_MOUNT) || |
1163 |
|
|
!ccs_print_name_union(head, &ptr->dev_name) || |
1164 |
|
|
!ccs_print_name_union(head, &ptr->dir_name) || |
1165 |
|
|
!ccs_print_name_union(head, &ptr->fs_type) || |
1166 |
|
|
!ccs_print_number_union(head, &ptr->flags) || |
1167 |
|
|
!ccs_print_condition(head, cond)) { |
1168 |
|
|
head->read_avail = pos; |
1169 |
|
|
return false; |
1170 |
|
|
} |
1171 |
kumaneko |
2863 |
return true; |
1172 |
|
|
} |
1173 |
|
|
|
1174 |
|
|
/** |
1175 |
|
|
* ccs_print_umount_acl - Print a mount ACL entry. |
1176 |
|
|
* |
1177 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1178 |
|
|
* @ptr: Pointer to "struct ccs_umount_acl_record". |
1179 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1180 |
|
|
* |
1181 |
|
|
* Returns true on success, false otherwise. |
1182 |
|
|
*/ |
1183 |
|
|
static bool ccs_print_umount_acl(struct ccs_io_buffer *head, |
1184 |
|
|
struct ccs_umount_acl_record *ptr, |
1185 |
|
|
const struct ccs_condition *cond) |
1186 |
|
|
{ |
1187 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1188 |
|
|
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_UNMOUNT) || |
1189 |
|
|
!ccs_print_name_union(head, &ptr->dir) || |
1190 |
|
|
!ccs_print_condition(head, cond)) { |
1191 |
|
|
head->read_avail = pos; |
1192 |
|
|
return false; |
1193 |
|
|
} |
1194 |
kumaneko |
2863 |
return true; |
1195 |
|
|
} |
1196 |
|
|
|
1197 |
|
|
/** |
1198 |
|
|
* ccs_print_chroot_acl - Print a chroot ACL entry. |
1199 |
|
|
* |
1200 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1201 |
|
|
* @ptr: Pointer to "struct ccs_chroot_acl_record". |
1202 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1203 |
|
|
* |
1204 |
|
|
* Returns true on success, false otherwise. |
1205 |
|
|
*/ |
1206 |
|
|
static bool ccs_print_chroot_acl(struct ccs_io_buffer *head, |
1207 |
|
|
struct ccs_chroot_acl_record *ptr, |
1208 |
|
|
const struct ccs_condition *cond) |
1209 |
|
|
{ |
1210 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1211 |
|
|
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_CHROOT) || |
1212 |
|
|
!ccs_print_name_union(head, &ptr->dir) || |
1213 |
|
|
!ccs_print_condition(head, cond)) { |
1214 |
|
|
head->read_avail = pos; |
1215 |
|
|
return false; |
1216 |
|
|
} |
1217 |
kumaneko |
2863 |
return true; |
1218 |
|
|
} |
1219 |
|
|
|
1220 |
|
|
/** |
1221 |
|
|
* ccs_print_pivot_root_acl - Print a pivot_root ACL entry. |
1222 |
|
|
* |
1223 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1224 |
|
|
* @ptr: Pointer to "struct ccs_pivot_root_acl_record". |
1225 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1226 |
|
|
* |
1227 |
|
|
* Returns true on success, false otherwise. |
1228 |
|
|
*/ |
1229 |
|
|
static bool ccs_print_pivot_root_acl(struct ccs_io_buffer *head, |
1230 |
|
|
struct ccs_pivot_root_acl_record *ptr, |
1231 |
|
|
const struct ccs_condition *cond) |
1232 |
|
|
{ |
1233 |
kumaneko |
2897 |
const int pos = head->read_avail; |
1234 |
|
|
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_PIVOT_ROOT) || |
1235 |
|
|
!ccs_print_name_union(head, &ptr->new_root) || |
1236 |
|
|
!ccs_print_name_union(head, &ptr->old_root) || |
1237 |
|
|
!ccs_print_condition(head, cond)) { |
1238 |
|
|
head->read_avail = pos; |
1239 |
|
|
return false; |
1240 |
|
|
} |
1241 |
kumaneko |
2863 |
return true; |
1242 |
|
|
} |
1243 |
|
|
|
1244 |
|
|
/** |
1245 |
|
|
* ccs_print_entry - Print an ACL entry. |
1246 |
|
|
* |
1247 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1248 |
|
|
* @ptr: Pointer to an ACL entry. |
1249 |
|
|
* |
1250 |
|
|
* Returns true on success, false otherwise. |
1251 |
|
|
*/ |
1252 |
|
|
static bool ccs_print_entry(struct ccs_io_buffer *head, |
1253 |
|
|
struct ccs_acl_info *ptr) |
1254 |
|
|
{ |
1255 |
|
|
const struct ccs_condition *cond = ptr->cond; |
1256 |
kumaneko |
2900 |
const u8 acl_type = ptr->type; |
1257 |
|
|
if (ptr->is_deleted) |
1258 |
kumaneko |
2863 |
return true; |
1259 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_SINGLE_PATH_ACL) { |
1260 |
kumaneko |
2863 |
struct ccs_single_path_acl_record *acl |
1261 |
|
|
= container_of(ptr, struct ccs_single_path_acl_record, |
1262 |
|
|
head); |
1263 |
|
|
return ccs_print_single_path_acl(head, acl, cond); |
1264 |
|
|
} |
1265 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_EXECUTE_HANDLER) { |
1266 |
kumaneko |
2863 |
struct ccs_execute_handler_record *acl |
1267 |
|
|
= container_of(ptr, struct ccs_execute_handler_record, |
1268 |
|
|
head); |
1269 |
kumaneko |
2892 |
const char *keyword = CCS_KEYWORD_EXECUTE_HANDLER; |
1270 |
kumaneko |
2863 |
return ccs_print_execute_handler_record(head, keyword, acl); |
1271 |
|
|
} |
1272 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_DENIED_EXECUTE_HANDLER) { |
1273 |
kumaneko |
2863 |
struct ccs_execute_handler_record *acl |
1274 |
|
|
= container_of(ptr, struct ccs_execute_handler_record, |
1275 |
|
|
head); |
1276 |
kumaneko |
2892 |
const char *keyword = CCS_KEYWORD_DENIED_EXECUTE_HANDLER; |
1277 |
kumaneko |
2863 |
return ccs_print_execute_handler_record(head, keyword, acl); |
1278 |
|
|
} |
1279 |
|
|
if (head->read_execute_only) |
1280 |
|
|
return true; |
1281 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_MKDEV_ACL) { |
1282 |
kumaneko |
2863 |
struct ccs_mkdev_acl_record *acl |
1283 |
|
|
= container_of(ptr, struct ccs_mkdev_acl_record, head); |
1284 |
|
|
return ccs_print_mkdev_acl(head, acl, cond); |
1285 |
|
|
} |
1286 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_DOUBLE_PATH_ACL) { |
1287 |
kumaneko |
2863 |
struct ccs_double_path_acl_record *acl |
1288 |
|
|
= container_of(ptr, struct ccs_double_path_acl_record, |
1289 |
|
|
head); |
1290 |
|
|
return ccs_print_double_path_acl(head, acl, cond); |
1291 |
|
|
} |
1292 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_PATH_NUMBER_ACL) { |
1293 |
kumaneko |
2871 |
struct ccs_path_number_acl_record *acl |
1294 |
|
|
= container_of(ptr, struct ccs_path_number_acl_record, |
1295 |
|
|
head); |
1296 |
|
|
return ccs_print_path_number_acl(head, acl, cond); |
1297 |
kumaneko |
2863 |
} |
1298 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_ENV_ACL) { |
1299 |
kumaneko |
2863 |
struct ccs_env_acl_record *acl |
1300 |
|
|
= container_of(ptr, struct ccs_env_acl_record, head); |
1301 |
|
|
return ccs_print_env_acl(head, acl, cond); |
1302 |
|
|
} |
1303 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_CAPABILITY_ACL) { |
1304 |
kumaneko |
2863 |
struct ccs_capability_acl_record *acl |
1305 |
|
|
= container_of(ptr, struct ccs_capability_acl_record, |
1306 |
|
|
head); |
1307 |
|
|
return ccs_print_capability_acl(head, acl, cond); |
1308 |
|
|
} |
1309 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_IP_NETWORK_ACL) { |
1310 |
kumaneko |
2863 |
struct ccs_ip_network_acl_record *acl |
1311 |
|
|
= container_of(ptr, struct ccs_ip_network_acl_record, |
1312 |
|
|
head); |
1313 |
|
|
return ccs_print_network_acl(head, acl, cond); |
1314 |
|
|
} |
1315 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_SIGNAL_ACL) { |
1316 |
kumaneko |
2863 |
struct ccs_signal_acl_record *acl |
1317 |
|
|
= container_of(ptr, struct ccs_signal_acl_record, head); |
1318 |
|
|
return ccs_print_signal_acl(head, acl, cond); |
1319 |
|
|
} |
1320 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_MOUNT_ACL) { |
1321 |
kumaneko |
2863 |
struct ccs_mount_acl_record *acl |
1322 |
|
|
= container_of(ptr, struct ccs_mount_acl_record, head); |
1323 |
|
|
return ccs_print_mount_acl(head, acl, cond); |
1324 |
|
|
} |
1325 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_UMOUNT_ACL) { |
1326 |
kumaneko |
2863 |
struct ccs_umount_acl_record *acl |
1327 |
|
|
= container_of(ptr, struct ccs_umount_acl_record, head); |
1328 |
|
|
return ccs_print_umount_acl(head, acl, cond); |
1329 |
|
|
} |
1330 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_CHROOT_ACL) { |
1331 |
kumaneko |
2863 |
struct ccs_chroot_acl_record *acl |
1332 |
|
|
= container_of(ptr, struct ccs_chroot_acl_record, head); |
1333 |
|
|
return ccs_print_chroot_acl(head, acl, cond); |
1334 |
|
|
} |
1335 |
kumaneko |
2892 |
if (acl_type == CCS_TYPE_PIVOT_ROOT_ACL) { |
1336 |
kumaneko |
2863 |
struct ccs_pivot_root_acl_record *acl |
1337 |
|
|
= container_of(ptr, struct ccs_pivot_root_acl_record, |
1338 |
|
|
head); |
1339 |
|
|
return ccs_print_pivot_root_acl(head, acl, cond); |
1340 |
|
|
} |
1341 |
|
|
BUG(); /* This must not happen. */ |
1342 |
|
|
return false; |
1343 |
|
|
} |
1344 |
|
|
|
1345 |
|
|
/** |
1346 |
|
|
* ccs_read_domain_policy - Read domain policy. |
1347 |
|
|
* |
1348 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1349 |
|
|
* |
1350 |
|
|
* Returns 0. |
1351 |
|
|
* |
1352 |
|
|
* Caller holds ccs_read_lock(). |
1353 |
|
|
*/ |
1354 |
|
|
static int ccs_read_domain_policy(struct ccs_io_buffer *head) |
1355 |
|
|
{ |
1356 |
|
|
struct list_head *dpos; |
1357 |
|
|
struct list_head *apos; |
1358 |
|
|
ccs_check_read_lock(); |
1359 |
|
|
if (head->read_eof) |
1360 |
|
|
return 0; |
1361 |
|
|
if (head->read_step == 0) |
1362 |
|
|
head->read_step = 1; |
1363 |
|
|
list_for_each_cookie(dpos, head->read_var1, &ccs_domain_list) { |
1364 |
|
|
struct ccs_domain_info *domain; |
1365 |
|
|
const char *quota_exceeded = ""; |
1366 |
|
|
const char *transition_failed = ""; |
1367 |
|
|
const char *ignore_global_allow_read = ""; |
1368 |
|
|
const char *ignore_global_allow_env = ""; |
1369 |
|
|
domain = list_entry(dpos, struct ccs_domain_info, list); |
1370 |
|
|
if (head->read_step != 1) |
1371 |
|
|
goto acl_loop; |
1372 |
|
|
if (domain->is_deleted && !head->read_single_domain) |
1373 |
|
|
continue; |
1374 |
|
|
/* Print domainname and flags. */ |
1375 |
|
|
if (domain->quota_warned) |
1376 |
|
|
quota_exceeded = "quota_exceeded\n"; |
1377 |
|
|
if (domain->domain_transition_failed) |
1378 |
|
|
transition_failed = "transition_failed\n"; |
1379 |
|
|
if (domain->ignore_global_allow_read) |
1380 |
|
|
ignore_global_allow_read |
1381 |
kumaneko |
2892 |
= CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; |
1382 |
kumaneko |
2863 |
if (domain->ignore_global_allow_env) |
1383 |
|
|
ignore_global_allow_env |
1384 |
kumaneko |
2892 |
= CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_ENV "\n"; |
1385 |
|
|
if (!ccs_io_printf(head, "%s\n" CCS_KEYWORD_USE_PROFILE "%u\n" |
1386 |
kumaneko |
2863 |
"%s%s%s%s\n", domain->domainname->name, |
1387 |
|
|
domain->profile, quota_exceeded, |
1388 |
|
|
transition_failed, |
1389 |
|
|
ignore_global_allow_read, |
1390 |
|
|
ignore_global_allow_env)) |
1391 |
|
|
return 0; |
1392 |
|
|
head->read_step = 2; |
1393 |
|
|
acl_loop: |
1394 |
|
|
if (head->read_step == 3) |
1395 |
|
|
goto tail_mark; |
1396 |
|
|
/* Print ACL entries in the domain. */ |
1397 |
|
|
list_for_each_cookie(apos, head->read_var2, |
1398 |
|
|
&domain->acl_info_list) { |
1399 |
|
|
struct ccs_acl_info *ptr |
1400 |
|
|
= list_entry(apos, struct ccs_acl_info, list); |
1401 |
|
|
if (!ccs_print_entry(head, ptr)) |
1402 |
|
|
return 0; |
1403 |
|
|
} |
1404 |
|
|
head->read_step = 3; |
1405 |
|
|
tail_mark: |
1406 |
|
|
if (!ccs_io_printf(head, "\n")) |
1407 |
|
|
return 0; |
1408 |
|
|
head->read_step = 1; |
1409 |
|
|
if (head->read_single_domain) |
1410 |
|
|
break; |
1411 |
|
|
} |
1412 |
|
|
head->read_eof = true; |
1413 |
|
|
return 0; |
1414 |
|
|
} |
1415 |
|
|
|
1416 |
|
|
/** |
1417 |
|
|
* ccs_write_domain_profile - Assign profile for specified domain. |
1418 |
|
|
* |
1419 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1420 |
|
|
* |
1421 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1422 |
|
|
* |
1423 |
|
|
* This is equivalent to doing |
1424 |
|
|
* |
1425 |
|
|
* ( echo "select " $domainname; echo "use_profile " $profile ) | |
1426 |
|
|
* /usr/lib/ccs/loadpolicy -d |
1427 |
|
|
* |
1428 |
|
|
* Caller holds ccs_read_lock(). |
1429 |
|
|
*/ |
1430 |
|
|
static int ccs_write_domain_profile(struct ccs_io_buffer *head) |
1431 |
|
|
{ |
1432 |
|
|
char *data = head->write_buf; |
1433 |
|
|
char *cp = strchr(data, ' '); |
1434 |
|
|
struct ccs_domain_info *domain; |
1435 |
|
|
unsigned int profile; |
1436 |
|
|
ccs_check_read_lock(); |
1437 |
|
|
if (!cp) |
1438 |
|
|
return -EINVAL; |
1439 |
|
|
*cp = '\0'; |
1440 |
|
|
profile = simple_strtoul(data, NULL, 10); |
1441 |
kumaneko |
2892 |
if (profile >= CCS_MAX_PROFILES) |
1442 |
kumaneko |
2863 |
return -EINVAL; |
1443 |
|
|
domain = ccs_find_domain(cp + 1); |
1444 |
|
|
if (domain && (ccs_profile_ptr[profile] || !ccs_policy_loaded)) |
1445 |
|
|
domain->profile = (u8) profile; |
1446 |
|
|
return 0; |
1447 |
|
|
} |
1448 |
|
|
|
1449 |
|
|
/** |
1450 |
|
|
* ccs_read_domain_profile - Read only domainname and profile. |
1451 |
|
|
* |
1452 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1453 |
|
|
* |
1454 |
|
|
* Returns list of profile number and domainname pairs. |
1455 |
|
|
* |
1456 |
|
|
* This is equivalent to doing |
1457 |
|
|
* |
1458 |
|
|
* grep -A 1 '^<kernel>' /proc/ccs/domain_policy | |
1459 |
|
|
* awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) |
1460 |
|
|
* domainname = $0; } else if ( $1 == "use_profile" ) { |
1461 |
|
|
* print $2 " " domainname; domainname = ""; } } ; ' |
1462 |
|
|
* |
1463 |
|
|
* Caller holds ccs_read_lock(). |
1464 |
|
|
*/ |
1465 |
|
|
static int ccs_read_domain_profile(struct ccs_io_buffer *head) |
1466 |
|
|
{ |
1467 |
|
|
struct list_head *pos; |
1468 |
|
|
ccs_check_read_lock(); |
1469 |
|
|
if (head->read_eof) |
1470 |
|
|
return 0; |
1471 |
|
|
list_for_each_cookie(pos, head->read_var1, &ccs_domain_list) { |
1472 |
|
|
struct ccs_domain_info *domain; |
1473 |
|
|
domain = list_entry(pos, struct ccs_domain_info, list); |
1474 |
|
|
if (domain->is_deleted) |
1475 |
|
|
continue; |
1476 |
|
|
if (!ccs_io_printf(head, "%u %s\n", domain->profile, |
1477 |
|
|
domain->domainname->name)) |
1478 |
|
|
return 0; |
1479 |
|
|
} |
1480 |
|
|
head->read_eof = true; |
1481 |
|
|
return 0; |
1482 |
|
|
} |
1483 |
|
|
|
1484 |
|
|
/** |
1485 |
|
|
* ccs_write_pid: Specify PID to obtain domainname. |
1486 |
|
|
* |
1487 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1488 |
|
|
* |
1489 |
|
|
* Returns 0. |
1490 |
|
|
*/ |
1491 |
|
|
static int ccs_write_pid(struct ccs_io_buffer *head) |
1492 |
|
|
{ |
1493 |
|
|
head->read_eof = false; |
1494 |
|
|
return 0; |
1495 |
|
|
} |
1496 |
|
|
|
1497 |
|
|
/** |
1498 |
|
|
* ccs_read_pid - Read information of a process. |
1499 |
|
|
* |
1500 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1501 |
|
|
* |
1502 |
|
|
* Returns the domainname which the specified PID is in or |
1503 |
|
|
* process information of the specified PID on success, |
1504 |
|
|
* empty string otherwise. |
1505 |
|
|
* |
1506 |
|
|
* Caller holds ccs_read_lock(). |
1507 |
|
|
*/ |
1508 |
|
|
static int ccs_read_pid(struct ccs_io_buffer *head) |
1509 |
|
|
{ |
1510 |
|
|
char *buf = head->write_buf; |
1511 |
|
|
bool task_info = false; |
1512 |
|
|
unsigned int pid; |
1513 |
|
|
struct task_struct *p; |
1514 |
|
|
struct ccs_domain_info *domain = NULL; |
1515 |
|
|
u32 ccs_flags = 0; |
1516 |
|
|
ccs_check_read_lock(); |
1517 |
|
|
/* Accessing write_buf is safe because head->io_sem is held. */ |
1518 |
|
|
if (!buf) |
1519 |
|
|
goto done; /* Do nothing if open(O_RDONLY). */ |
1520 |
|
|
if (head->read_avail || head->read_eof) |
1521 |
|
|
goto done; |
1522 |
|
|
head->read_eof = true; |
1523 |
|
|
if (ccs_str_starts(&buf, "info ")) |
1524 |
|
|
task_info = true; |
1525 |
|
|
pid = (unsigned int) simple_strtoul(buf, NULL, 10); |
1526 |
|
|
/***** CRITICAL SECTION START *****/ |
1527 |
|
|
read_lock(&tasklist_lock); |
1528 |
|
|
p = find_task_by_pid(pid); |
1529 |
|
|
if (p) { |
1530 |
|
|
domain = ccs_task_domain(p); |
1531 |
|
|
ccs_flags = p->ccs_flags; |
1532 |
|
|
} |
1533 |
|
|
read_unlock(&tasklist_lock); |
1534 |
|
|
/***** CRITICAL SECTION END *****/ |
1535 |
|
|
if (!domain) |
1536 |
|
|
goto done; |
1537 |
|
|
if (!task_info) |
1538 |
|
|
ccs_io_printf(head, "%u %u %s", pid, domain->profile, |
1539 |
|
|
domain->domainname->name); |
1540 |
|
|
else |
1541 |
|
|
ccs_io_printf(head, "%u manager=%s execute_handler=%s " |
1542 |
|
|
"state[0]=%u state[1]=%u state[2]=%u", pid, |
1543 |
|
|
ccs_flags & CCS_TASK_IS_POLICY_MANAGER ? |
1544 |
|
|
"yes" : "no", |
1545 |
|
|
ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER ? |
1546 |
|
|
"yes" : "no", |
1547 |
|
|
(u8) (ccs_flags >> 24), |
1548 |
|
|
(u8) (ccs_flags >> 16), |
1549 |
|
|
(u8) (ccs_flags >> 8)); |
1550 |
|
|
done: |
1551 |
|
|
return 0; |
1552 |
|
|
} |
1553 |
|
|
|
1554 |
|
|
/** |
1555 |
|
|
* ccs_write_exception_policy - Write exception policy. |
1556 |
|
|
* |
1557 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1558 |
|
|
* |
1559 |
|
|
* Returns 0 on success, negative value otherwise. |
1560 |
|
|
*/ |
1561 |
|
|
static int ccs_write_exception_policy(struct ccs_io_buffer *head) |
1562 |
|
|
{ |
1563 |
|
|
char *data = head->write_buf; |
1564 |
kumaneko |
2892 |
bool is_delete = ccs_str_starts(&data, CCS_KEYWORD_DELETE); |
1565 |
|
|
if (ccs_str_starts(&data, CCS_KEYWORD_KEEP_DOMAIN)) |
1566 |
kumaneko |
2863 |
return ccs_write_domain_keeper_policy(data, false, is_delete); |
1567 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_NO_KEEP_DOMAIN)) |
1568 |
kumaneko |
2863 |
return ccs_write_domain_keeper_policy(data, true, is_delete); |
1569 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_INITIALIZE_DOMAIN)) |
1570 |
kumaneko |
2863 |
return ccs_write_domain_initializer_policy(data, false, |
1571 |
|
|
is_delete); |
1572 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_NO_INITIALIZE_DOMAIN)) |
1573 |
kumaneko |
2863 |
return ccs_write_domain_initializer_policy(data, true, |
1574 |
|
|
is_delete); |
1575 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_AGGREGATOR)) |
1576 |
kumaneko |
2863 |
return ccs_write_aggregator_policy(data, is_delete); |
1577 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_READ)) |
1578 |
kumaneko |
2863 |
return ccs_write_globally_readable_policy(data, is_delete); |
1579 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_ENV)) |
1580 |
kumaneko |
2863 |
return ccs_write_globally_usable_env_policy(data, is_delete); |
1581 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_FILE_PATTERN)) |
1582 |
kumaneko |
2863 |
return ccs_write_pattern_policy(data, is_delete); |
1583 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_PATH_GROUP)) |
1584 |
kumaneko |
2863 |
return ccs_write_path_group_policy(data, is_delete); |
1585 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_NUMBER_GROUP)) |
1586 |
kumaneko |
2863 |
return ccs_write_number_group_policy(data, is_delete); |
1587 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_DENY_REWRITE)) |
1588 |
kumaneko |
2863 |
return ccs_write_no_rewrite_policy(data, is_delete); |
1589 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_ADDRESS_GROUP)) |
1590 |
kumaneko |
2863 |
return ccs_write_address_group_policy(data, is_delete); |
1591 |
kumaneko |
2892 |
if (ccs_str_starts(&data, CCS_KEYWORD_DENY_AUTOBIND)) |
1592 |
kumaneko |
2863 |
return ccs_write_reserved_port_policy(data, is_delete); |
1593 |
|
|
return -EINVAL; |
1594 |
|
|
} |
1595 |
|
|
|
1596 |
|
|
/** |
1597 |
|
|
* ccs_read_exception_policy - Read exception policy. |
1598 |
|
|
* |
1599 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1600 |
|
|
* |
1601 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1602 |
|
|
* |
1603 |
|
|
* Caller holds ccs_read_lock(). |
1604 |
|
|
*/ |
1605 |
|
|
static int ccs_read_exception_policy(struct ccs_io_buffer *head) |
1606 |
|
|
{ |
1607 |
|
|
ccs_check_read_lock(); |
1608 |
|
|
if (!head->read_eof) { |
1609 |
|
|
switch (head->read_step) { |
1610 |
|
|
case 0: |
1611 |
|
|
head->read_var2 = NULL; |
1612 |
|
|
head->read_step = 1; |
1613 |
|
|
case 1: |
1614 |
|
|
if (!ccs_read_domain_keeper_policy(head)) |
1615 |
|
|
break; |
1616 |
|
|
head->read_var2 = NULL; |
1617 |
|
|
head->read_step = 2; |
1618 |
|
|
case 2: |
1619 |
|
|
if (!ccs_read_globally_readable_policy(head)) |
1620 |
|
|
break; |
1621 |
|
|
head->read_var2 = NULL; |
1622 |
|
|
head->read_step = 3; |
1623 |
|
|
case 3: |
1624 |
|
|
if (!ccs_read_globally_usable_env_policy(head)) |
1625 |
|
|
break; |
1626 |
|
|
head->read_var2 = NULL; |
1627 |
|
|
head->read_step = 4; |
1628 |
|
|
case 4: |
1629 |
|
|
if (!ccs_read_domain_initializer_policy(head)) |
1630 |
|
|
break; |
1631 |
|
|
head->read_var2 = NULL; |
1632 |
|
|
head->read_step = 6; |
1633 |
|
|
case 6: |
1634 |
|
|
if (!ccs_read_aggregator_policy(head)) |
1635 |
|
|
break; |
1636 |
|
|
head->read_var2 = NULL; |
1637 |
|
|
head->read_step = 7; |
1638 |
|
|
case 7: |
1639 |
|
|
if (!ccs_read_file_pattern(head)) |
1640 |
|
|
break; |
1641 |
|
|
head->read_var2 = NULL; |
1642 |
|
|
head->read_step = 8; |
1643 |
|
|
case 8: |
1644 |
|
|
if (!ccs_read_no_rewrite_policy(head)) |
1645 |
|
|
break; |
1646 |
|
|
head->read_var2 = NULL; |
1647 |
|
|
head->read_step = 9; |
1648 |
|
|
case 9: |
1649 |
|
|
if (!ccs_read_path_group_policy(head)) |
1650 |
|
|
break; |
1651 |
|
|
head->read_var1 = NULL; |
1652 |
|
|
head->read_var2 = NULL; |
1653 |
|
|
head->read_step = 10; |
1654 |
|
|
case 10: |
1655 |
|
|
if (!ccs_read_number_group_policy(head)) |
1656 |
|
|
break; |
1657 |
|
|
head->read_var1 = NULL; |
1658 |
|
|
head->read_var2 = NULL; |
1659 |
|
|
head->read_step = 11; |
1660 |
|
|
case 11: |
1661 |
|
|
if (!ccs_read_address_group_policy(head)) |
1662 |
|
|
break; |
1663 |
|
|
head->read_var2 = NULL; |
1664 |
|
|
head->read_step = 12; |
1665 |
|
|
case 12: |
1666 |
|
|
if (!ccs_read_reserved_port_policy(head)) |
1667 |
|
|
break; |
1668 |
|
|
head->read_eof = true; |
1669 |
|
|
break; |
1670 |
|
|
default: |
1671 |
|
|
return -EINVAL; |
1672 |
|
|
} |
1673 |
|
|
} |
1674 |
|
|
return 0; |
1675 |
|
|
} |
1676 |
|
|
|
1677 |
kumaneko |
2897 |
/** |
1678 |
|
|
* ccs_get_argv0 - Get argv[0]. |
1679 |
|
|
* |
1680 |
|
|
* @ee: Pointer to "struct ccs_execve_entry". |
1681 |
|
|
* |
1682 |
|
|
* Returns true on success, false otherwise. |
1683 |
|
|
*/ |
1684 |
|
|
static bool ccs_get_argv0(struct ccs_execve_entry *ee) |
1685 |
|
|
{ |
1686 |
|
|
struct linux_binprm *bprm = ee->bprm; |
1687 |
|
|
char *arg_ptr = ee->tmp; |
1688 |
|
|
int arg_len = 0; |
1689 |
|
|
unsigned long pos = bprm->p; |
1690 |
|
|
int offset = pos % PAGE_SIZE; |
1691 |
|
|
bool done = false; |
1692 |
|
|
if (!bprm->argc) |
1693 |
|
|
goto out; |
1694 |
|
|
while (1) { |
1695 |
|
|
if (!ccs_dump_page(bprm, pos, &ee->dump)) |
1696 |
|
|
goto out; |
1697 |
|
|
pos += PAGE_SIZE - offset; |
1698 |
|
|
/* Read. */ |
1699 |
|
|
while (offset < PAGE_SIZE) { |
1700 |
|
|
const char *kaddr = ee->dump.data; |
1701 |
|
|
const unsigned char c = kaddr[offset++]; |
1702 |
|
|
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
1703 |
|
|
if (c == '\\') { |
1704 |
|
|
arg_ptr[arg_len++] = '\\'; |
1705 |
|
|
arg_ptr[arg_len++] = '\\'; |
1706 |
|
|
} else if (c == '/') { |
1707 |
|
|
arg_len = 0; |
1708 |
|
|
} else if (c > ' ' && c < 127) { |
1709 |
|
|
arg_ptr[arg_len++] = c; |
1710 |
|
|
} else { |
1711 |
|
|
arg_ptr[arg_len++] = '\\'; |
1712 |
|
|
arg_ptr[arg_len++] = (c >> 6) + '0'; |
1713 |
|
|
arg_ptr[arg_len++] |
1714 |
|
|
= ((c >> 3) & 7) + '0'; |
1715 |
|
|
arg_ptr[arg_len++] = (c & 7) + '0'; |
1716 |
|
|
} |
1717 |
|
|
} else { |
1718 |
|
|
arg_ptr[arg_len] = '\0'; |
1719 |
|
|
done = true; |
1720 |
|
|
break; |
1721 |
|
|
} |
1722 |
|
|
} |
1723 |
|
|
offset = 0; |
1724 |
|
|
if (done) |
1725 |
|
|
break; |
1726 |
|
|
} |
1727 |
|
|
return true; |
1728 |
|
|
out: |
1729 |
|
|
return false; |
1730 |
|
|
} |
1731 |
|
|
|
1732 |
|
|
static struct ccs_condition *ccs_get_execute_condition(struct ccs_execve_entry |
1733 |
|
|
*ee) |
1734 |
|
|
{ |
1735 |
|
|
struct ccs_condition *cond; |
1736 |
|
|
char *buf; |
1737 |
|
|
int len = 256; |
1738 |
|
|
char *realpath = NULL; |
1739 |
|
|
char *argv0 = NULL; |
1740 |
|
|
if (ccs_check_flags(NULL, CCS_AUTOLEARN_EXEC_REALPATH)) { |
1741 |
|
|
struct file *file = ee->bprm->file; |
1742 |
|
|
realpath = ccs_realpath_from_dentry(file->f_dentry, |
1743 |
|
|
file->f_vfsmnt); |
1744 |
|
|
if (realpath) |
1745 |
|
|
len += strlen(realpath) + 17; |
1746 |
|
|
} |
1747 |
|
|
if (ccs_check_flags(NULL, CCS_AUTOLEARN_EXEC_REALPATH)) { |
1748 |
|
|
if (ccs_get_argv0(ee)) { |
1749 |
|
|
argv0 = ee->tmp; |
1750 |
|
|
len += strlen(argv0) + 16; |
1751 |
|
|
} |
1752 |
|
|
} |
1753 |
|
|
buf = kmalloc(len, GFP_KERNEL); |
1754 |
|
|
if (!buf) |
1755 |
|
|
return NULL; |
1756 |
|
|
snprintf(buf, len - 1, "if"); |
1757 |
|
|
if (current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER) { |
1758 |
|
|
const int pos = strlen(buf); |
1759 |
|
|
snprintf(buf + pos, len - pos - 1, |
1760 |
|
|
" task.type=execute_handler"); |
1761 |
|
|
} |
1762 |
|
|
if (realpath) { |
1763 |
|
|
const int pos = strlen(buf); |
1764 |
|
|
snprintf(buf + pos, len - pos - 1, " exec.realpath=\"%s\"", |
1765 |
|
|
realpath); |
1766 |
|
|
kfree(realpath); |
1767 |
|
|
} |
1768 |
|
|
if (argv0) { |
1769 |
|
|
const int pos = strlen(buf); |
1770 |
|
|
snprintf(buf + pos, len - pos - 1, " exec.argv[0]=\"%s\"", |
1771 |
|
|
argv0); |
1772 |
|
|
} |
1773 |
|
|
cond = ccs_get_condition(buf); |
1774 |
|
|
kfree(buf); |
1775 |
|
|
return cond; |
1776 |
|
|
} |
1777 |
|
|
|
1778 |
kumaneko |
2863 |
/* Wait queue for ccs_query_list. */ |
1779 |
|
|
static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait); |
1780 |
|
|
|
1781 |
|
|
/* Lock for manipulating ccs_query_list. */ |
1782 |
|
|
static DEFINE_SPINLOCK(ccs_query_list_lock); |
1783 |
|
|
|
1784 |
|
|
/* Structure for query. */ |
1785 |
|
|
struct ccs_query_entry { |
1786 |
|
|
struct list_head list; |
1787 |
|
|
char *query; |
1788 |
|
|
int query_len; |
1789 |
|
|
unsigned int serial; |
1790 |
|
|
int timer; |
1791 |
|
|
int answer; |
1792 |
|
|
}; |
1793 |
|
|
|
1794 |
|
|
/* The list for "struct ccs_query_entry". */ |
1795 |
|
|
static LIST_HEAD(ccs_query_list); |
1796 |
|
|
|
1797 |
|
|
/* Number of "struct file" referring /proc/ccs/query interface. */ |
1798 |
|
|
static atomic_t ccs_query_observers = ATOMIC_INIT(0); |
1799 |
|
|
|
1800 |
|
|
/** |
1801 |
|
|
* ccs_check_supervisor - Ask for the supervisor's decision. |
1802 |
|
|
* |
1803 |
|
|
* @r: Pointer to "struct ccs_request_info". |
1804 |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
1805 |
|
|
* |
1806 |
|
|
* Returns 0 if the supervisor decided to permit the access request which |
1807 |
|
|
* violated the policy in enforcing mode, 1 if the supervisor decided to |
1808 |
|
|
* retry the access request which violated the policy in enforcing mode, |
1809 |
kumaneko |
2897 |
* 0 if it is not in enforcing mode, -EPERM otherwise. |
1810 |
kumaneko |
2863 |
*/ |
1811 |
|
|
int ccs_check_supervisor(struct ccs_request_info *r, const char *fmt, ...) |
1812 |
|
|
{ |
1813 |
|
|
va_list args; |
1814 |
|
|
int error = -EPERM; |
1815 |
|
|
int pos; |
1816 |
|
|
int len; |
1817 |
|
|
static unsigned int ccs_serial; |
1818 |
|
|
struct ccs_query_entry *ccs_query_entry = NULL; |
1819 |
|
|
bool quota_exceeded = false; |
1820 |
|
|
char *header; |
1821 |
|
|
if (!r->domain) |
1822 |
|
|
r->domain = ccs_current_domain(); |
1823 |
kumaneko |
2897 |
switch (r->mode) { |
1824 |
|
|
char *buffer; |
1825 |
|
|
struct ccs_condition *cond; |
1826 |
|
|
case 1: |
1827 |
|
|
if (!ccs_domain_quota_ok(r)) |
1828 |
|
|
return 0; |
1829 |
|
|
va_start(args, fmt); |
1830 |
|
|
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4; |
1831 |
|
|
va_end(args); |
1832 |
|
|
buffer = kmalloc(len, GFP_KERNEL); |
1833 |
|
|
if (!buffer) |
1834 |
|
|
return 0; |
1835 |
|
|
va_start(args, fmt); |
1836 |
|
|
vsnprintf(buffer, len - 1, fmt, args); |
1837 |
|
|
va_end(args); |
1838 |
|
|
ccs_normalize_line(buffer); |
1839 |
|
|
if (r->ee && !strncmp(buffer, "allow_execute ", 14)) |
1840 |
|
|
cond = ccs_get_execute_condition(r->ee); |
1841 |
|
|
else if ((current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER)) { |
1842 |
|
|
char str[] = "if task.type=execute_handler"; |
1843 |
|
|
cond = ccs_get_condition(str); |
1844 |
|
|
} else |
1845 |
|
|
cond = NULL; |
1846 |
|
|
ccs_write_domain_policy2(buffer, r->domain, cond, false); |
1847 |
|
|
ccs_put_condition(cond); |
1848 |
|
|
kfree(buffer); |
1849 |
|
|
/* fall through */ |
1850 |
|
|
case 2: |
1851 |
|
|
return 0; |
1852 |
|
|
} |
1853 |
kumaneko |
2863 |
if (!atomic_read(&ccs_query_observers)) { |
1854 |
|
|
int i; |
1855 |
|
|
if (current->ccs_flags & CCS_DONT_SLEEP_ON_ENFORCE_ERROR) |
1856 |
|
|
return -EPERM; |
1857 |
|
|
for (i = 0; i < ccs_check_flags(r->domain, CCS_SLEEP_PERIOD); |
1858 |
|
|
i++) { |
1859 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
1860 |
|
|
schedule_timeout(HZ / 10); |
1861 |
|
|
} |
1862 |
|
|
return -EPERM; |
1863 |
|
|
} |
1864 |
|
|
va_start(args, fmt); |
1865 |
|
|
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; |
1866 |
|
|
va_end(args); |
1867 |
|
|
header = ccs_init_audit_log(&len, r); |
1868 |
|
|
if (!header) |
1869 |
|
|
goto out; |
1870 |
|
|
ccs_query_entry = kzalloc(sizeof(*ccs_query_entry), GFP_KERNEL); |
1871 |
|
|
if (!ccs_query_entry) |
1872 |
|
|
goto out; |
1873 |
kumaneko |
2900 |
len = ccs_round2(len); |
1874 |
kumaneko |
2863 |
ccs_query_entry->query = kzalloc(len, GFP_KERNEL); |
1875 |
|
|
if (!ccs_query_entry->query) |
1876 |
|
|
goto out; |
1877 |
|
|
INIT_LIST_HEAD(&ccs_query_entry->list); |
1878 |
|
|
/***** CRITICAL SECTION START *****/ |
1879 |
|
|
spin_lock(&ccs_query_list_lock); |
1880 |
|
|
if (ccs_quota_for_query && ccs_query_memory_size + len + |
1881 |
|
|
sizeof(*ccs_query_entry) >= ccs_quota_for_query) { |
1882 |
|
|
quota_exceeded = true; |
1883 |
|
|
} else { |
1884 |
|
|
ccs_query_memory_size += len + sizeof(*ccs_query_entry); |
1885 |
|
|
ccs_query_entry->serial = ccs_serial++; |
1886 |
|
|
} |
1887 |
|
|
spin_unlock(&ccs_query_list_lock); |
1888 |
|
|
/***** CRITICAL SECTION END *****/ |
1889 |
|
|
if (quota_exceeded) |
1890 |
|
|
goto out; |
1891 |
|
|
pos = snprintf(ccs_query_entry->query, len - 1, "Q%u-%hu\n%s", |
1892 |
|
|
ccs_query_entry->serial, r->retry, header); |
1893 |
|
|
kfree(header); |
1894 |
|
|
header = NULL; |
1895 |
|
|
va_start(args, fmt); |
1896 |
|
|
vsnprintf(ccs_query_entry->query + pos, len - 1 - pos, fmt, args); |
1897 |
|
|
ccs_query_entry->query_len = strlen(ccs_query_entry->query) + 1; |
1898 |
|
|
va_end(args); |
1899 |
|
|
/***** CRITICAL SECTION START *****/ |
1900 |
|
|
spin_lock(&ccs_query_list_lock); |
1901 |
|
|
list_add_tail(&ccs_query_entry->list, &ccs_query_list); |
1902 |
|
|
spin_unlock(&ccs_query_list_lock); |
1903 |
|
|
/***** CRITICAL SECTION END *****/ |
1904 |
|
|
/* Give 10 seconds for supervisor's opinion. */ |
1905 |
|
|
for (ccs_query_entry->timer = 0; |
1906 |
|
|
atomic_read(&ccs_query_observers) && ccs_query_entry->timer < 100; |
1907 |
|
|
ccs_query_entry->timer++) { |
1908 |
|
|
wake_up(&ccs_query_wait); |
1909 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
1910 |
|
|
schedule_timeout(HZ / 10); |
1911 |
|
|
if (ccs_query_entry->answer) |
1912 |
|
|
break; |
1913 |
|
|
} |
1914 |
|
|
/***** CRITICAL SECTION START *****/ |
1915 |
|
|
spin_lock(&ccs_query_list_lock); |
1916 |
|
|
list_del(&ccs_query_entry->list); |
1917 |
|
|
ccs_query_memory_size -= len + sizeof(*ccs_query_entry); |
1918 |
|
|
spin_unlock(&ccs_query_list_lock); |
1919 |
|
|
/***** CRITICAL SECTION END *****/ |
1920 |
|
|
switch (ccs_query_entry->answer) { |
1921 |
|
|
case 3: /* Asked to retry by administrator. */ |
1922 |
|
|
error = 1; |
1923 |
|
|
r->retry++; |
1924 |
|
|
break; |
1925 |
|
|
case 1: |
1926 |
|
|
/* Granted by administrator. */ |
1927 |
|
|
error = 0; |
1928 |
|
|
break; |
1929 |
|
|
case 0: |
1930 |
|
|
/* Timed out. */ |
1931 |
|
|
break; |
1932 |
|
|
default: |
1933 |
|
|
/* Rejected by administrator. */ |
1934 |
|
|
break; |
1935 |
|
|
} |
1936 |
|
|
out: |
1937 |
|
|
if (ccs_query_entry) |
1938 |
|
|
kfree(ccs_query_entry->query); |
1939 |
|
|
kfree(ccs_query_entry); |
1940 |
|
|
kfree(header); |
1941 |
|
|
return error; |
1942 |
|
|
} |
1943 |
|
|
|
1944 |
|
|
/** |
1945 |
|
|
* ccs_poll_query - poll() for /proc/ccs/query. |
1946 |
|
|
* |
1947 |
|
|
* @file: Pointer to "struct file". |
1948 |
|
|
* @wait: Pointer to "poll_table". |
1949 |
|
|
* |
1950 |
|
|
* Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
1951 |
|
|
* |
1952 |
|
|
* Waits for access requests which violated policy in enforcing mode. |
1953 |
|
|
*/ |
1954 |
|
|
static int ccs_poll_query(struct file *file, poll_table *wait) |
1955 |
|
|
{ |
1956 |
|
|
struct list_head *tmp; |
1957 |
|
|
bool found = false; |
1958 |
|
|
u8 i; |
1959 |
|
|
for (i = 0; i < 2; i++) { |
1960 |
|
|
/***** CRITICAL SECTION START *****/ |
1961 |
|
|
spin_lock(&ccs_query_list_lock); |
1962 |
|
|
list_for_each(tmp, &ccs_query_list) { |
1963 |
|
|
struct ccs_query_entry *ptr |
1964 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
1965 |
|
|
if (ptr->answer) |
1966 |
|
|
continue; |
1967 |
|
|
found = true; |
1968 |
|
|
break; |
1969 |
|
|
} |
1970 |
|
|
spin_unlock(&ccs_query_list_lock); |
1971 |
|
|
/***** CRITICAL SECTION END *****/ |
1972 |
|
|
if (found) |
1973 |
|
|
return POLLIN | POLLRDNORM; |
1974 |
|
|
if (i) |
1975 |
|
|
break; |
1976 |
|
|
poll_wait(file, &ccs_query_wait, wait); |
1977 |
|
|
} |
1978 |
|
|
return 0; |
1979 |
|
|
} |
1980 |
|
|
|
1981 |
|
|
/** |
1982 |
|
|
* ccs_read_query - Read access requests which violated policy in enforcing mode. |
1983 |
|
|
* |
1984 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1985 |
|
|
* |
1986 |
|
|
* Returns 0. |
1987 |
|
|
*/ |
1988 |
|
|
static int ccs_read_query(struct ccs_io_buffer *head) |
1989 |
|
|
{ |
1990 |
|
|
struct list_head *tmp; |
1991 |
|
|
int pos = 0; |
1992 |
|
|
int len = 0; |
1993 |
|
|
char *buf; |
1994 |
|
|
if (head->read_avail) |
1995 |
|
|
return 0; |
1996 |
|
|
if (head->read_buf) { |
1997 |
|
|
kfree(head->read_buf); |
1998 |
|
|
head->read_buf = NULL; |
1999 |
|
|
head->readbuf_size = 0; |
2000 |
|
|
} |
2001 |
|
|
/***** CRITICAL SECTION START *****/ |
2002 |
|
|
spin_lock(&ccs_query_list_lock); |
2003 |
|
|
list_for_each(tmp, &ccs_query_list) { |
2004 |
|
|
struct ccs_query_entry *ptr |
2005 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
2006 |
|
|
if (ptr->answer) |
2007 |
|
|
continue; |
2008 |
|
|
if (pos++ != head->read_step) |
2009 |
|
|
continue; |
2010 |
|
|
len = ptr->query_len; |
2011 |
|
|
break; |
2012 |
|
|
} |
2013 |
|
|
spin_unlock(&ccs_query_list_lock); |
2014 |
|
|
/***** CRITICAL SECTION END *****/ |
2015 |
|
|
if (!len) { |
2016 |
|
|
head->read_step = 0; |
2017 |
|
|
return 0; |
2018 |
|
|
} |
2019 |
|
|
buf = kzalloc(len, GFP_KERNEL); |
2020 |
|
|
if (!buf) |
2021 |
|
|
return 0; |
2022 |
|
|
pos = 0; |
2023 |
|
|
/***** CRITICAL SECTION START *****/ |
2024 |
|
|
spin_lock(&ccs_query_list_lock); |
2025 |
|
|
list_for_each(tmp, &ccs_query_list) { |
2026 |
|
|
struct ccs_query_entry *ptr |
2027 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
2028 |
|
|
if (ptr->answer) |
2029 |
|
|
continue; |
2030 |
|
|
if (pos++ != head->read_step) |
2031 |
|
|
continue; |
2032 |
|
|
/* |
2033 |
|
|
* Some query can be skipped because ccs_query_list |
2034 |
|
|
* can change, but I don't care. |
2035 |
|
|
*/ |
2036 |
|
|
if (len == ptr->query_len) |
2037 |
|
|
memmove(buf, ptr->query, len); |
2038 |
|
|
break; |
2039 |
|
|
} |
2040 |
|
|
spin_unlock(&ccs_query_list_lock); |
2041 |
|
|
/***** CRITICAL SECTION END *****/ |
2042 |
|
|
if (buf[0]) { |
2043 |
|
|
head->read_avail = len; |
2044 |
|
|
head->readbuf_size = head->read_avail; |
2045 |
|
|
head->read_buf = buf; |
2046 |
|
|
head->read_step++; |
2047 |
|
|
} else { |
2048 |
|
|
kfree(buf); |
2049 |
|
|
} |
2050 |
|
|
return 0; |
2051 |
|
|
} |
2052 |
|
|
|
2053 |
|
|
/** |
2054 |
|
|
* ccs_write_answer - Write the supervisor's decision. |
2055 |
|
|
* |
2056 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
2057 |
|
|
* |
2058 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
2059 |
|
|
*/ |
2060 |
|
|
static int ccs_write_answer(struct ccs_io_buffer *head) |
2061 |
|
|
{ |
2062 |
|
|
char *data = head->write_buf; |
2063 |
|
|
struct list_head *tmp; |
2064 |
|
|
unsigned int serial; |
2065 |
|
|
unsigned int answer; |
2066 |
|
|
/***** CRITICAL SECTION START *****/ |
2067 |
|
|
spin_lock(&ccs_query_list_lock); |
2068 |
|
|
list_for_each(tmp, &ccs_query_list) { |
2069 |
|
|
struct ccs_query_entry *ptr |
2070 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
2071 |
|
|
ptr->timer = 0; |
2072 |
|
|
} |
2073 |
|
|
spin_unlock(&ccs_query_list_lock); |
2074 |
|
|
/***** CRITICAL SECTION END *****/ |
2075 |
|
|
if (sscanf(data, "A%u=%u", &serial, &answer) != 2) |
2076 |
|
|
return -EINVAL; |
2077 |
|
|
/***** CRITICAL SECTION START *****/ |
2078 |
|
|
spin_lock(&ccs_query_list_lock); |
2079 |
|
|
list_for_each(tmp, &ccs_query_list) { |
2080 |
|
|
struct ccs_query_entry *ptr |
2081 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
2082 |
|
|
if (ptr->serial != serial) |
2083 |
|
|
continue; |
2084 |
|
|
if (!ptr->answer) |
2085 |
|
|
ptr->answer = answer; |
2086 |
|
|
break; |
2087 |
|
|
} |
2088 |
|
|
spin_unlock(&ccs_query_list_lock); |
2089 |
|
|
/***** CRITICAL SECTION END *****/ |
2090 |
|
|
return 0; |
2091 |
|
|
} |
2092 |
|
|
|
2093 |
|
|
/** |
2094 |
|
|
* ccs_read_version: Get version. |
2095 |
|
|
* |
2096 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
2097 |
|
|
* |
2098 |
|
|
* Returns version information. |
2099 |
|
|
*/ |
2100 |
|
|
static int ccs_read_version(struct ccs_io_buffer *head) |
2101 |
|
|
{ |
2102 |
|
|
if (!head->read_eof) { |
2103 |
|
|
ccs_io_printf(head, "1.7.0-pre"); |
2104 |
|
|
head->read_eof = true; |
2105 |
|
|
} |
2106 |
|
|
return 0; |
2107 |
|
|
} |
2108 |
|
|
|
2109 |
|
|
/** |
2110 |
|
|
* ccs_read_self_domain - Get the current process's domainname. |
2111 |
|
|
* |
2112 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
2113 |
|
|
* |
2114 |
|
|
* Returns the current process's domainname. |
2115 |
|
|
*/ |
2116 |
|
|
static int ccs_read_self_domain(struct ccs_io_buffer *head) |
2117 |
|
|
{ |
2118 |
|
|
if (!head->read_eof) { |
2119 |
|
|
/* |
2120 |
|
|
* ccs_current_domain()->domainname != NULL |
2121 |
|
|
* because every process belongs to a domain and |
2122 |
|
|
* the domain's name cannot be NULL. |
2123 |
|
|
*/ |
2124 |
|
|
ccs_io_printf(head, "%s", |
2125 |
|
|
ccs_current_domain()->domainname->name); |
2126 |
|
|
head->read_eof = true; |
2127 |
|
|
} |
2128 |
|
|
return 0; |
2129 |
|
|
} |
2130 |
|
|
|
2131 |
|
|
/** |
2132 |
|
|
* ccs_open_control - open() for /proc/ccs/ interface. |
2133 |
|
|
* |
2134 |
|
|
* @type: Type of interface. |
2135 |
|
|
* @file: Pointer to "struct file". |
2136 |
|
|
* |
2137 |
|
|
* Associates policy handler and returns 0 on success, -ENOMEM otherwise. |
2138 |
|
|
*/ |
2139 |
|
|
int ccs_open_control(const u8 type, struct file *file) |
2140 |
|
|
{ |
2141 |
|
|
struct ccs_io_buffer *head = kzalloc(sizeof(*head), GFP_KERNEL); |
2142 |
|
|
if (!head) |
2143 |
|
|
return -ENOMEM; |
2144 |
|
|
mutex_init(&head->io_sem); |
2145 |
|
|
head->type = type; |
2146 |
|
|
switch (type) { |
2147 |
|
|
case CCS_DOMAINPOLICY: /* /proc/ccs/domain_policy */ |
2148 |
|
|
head->write = ccs_write_domain_policy; |
2149 |
|
|
head->read = ccs_read_domain_policy; |
2150 |
|
|
break; |
2151 |
|
|
case CCS_EXCEPTIONPOLICY: /* /proc/ccs/exception_policy */ |
2152 |
|
|
head->write = ccs_write_exception_policy; |
2153 |
|
|
head->read = ccs_read_exception_policy; |
2154 |
|
|
break; |
2155 |
|
|
#ifdef CONFIG_CCSECURITY_AUDIT |
2156 |
|
|
case CCS_GRANTLOG: /* /proc/ccs/grant_log */ |
2157 |
|
|
head->poll = ccs_poll_grant_log; |
2158 |
|
|
head->read = ccs_read_grant_log; |
2159 |
|
|
break; |
2160 |
|
|
case CCS_REJECTLOG: /* /proc/ccs/reject_log */ |
2161 |
|
|
head->poll = ccs_poll_reject_log; |
2162 |
|
|
head->read = ccs_read_reject_log; |
2163 |
|
|
break; |
2164 |
|
|
#endif |
2165 |
|
|
case CCS_SELFDOMAIN: /* /proc/ccs/self_domain */ |
2166 |
|
|
head->read = ccs_read_self_domain; |
2167 |
|
|
break; |
2168 |
|
|
case CCS_DOMAIN_STATUS: /* /proc/ccs/.domain_status */ |
2169 |
|
|
head->write = ccs_write_domain_profile; |
2170 |
|
|
head->read = ccs_read_domain_profile; |
2171 |
|
|
break; |
2172 |
|
|
case CCS_EXECUTE_HANDLER: /* /proc/ccs/.execute_handler */ |
2173 |
|
|
/* Allow execute_handler to read process's status. */ |
2174 |
|
|
if (!(current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER)) { |
2175 |
|
|
kfree(head); |
2176 |
|
|
return -EPERM; |
2177 |
|
|
} |
2178 |
|
|
/* fall through */ |
2179 |
|
|
case CCS_PROCESS_STATUS: /* /proc/ccs/.process_status */ |
2180 |
|
|
head->write = ccs_write_pid; |
2181 |
|
|
head->read = ccs_read_pid; |
2182 |
|
|
break; |
2183 |
|
|
case CCS_VERSION: /* /proc/ccs/version */ |
2184 |
|
|
head->read = ccs_read_version; |
2185 |
|
|
head->readbuf_size = 128; |
2186 |
|
|
break; |
2187 |
|
|
case CCS_MEMINFO: /* /proc/ccs/meminfo */ |
2188 |
|
|
head->write = ccs_write_memory_quota; |
2189 |
|
|
head->read = ccs_read_memory_counter; |
2190 |
|
|
head->readbuf_size = 512; |
2191 |
|
|
break; |
2192 |
|
|
case CCS_PROFILE: /* /proc/ccs/profile */ |
2193 |
|
|
head->write = ccs_write_profile; |
2194 |
|
|
head->read = ccs_read_profile; |
2195 |
|
|
break; |
2196 |
|
|
case CCS_QUERY: /* /proc/ccs/query */ |
2197 |
|
|
head->poll = ccs_poll_query; |
2198 |
|
|
head->write = ccs_write_answer; |
2199 |
|
|
head->read = ccs_read_query; |
2200 |
|
|
break; |
2201 |
|
|
case CCS_MANAGER: /* /proc/ccs/manager */ |
2202 |
|
|
head->write = ccs_write_manager_policy; |
2203 |
|
|
head->read = ccs_read_manager_policy; |
2204 |
|
|
break; |
2205 |
|
|
} |
2206 |
|
|
if (!(file->f_mode & FMODE_READ)) { |
2207 |
|
|
/* |
2208 |
|
|
* No need to allocate read_buf since it is not opened |
2209 |
|
|
* for reading. |
2210 |
|
|
*/ |
2211 |
|
|
head->read = NULL; |
2212 |
|
|
head->poll = NULL; |
2213 |
|
|
} else if (type != CCS_QUERY && |
2214 |
|
|
type != CCS_GRANTLOG && type != CCS_REJECTLOG) { |
2215 |
|
|
/* |
2216 |
|
|
* Don't allocate buffer for reading if the file is one of |
2217 |
|
|
* /proc/ccs/grant_log , /proc/ccs/reject_log , /proc/ccs/query. |
2218 |
|
|
*/ |
2219 |
|
|
if (!head->readbuf_size) |
2220 |
|
|
head->readbuf_size = 4096 * 2; |
2221 |
|
|
head->read_buf = kzalloc(head->readbuf_size, GFP_KERNEL); |
2222 |
|
|
if (!head->read_buf) { |
2223 |
|
|
kfree(head); |
2224 |
|
|
return -ENOMEM; |
2225 |
|
|
} |
2226 |
|
|
} |
2227 |
|
|
if (!(file->f_mode & FMODE_WRITE)) { |
2228 |
|
|
/* |
2229 |
|
|
* No need to allocate write_buf since it is not opened |
2230 |
|
|
* for writing. |
2231 |
|
|
*/ |
2232 |
|
|
head->write = NULL; |
2233 |
|
|
} else if (head->write) { |
2234 |
|
|
head->writebuf_size = 4096 * 2; |
2235 |
|
|
head->write_buf = kzalloc(head->writebuf_size, GFP_KERNEL); |
2236 |
|
|
if (!head->write_buf) { |
2237 |
|
|
kfree(head->read_buf); |
2238 |
|
|
kfree(head); |
2239 |
|
|
return -ENOMEM; |
2240 |
|
|
} |
2241 |
|
|
} |
2242 |
|
|
if (type != CCS_QUERY && |
2243 |
|
|
type != CCS_GRANTLOG && type != CCS_REJECTLOG) |
2244 |
|
|
head->reader_idx = ccs_read_lock(); |
2245 |
|
|
file->private_data = head; |
2246 |
|
|
/* |
2247 |
|
|
* Call the handler now if the file is /proc/ccs/self_domain |
2248 |
|
|
* so that the user can use "cat < /proc/ccs/self_domain" to |
2249 |
|
|
* know the current process's domainname. |
2250 |
|
|
*/ |
2251 |
|
|
if (type == CCS_SELFDOMAIN) |
2252 |
|
|
ccs_read_control(file, NULL, 0); |
2253 |
|
|
/* |
2254 |
|
|
* If the file is /proc/ccs/query , increment the observer counter. |
2255 |
|
|
* The obserber counter is used by ccs_check_supervisor() to see if |
2256 |
|
|
* there is some process monitoring /proc/ccs/query. |
2257 |
|
|
*/ |
2258 |
|
|
else if (type == CCS_QUERY) |
2259 |
|
|
atomic_inc(&ccs_query_observers); |
2260 |
|
|
return 0; |
2261 |
|
|
} |
2262 |
|
|
|
2263 |
|
|
/** |
2264 |
|
|
* ccs_poll_control - poll() for /proc/ccs/ interface. |
2265 |
|
|
* |
2266 |
|
|
* @file: Pointer to "struct file". |
2267 |
|
|
* @wait: Pointer to "poll_table". |
2268 |
|
|
* |
2269 |
|
|
* Waits for read readiness. |
2270 |
|
|
* /proc/ccs/query is handled by /usr/lib/ccs/ccs-queryd and |
2271 |
|
|
* /proc/ccs/grant_log and /proc/ccs/reject_log are handled by |
2272 |
|
|
* /usr/lib/ccs/ccs-auditd. |
2273 |
|
|
*/ |
2274 |
|
|
int ccs_poll_control(struct file *file, poll_table *wait) |
2275 |
|
|
{ |
2276 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2277 |
|
|
if (!head->poll) |
2278 |
|
|
return -ENOSYS; |
2279 |
|
|
return head->poll(file, wait); |
2280 |
|
|
} |
2281 |
|
|
|
2282 |
|
|
/** |
2283 |
|
|
* ccs_read_control - read() for /proc/ccs/ interface. |
2284 |
|
|
* |
2285 |
|
|
* @file: Pointer to "struct file". |
2286 |
|
|
* @buffer: Poiner to buffer to write to. |
2287 |
|
|
* @buffer_len: Size of @buffer. |
2288 |
|
|
* |
2289 |
|
|
* Returns bytes read on success, negative value otherwise. |
2290 |
|
|
*/ |
2291 |
|
|
int ccs_read_control(struct file *file, char __user *buffer, |
2292 |
|
|
const int buffer_len) |
2293 |
|
|
{ |
2294 |
|
|
int len = 0; |
2295 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2296 |
|
|
char *cp; |
2297 |
|
|
if (!head->read) |
2298 |
|
|
return -ENOSYS; |
2299 |
|
|
if (!access_ok(VERIFY_WRITE, buffer, buffer_len)) |
2300 |
|
|
return -EFAULT; |
2301 |
|
|
if (mutex_lock_interruptible(&head->io_sem)) |
2302 |
|
|
return -EINTR; |
2303 |
|
|
/* Call the policy handler. */ |
2304 |
|
|
len = head->read(head); |
2305 |
|
|
if (len < 0) |
2306 |
|
|
goto out; |
2307 |
|
|
/* Write to buffer. */ |
2308 |
|
|
len = head->read_avail; |
2309 |
|
|
if (len > buffer_len) |
2310 |
|
|
len = buffer_len; |
2311 |
|
|
if (!len) |
2312 |
|
|
goto out; |
2313 |
|
|
/* head->read_buf changes by some functions. */ |
2314 |
|
|
cp = head->read_buf; |
2315 |
|
|
if (copy_to_user(buffer, cp, len)) { |
2316 |
|
|
len = -EFAULT; |
2317 |
|
|
goto out; |
2318 |
|
|
} |
2319 |
|
|
head->read_avail -= len; |
2320 |
|
|
memmove(cp, cp + len, head->read_avail); |
2321 |
|
|
out: |
2322 |
|
|
mutex_unlock(&head->io_sem); |
2323 |
|
|
return len; |
2324 |
|
|
} |
2325 |
|
|
|
2326 |
|
|
/** |
2327 |
|
|
* ccs_write_control - write() for /proc/ccs/ interface. |
2328 |
|
|
* |
2329 |
|
|
* @file: Pointer to "struct file". |
2330 |
|
|
* @buffer: Pointer to buffer to read from. |
2331 |
|
|
* @buffer_len: Size of @buffer. |
2332 |
|
|
* |
2333 |
|
|
* Returns @buffer_len on success, negative value otherwise. |
2334 |
|
|
*/ |
2335 |
|
|
int ccs_write_control(struct file *file, const char __user *buffer, |
2336 |
|
|
const int buffer_len) |
2337 |
|
|
{ |
2338 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2339 |
|
|
int error = buffer_len; |
2340 |
|
|
int avail_len = buffer_len; |
2341 |
|
|
char *cp0 = head->write_buf; |
2342 |
|
|
if (!head->write) |
2343 |
|
|
return -ENOSYS; |
2344 |
|
|
if (!access_ok(VERIFY_READ, buffer, buffer_len)) |
2345 |
|
|
return -EFAULT; |
2346 |
|
|
/* Don't allow updating policies by non manager programs. */ |
2347 |
|
|
if (head->write != ccs_write_pid && |
2348 |
|
|
head->write != ccs_write_domain_policy && |
2349 |
|
|
!ccs_is_policy_manager()) |
2350 |
|
|
return -EPERM; |
2351 |
|
|
if (mutex_lock_interruptible(&head->io_sem)) |
2352 |
|
|
return -EINTR; |
2353 |
|
|
/* Read a line and dispatch it to the policy handler. */ |
2354 |
|
|
while (avail_len > 0) { |
2355 |
|
|
char c; |
2356 |
|
|
if (head->write_avail >= head->writebuf_size - 1) { |
2357 |
|
|
error = -ENOMEM; |
2358 |
|
|
break; |
2359 |
|
|
} else if (get_user(c, buffer)) { |
2360 |
|
|
error = -EFAULT; |
2361 |
|
|
break; |
2362 |
|
|
} |
2363 |
|
|
buffer++; |
2364 |
|
|
avail_len--; |
2365 |
|
|
cp0[head->write_avail++] = c; |
2366 |
|
|
if (c != '\n') |
2367 |
|
|
continue; |
2368 |
|
|
cp0[head->write_avail - 1] = '\0'; |
2369 |
|
|
head->write_avail = 0; |
2370 |
|
|
ccs_normalize_line(cp0); |
2371 |
|
|
head->write(head); |
2372 |
|
|
} |
2373 |
|
|
mutex_unlock(&head->io_sem); |
2374 |
|
|
return error; |
2375 |
|
|
} |
2376 |
|
|
|
2377 |
|
|
/** |
2378 |
|
|
* ccs_close_control - close() for /proc/ccs/ interface. |
2379 |
|
|
* |
2380 |
|
|
* @file: Pointer to "struct file". |
2381 |
|
|
* |
2382 |
|
|
* Releases memory and returns 0. |
2383 |
|
|
*/ |
2384 |
|
|
int ccs_close_control(struct file *file) |
2385 |
|
|
{ |
2386 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2387 |
|
|
const bool is_write = head->write_buf != NULL; |
2388 |
|
|
const u8 type = head->type; |
2389 |
|
|
/* |
2390 |
|
|
* If the file is /proc/ccs/query , decrement the observer counter. |
2391 |
|
|
*/ |
2392 |
|
|
if (type == CCS_QUERY) |
2393 |
|
|
atomic_dec(&ccs_query_observers); |
2394 |
|
|
if (type != CCS_QUERY && |
2395 |
|
|
type != CCS_GRANTLOG && type != CCS_REJECTLOG) |
2396 |
|
|
ccs_read_unlock(head->reader_idx); |
2397 |
|
|
/* Release memory used for policy I/O. */ |
2398 |
|
|
kfree(head->read_buf); |
2399 |
|
|
head->read_buf = NULL; |
2400 |
|
|
kfree(head->write_buf); |
2401 |
|
|
head->write_buf = NULL; |
2402 |
|
|
kfree(head); |
2403 |
|
|
head = NULL; |
2404 |
|
|
file->private_data = NULL; |
2405 |
|
|
if (is_write) |
2406 |
|
|
ccs_run_gc(); |
2407 |
|
|
return 0; |
2408 |
|
|
} |