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kumaneko |
2863 |
/* |
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kumaneko |
2864 |
* security/ccsecurity/policy_io.c |
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kumaneko |
2863 |
* |
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* Copyright (C) 2005-2009 NTT DATA CORPORATION |
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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" |
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/* Lock for protecting ccs_profile->comment */ |
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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" |
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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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[CCS_MAC_FOR_IOCTL] = { "MAC_FOR_IOCTL", 0, 3 }, |
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kumaneko |
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[CCS_MAC_FOR_FILEATTR] = { "MAC_FOR_FILEATTR", 0, 3 }, |
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kumaneko |
2863 |
[CCS_MAC_FOR_ARGV0] = { "MAC_FOR_ARGV0", 0, 3 }, |
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[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 */ |
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}; |
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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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/** |
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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; |
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} |
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/** |
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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. |
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* |
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* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
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*/ |
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struct ccs_profile *ccs_find_or_assign_new_profile(const unsigned int |
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profile) |
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{ |
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struct ccs_profile *ptr; |
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struct ccs_profile *entry; |
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int i; |
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if (profile >= MAX_PROFILES) |
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return NULL; |
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ptr = ccs_profile_ptr[profile]; |
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if (ptr) |
120 |
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return ptr; |
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entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
122 |
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mutex_lock(&ccs_policy_lock); |
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ptr = ccs_profile_ptr[profile]; |
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if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
125 |
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ptr = entry; |
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for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) |
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ptr->value[i] = ccs_control_array[i].current_value; |
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/* |
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* Needn't to initialize "ptr->capability_value" |
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* because they are always 0. |
131 |
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*/ |
132 |
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mb(); /* Avoid out-of-order execution. */ |
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ccs_profile_ptr[profile] = ptr; |
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entry = NULL; |
135 |
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} |
136 |
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mutex_unlock(&ccs_policy_lock); |
137 |
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kfree(entry); |
138 |
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return ptr; |
139 |
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} |
140 |
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141 |
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/** |
142 |
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* ccs_write_profile - Write profile table. |
143 |
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* |
144 |
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* @head: Pointer to "struct ccs_io_buffer". |
145 |
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* |
146 |
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* Returns 0 on success, negative value otherwise. |
147 |
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*/ |
148 |
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static int ccs_write_profile(struct ccs_io_buffer *head) |
149 |
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{ |
150 |
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char *data = head->write_buf; |
151 |
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unsigned int i; |
152 |
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unsigned int value; |
153 |
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char *cp; |
154 |
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struct ccs_profile *ccs_profile; |
155 |
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i = simple_strtoul(data, &cp, 10); |
156 |
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if (data != cp) { |
157 |
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if (*cp != '-') |
158 |
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return -EINVAL; |
159 |
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data = cp + 1; |
160 |
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} |
161 |
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ccs_profile = ccs_find_or_assign_new_profile(i); |
162 |
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if (!ccs_profile) |
163 |
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return -EINVAL; |
164 |
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cp = strchr(data, '='); |
165 |
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if (!cp) |
166 |
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return -EINVAL; |
167 |
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*cp = '\0'; |
168 |
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if (!strcmp(data, "COMMENT")) { |
169 |
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const struct ccs_path_info *new_comment |
170 |
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= ccs_get_name(cp + 1); |
171 |
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const struct ccs_path_info *old_comment; |
172 |
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/* Protect reader from ccs_put_name(). */ |
173 |
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/***** CRITICAL SECTION START *****/ |
174 |
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spin_lock(&ccs_profile_comment_lock); |
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old_comment = ccs_profile->comment; |
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ccs_profile->comment = new_comment; |
177 |
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spin_unlock(&ccs_profile_comment_lock); |
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/***** CRITICAL SECTION END *****/ |
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ccs_put_name(old_comment); |
180 |
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ccs_profile_entry_used[0] = true; |
181 |
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return 0; |
182 |
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} |
183 |
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if (ccs_str_starts(&data, KEYWORD_MAC_FOR_CAPABILITY)) { |
184 |
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if (sscanf(cp + 1, "%u", &value) != 1) { |
185 |
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for (i = 0; i < 4; i++) { |
186 |
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if (strcmp(cp + 1, ccs_mode_4[i])) |
187 |
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continue; |
188 |
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value = i; |
189 |
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break; |
190 |
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} |
191 |
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if (i == 4) |
192 |
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return -EINVAL; |
193 |
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} |
194 |
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if (value > 3) |
195 |
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value = 3; |
196 |
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for (i = 0; i < CCS_MAX_CAPABILITY_INDEX; i++) { |
197 |
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if (strcmp(data, ccs_capability_control_keyword[i])) |
198 |
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continue; |
199 |
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ccs_profile->capability_value[i] = value; |
200 |
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ccs_profile_entry_used[i + 1 + CCS_MAX_CONTROL_INDEX] |
201 |
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= true; |
202 |
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return 0; |
203 |
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} |
204 |
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return -EINVAL; |
205 |
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} |
206 |
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for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) { |
207 |
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if (strcmp(data, ccs_control_array[i].keyword)) |
208 |
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continue; |
209 |
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if (sscanf(cp + 1, "%u", &value) != 1) { |
210 |
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int j; |
211 |
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const char **modes; |
212 |
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switch (i) { |
213 |
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case CCS_RESTRICT_AUTOBIND: |
214 |
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case CCS_VERBOSE: |
215 |
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modes = ccs_mode_2; |
216 |
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break; |
217 |
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default: |
218 |
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modes = ccs_mode_4; |
219 |
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break; |
220 |
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} |
221 |
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for (j = 0; j < 4; j++) { |
222 |
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if (strcmp(cp + 1, modes[j])) |
223 |
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continue; |
224 |
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value = j; |
225 |
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break; |
226 |
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} |
227 |
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if (j == 4) |
228 |
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return -EINVAL; |
229 |
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} else if (value > ccs_control_array[i].max_value) { |
230 |
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value = ccs_control_array[i].max_value; |
231 |
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} |
232 |
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ccs_profile->value[i] = value; |
233 |
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ccs_profile_entry_used[i + 1] = true; |
234 |
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return 0; |
235 |
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} |
236 |
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return -EINVAL; |
237 |
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} |
238 |
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239 |
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/** |
240 |
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* ccs_read_profile - Read profile table. |
241 |
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* |
242 |
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* @head: Pointer to "struct ccs_io_buffer". |
243 |
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* |
244 |
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* Returns 0. |
245 |
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*/ |
246 |
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static int ccs_read_profile(struct ccs_io_buffer *head) |
247 |
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{ |
248 |
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static const int ccs_total |
249 |
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= CCS_MAX_CONTROL_INDEX + CCS_MAX_CAPABILITY_INDEX + 1; |
250 |
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int step; |
251 |
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if (head->read_eof) |
252 |
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return 0; |
253 |
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for (step = head->read_step; step < MAX_PROFILES * ccs_total; step++) { |
254 |
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const u8 index = step / ccs_total; |
255 |
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u8 type = step % ccs_total; |
256 |
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const struct ccs_profile *ccs_profile = ccs_profile_ptr[index]; |
257 |
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head->read_step = step; |
258 |
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if (!ccs_profile) |
259 |
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continue; |
260 |
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if (!ccs_profile_entry_used[type]) |
261 |
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continue; |
262 |
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if (!type) { /* Print profile' comment tag. */ |
263 |
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bool done; |
264 |
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/***** CRITICAL SECTION START *****/ |
265 |
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spin_lock(&ccs_profile_comment_lock); |
266 |
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done = ccs_io_printf(head, "%u-COMMENT=%s\n", |
267 |
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index, ccs_profile->comment ? |
268 |
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ccs_profile->comment->name : ""); |
269 |
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spin_unlock(&ccs_profile_comment_lock); |
270 |
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/***** CRITICAL SECTION END *****/ |
271 |
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if (!done) |
272 |
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break; |
273 |
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continue; |
274 |
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} |
275 |
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type--; |
276 |
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if (type >= CCS_MAX_CONTROL_INDEX) { |
277 |
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const int i = type - CCS_MAX_CONTROL_INDEX; |
278 |
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const u8 value = ccs_profile->capability_value[i]; |
279 |
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if (!ccs_io_printf(head, |
280 |
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"%u-" KEYWORD_MAC_FOR_CAPABILITY |
281 |
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"%s=%s\n", index, |
282 |
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ccs_capability_control_keyword[i], |
283 |
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ccs_mode_4[value])) |
284 |
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break; |
285 |
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} else { |
286 |
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const unsigned int value = ccs_profile->value[type]; |
287 |
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const char **modes = NULL; |
288 |
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const char *keyword = ccs_control_array[type].keyword; |
289 |
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switch (ccs_control_array[type].max_value) { |
290 |
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case 3: |
291 |
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modes = ccs_mode_4; |
292 |
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break; |
293 |
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case 1: |
294 |
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modes = ccs_mode_2; |
295 |
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break; |
296 |
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} |
297 |
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if (modes) { |
298 |
|
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if (!ccs_io_printf(head, "%u-%s=%s\n", index, |
299 |
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keyword, modes[value])) |
300 |
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break; |
301 |
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} else { |
302 |
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if (!ccs_io_printf(head, "%u-%s=%u\n", index, |
303 |
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keyword, value)) |
304 |
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break; |
305 |
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} |
306 |
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} |
307 |
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} |
308 |
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if (step == MAX_PROFILES * ccs_total) |
309 |
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head->read_eof = true; |
310 |
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return 0; |
311 |
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} |
312 |
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|
313 |
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/* The list for "struct ccs_policy_manager_entry". */ |
314 |
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LIST_HEAD(ccs_policy_manager_list); |
315 |
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|
316 |
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/** |
317 |
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* ccs_update_manager_entry - Add a manager entry. |
318 |
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* |
319 |
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* @manager: The path to manager or the domainnamme. |
320 |
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* @is_delete: True if it is a delete request. |
321 |
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* |
322 |
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* Returns 0 on success, negative value otherwise. |
323 |
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*/ |
324 |
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static int ccs_update_manager_entry(const char *manager, const bool is_delete) |
325 |
|
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{ |
326 |
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struct ccs_policy_manager_entry *entry = NULL; |
327 |
|
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struct ccs_policy_manager_entry *ptr; |
328 |
|
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const struct ccs_path_info *saved_manager; |
329 |
|
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int error = is_delete ? -ENOENT : -ENOMEM; |
330 |
|
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bool is_domain = false; |
331 |
|
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if (ccs_is_domain_def(manager)) { |
332 |
|
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if (!ccs_is_correct_domain(manager)) |
333 |
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return -EINVAL; |
334 |
|
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is_domain = true; |
335 |
|
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} else { |
336 |
|
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if (!ccs_is_correct_path(manager, 1, -1, -1)) |
337 |
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return -EINVAL; |
338 |
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} |
339 |
|
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saved_manager = ccs_get_name(manager); |
340 |
|
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if (!saved_manager) |
341 |
|
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return -ENOMEM; |
342 |
|
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if (!is_delete) |
343 |
|
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entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
344 |
|
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mutex_lock(&ccs_policy_lock); |
345 |
|
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list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
346 |
|
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if (ptr->manager != saved_manager) |
347 |
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continue; |
348 |
|
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ptr->is_deleted = is_delete; |
349 |
|
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error = 0; |
350 |
|
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break; |
351 |
|
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} |
352 |
|
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if (!is_delete && error && ccs_memory_ok(entry, sizeof(*entry))) { |
353 |
|
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entry->manager = saved_manager; |
354 |
|
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saved_manager = NULL; |
355 |
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entry->is_domain = is_domain; |
356 |
|
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list_add_tail_rcu(&entry->list, &ccs_policy_manager_list); |
357 |
|
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entry = NULL; |
358 |
|
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error = 0; |
359 |
|
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} |
360 |
|
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mutex_unlock(&ccs_policy_lock); |
361 |
|
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ccs_put_name(saved_manager); |
362 |
|
|
kfree(entry); |
363 |
|
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return error; |
364 |
|
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} |
365 |
|
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|
366 |
|
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/** |
367 |
|
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* 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 |
|
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static int ccs_write_manager_policy(struct ccs_io_buffer *head) |
374 |
|
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{ |
375 |
|
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char *data = head->write_buf; |
376 |
|
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bool is_delete = ccs_str_starts(&data, KEYWORD_DELETE); |
377 |
|
|
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 |
|
|
/** |
553 |
|
|
* ccs_write_domain_policy - Write domain policy. |
554 |
|
|
* |
555 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
556 |
|
|
* |
557 |
|
|
* Returns 0 on success, negative value otherwise. |
558 |
|
|
*/ |
559 |
|
|
static int ccs_write_domain_policy(struct ccs_io_buffer *head) |
560 |
|
|
{ |
561 |
|
|
char *data = head->write_buf; |
562 |
|
|
struct ccs_domain_info *domain = head->write_var1; |
563 |
|
|
bool is_delete = false; |
564 |
|
|
bool is_select = false; |
565 |
|
|
unsigned int profile; |
566 |
|
|
struct ccs_condition *cond = NULL; |
567 |
|
|
char *cp; |
568 |
|
|
int error; |
569 |
|
|
if (ccs_str_starts(&data, KEYWORD_DELETE)) |
570 |
|
|
is_delete = true; |
571 |
|
|
else if (ccs_str_starts(&data, KEYWORD_SELECT)) |
572 |
|
|
is_select = true; |
573 |
|
|
if (is_select && ccs_is_select_one(head, data)) |
574 |
|
|
return 0; |
575 |
|
|
/* Don't allow updating policies by non manager programs. */ |
576 |
|
|
if (!ccs_is_policy_manager()) |
577 |
|
|
return -EPERM; |
578 |
|
|
if (ccs_is_domain_def(data)) { |
579 |
|
|
domain = NULL; |
580 |
|
|
if (is_delete) |
581 |
|
|
ccs_delete_domain(data); |
582 |
|
|
else if (is_select) |
583 |
|
|
domain = ccs_find_domain(data); |
584 |
|
|
else |
585 |
|
|
domain = ccs_find_or_assign_new_domain(data, 0); |
586 |
|
|
head->write_var1 = domain; |
587 |
|
|
return 0; |
588 |
|
|
} |
589 |
|
|
if (!domain) |
590 |
|
|
return -EINVAL; |
591 |
|
|
|
592 |
|
|
if (sscanf(data, KEYWORD_USE_PROFILE "%u", &profile) == 1 |
593 |
|
|
&& profile < MAX_PROFILES) { |
594 |
|
|
if (ccs_profile_ptr[profile] || !ccs_policy_loaded) |
595 |
|
|
domain->profile = (u8) profile; |
596 |
|
|
return 0; |
597 |
|
|
} |
598 |
|
|
if (!strcmp(data, KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { |
599 |
|
|
domain->ignore_global_allow_read = !is_delete; |
600 |
|
|
return 0; |
601 |
|
|
} |
602 |
|
|
if (!strcmp(data, KEYWORD_IGNORE_GLOBAL_ALLOW_ENV)) { |
603 |
|
|
domain->ignore_global_allow_env = !is_delete; |
604 |
|
|
return 0; |
605 |
|
|
} |
606 |
|
|
cp = ccs_find_condition_part(data); |
607 |
|
|
if (cp) { |
608 |
|
|
cond = ccs_get_condition(cp); |
609 |
|
|
if (!cond) |
610 |
|
|
return -EINVAL; |
611 |
|
|
} |
612 |
|
|
if (ccs_str_starts(&data, KEYWORD_ALLOW_CAPABILITY)) |
613 |
|
|
error = ccs_write_capability_policy(data, domain, cond, |
614 |
|
|
is_delete); |
615 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_NETWORK)) |
616 |
|
|
error = ccs_write_network_policy(data, domain, cond, is_delete); |
617 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_SIGNAL)) |
618 |
|
|
error = ccs_write_signal_policy(data, domain, cond, is_delete); |
619 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_ARGV0)) |
620 |
|
|
error = ccs_write_argv0_policy(data, domain, cond, is_delete); |
621 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_ENV)) |
622 |
|
|
error = ccs_write_env_policy(data, domain, cond, is_delete); |
623 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_MOUNT)) |
624 |
|
|
error = ccs_write_mount_policy(data, domain, cond, is_delete); |
625 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_UNMOUNT)) |
626 |
|
|
error = ccs_write_umount_policy(data, domain, cond, is_delete); |
627 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_CHROOT)) |
628 |
|
|
error = ccs_write_chroot_policy(data, domain, cond, is_delete); |
629 |
|
|
else if (ccs_str_starts(&data, KEYWORD_ALLOW_PIVOT_ROOT)) |
630 |
|
|
error = ccs_write_pivot_root_policy(data, domain, cond, |
631 |
|
|
is_delete); |
632 |
|
|
else |
633 |
|
|
error = ccs_write_file_policy(data, domain, cond, is_delete); |
634 |
|
|
if (cond) |
635 |
|
|
ccs_put_condition(cond); |
636 |
|
|
return error; |
637 |
|
|
} |
638 |
|
|
|
639 |
|
|
static bool ccs_print_name_union(struct ccs_io_buffer *head, bool is_group, |
640 |
|
|
union ccs_name_union *group) |
641 |
|
|
{ |
642 |
|
|
const int pos = head->read_avail; |
643 |
|
|
if (pos && head->read_buf[pos - 1] == ' ') |
644 |
|
|
head->read_avail--; |
645 |
|
|
if (is_group) |
646 |
kumaneko |
2870 |
return ccs_io_printf(head, " @%s", |
647 |
|
|
group->group->group_name->name); |
648 |
kumaneko |
2863 |
return ccs_io_printf(head, " %s", group->filename->name); |
649 |
|
|
} |
650 |
|
|
|
651 |
|
|
static bool ccs_print_number_union(struct ccs_io_buffer *head, bool is_group, |
652 |
|
|
union ccs_number_union *group) |
653 |
|
|
{ |
654 |
|
|
unsigned int min; |
655 |
|
|
unsigned int max; |
656 |
|
|
if (is_group) |
657 |
kumaneko |
2870 |
return ccs_io_printf(head, " @%s", |
658 |
|
|
group->group->group_name->name); |
659 |
kumaneko |
2863 |
min = group->value.min; |
660 |
|
|
max = group->value.max; |
661 |
|
|
if (min == max) |
662 |
|
|
return ccs_io_printf(head, " %u", min); |
663 |
|
|
return ccs_io_printf(head, " %u-%u", min, max); |
664 |
|
|
} |
665 |
|
|
|
666 |
|
|
/** |
667 |
|
|
* ccs_print_single_path_acl - Print a single path ACL entry. |
668 |
|
|
* |
669 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
670 |
|
|
* @ptr: Pointer to "struct ccs_single_path_acl_record". |
671 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
672 |
|
|
* |
673 |
|
|
* Returns true on success, false otherwise. |
674 |
|
|
*/ |
675 |
|
|
static bool ccs_print_single_path_acl(struct ccs_io_buffer *head, |
676 |
|
|
struct ccs_single_path_acl_record *ptr, |
677 |
|
|
const struct ccs_condition *cond) |
678 |
|
|
{ |
679 |
|
|
int pos; |
680 |
|
|
u8 bit; |
681 |
|
|
const u16 perm = ptr->perm; |
682 |
|
|
for (bit = head->read_bit; bit < MAX_SINGLE_PATH_OPERATION; bit++) { |
683 |
|
|
const char *msg; |
684 |
|
|
if (!(perm & (1 << bit))) |
685 |
|
|
continue; |
686 |
|
|
if (head->read_execute_only && bit != TYPE_EXECUTE_ACL) |
687 |
|
|
continue; |
688 |
|
|
/* Print "read/write" instead of "read" and "write". */ |
689 |
|
|
if ((bit == TYPE_READ_ACL || bit == TYPE_WRITE_ACL) |
690 |
|
|
&& (perm & (1 << TYPE_READ_WRITE_ACL))) |
691 |
|
|
continue; |
692 |
|
|
msg = ccs_sp2keyword(bit); |
693 |
|
|
pos = head->read_avail; |
694 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
695 |
|
|
!ccs_print_name_union(head, ptr->name_is_group, |
696 |
|
|
&ptr->name) || |
697 |
|
|
!ccs_print_condition(head, cond)) |
698 |
|
|
goto out; |
699 |
|
|
} |
700 |
|
|
head->read_bit = 0; |
701 |
|
|
return true; |
702 |
|
|
out: |
703 |
|
|
head->read_bit = bit; |
704 |
|
|
head->read_avail = pos; |
705 |
|
|
return false; |
706 |
|
|
} |
707 |
|
|
|
708 |
|
|
/** |
709 |
|
|
* ccs_print_mkdev_acl - Print a mkdev ACL entry. |
710 |
|
|
* |
711 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
712 |
|
|
* @ptr: Pointer to "struct ccs_mkdev_acl_record". |
713 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
714 |
|
|
* |
715 |
|
|
* Returns true on success, false otherwise. |
716 |
|
|
*/ |
717 |
|
|
static bool ccs_print_mkdev_acl(struct ccs_io_buffer *head, |
718 |
|
|
struct ccs_mkdev_acl_record *ptr, |
719 |
|
|
const struct ccs_condition *cond) |
720 |
|
|
{ |
721 |
|
|
int pos; |
722 |
|
|
u8 bit; |
723 |
|
|
const u16 perm = ptr->perm; |
724 |
|
|
for (bit = head->read_bit; bit < MAX_MKDEV_OPERATION; bit++) { |
725 |
|
|
const char *msg; |
726 |
|
|
if (!(perm & (1 << bit))) |
727 |
|
|
continue; |
728 |
|
|
msg = ccs_mkdev2keyword(bit); |
729 |
|
|
pos = head->read_avail; |
730 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
731 |
|
|
!ccs_print_name_union(head, ptr->name_is_group, |
732 |
|
|
&ptr->name) || |
733 |
|
|
!ccs_print_number_union(head, ptr->major_is_group, |
734 |
|
|
&ptr->major) || |
735 |
|
|
!ccs_print_number_union(head, ptr->minor_is_group, |
736 |
|
|
&ptr->minor) || |
737 |
|
|
!ccs_print_condition(head, cond)) |
738 |
|
|
goto out; |
739 |
|
|
} |
740 |
|
|
head->read_bit = 0; |
741 |
|
|
return true; |
742 |
|
|
out: |
743 |
|
|
head->read_bit = bit; |
744 |
|
|
head->read_avail = pos; |
745 |
|
|
return false; |
746 |
|
|
} |
747 |
|
|
|
748 |
|
|
/** |
749 |
|
|
* ccs_print_double_path_acl - Print a double path ACL entry. |
750 |
|
|
* |
751 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
752 |
|
|
* @ptr: Pointer to "struct ccs_double_path_acl_record". |
753 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
754 |
|
|
* |
755 |
|
|
* Returns true on success, false otherwise. |
756 |
|
|
*/ |
757 |
|
|
static bool ccs_print_double_path_acl(struct ccs_io_buffer *head, |
758 |
|
|
struct ccs_double_path_acl_record *ptr, |
759 |
|
|
const struct ccs_condition *cond) |
760 |
|
|
{ |
761 |
|
|
int pos; |
762 |
|
|
u8 bit; |
763 |
|
|
const u8 perm = ptr->perm; |
764 |
|
|
for (bit = head->read_bit; bit < MAX_DOUBLE_PATH_OPERATION; bit++) { |
765 |
|
|
const char *msg; |
766 |
|
|
if (!(perm & (1 << bit))) |
767 |
|
|
continue; |
768 |
|
|
msg = ccs_dp2keyword(bit); |
769 |
|
|
pos = head->read_avail; |
770 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
771 |
|
|
!ccs_print_name_union(head, ptr->name1_is_group, |
772 |
|
|
&ptr->name1) || |
773 |
|
|
!ccs_print_name_union(head, ptr->name2_is_group, |
774 |
|
|
&ptr->name2) || |
775 |
|
|
!ccs_print_condition(head, cond)) |
776 |
|
|
goto out; |
777 |
|
|
} |
778 |
|
|
head->read_bit = 0; |
779 |
|
|
return true; |
780 |
|
|
out: |
781 |
|
|
head->read_bit = bit; |
782 |
|
|
head->read_avail = pos; |
783 |
|
|
return false; |
784 |
|
|
} |
785 |
|
|
|
786 |
|
|
/** |
787 |
kumaneko |
2871 |
* ccs_print_path_number_acl - Print an ioctl/chmod/chown/chgrp ACL entry. |
788 |
kumaneko |
2863 |
* |
789 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
790 |
kumaneko |
2871 |
* @ptr: Pointer to "struct ccs_path_number_acl_record". |
791 |
kumaneko |
2863 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
792 |
|
|
* |
793 |
|
|
* Returns true on success, false otherwise. |
794 |
|
|
*/ |
795 |
kumaneko |
2871 |
static bool ccs_print_path_number_acl(struct ccs_io_buffer *head, |
796 |
|
|
struct ccs_path_number_acl_record *ptr, |
797 |
|
|
const struct ccs_condition *cond) |
798 |
kumaneko |
2863 |
{ |
799 |
kumaneko |
2871 |
int pos; |
800 |
|
|
u8 bit; |
801 |
|
|
const u8 perm = ptr->perm; |
802 |
|
|
for (bit = head->read_bit; bit < MAX_PATH_NUMBER_OPERATION; bit++) { |
803 |
|
|
const char *msg; |
804 |
|
|
if (!(perm & (1 << bit))) |
805 |
|
|
continue; |
806 |
|
|
msg = ccs_path_number2keyword(bit); |
807 |
|
|
pos = head->read_avail; |
808 |
|
|
if (!ccs_io_printf(head, "allow_%s", msg) || |
809 |
|
|
!ccs_print_name_union(head, ptr->name_is_group, |
810 |
|
|
&ptr->name) || |
811 |
|
|
!ccs_print_number_union(head, ptr->number_is_group, |
812 |
|
|
&ptr->number) || |
813 |
|
|
!ccs_print_condition(head, cond)) |
814 |
|
|
goto out; |
815 |
|
|
} |
816 |
|
|
head->read_bit = 0; |
817 |
kumaneko |
2863 |
return true; |
818 |
|
|
out: |
819 |
kumaneko |
2871 |
head->read_bit = bit; |
820 |
kumaneko |
2863 |
head->read_avail = pos; |
821 |
|
|
return false; |
822 |
|
|
} |
823 |
|
|
|
824 |
|
|
/** |
825 |
|
|
* ccs_print_argv0_acl - Print an argv[0] ACL entry. |
826 |
|
|
* |
827 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
828 |
|
|
* @ptr: Pointer to "struct ccs_argv0_acl_record". |
829 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
830 |
|
|
* |
831 |
|
|
* Returns true on success, false otherwise. |
832 |
|
|
*/ |
833 |
|
|
static bool ccs_print_argv0_acl(struct ccs_io_buffer *head, |
834 |
|
|
struct ccs_argv0_acl_record *ptr, |
835 |
|
|
const struct ccs_condition *cond) |
836 |
|
|
{ |
837 |
|
|
int pos = head->read_avail; |
838 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_ARGV0 "%s %s", |
839 |
|
|
ptr->filename->name, ptr->argv0->name)) |
840 |
|
|
goto out; |
841 |
|
|
if (!ccs_print_condition(head, cond)) |
842 |
|
|
goto out; |
843 |
|
|
return true; |
844 |
|
|
out: |
845 |
|
|
head->read_avail = pos; |
846 |
|
|
return false; |
847 |
|
|
} |
848 |
|
|
|
849 |
|
|
/** |
850 |
|
|
* ccs_print_env_acl - Print an evironment variable name's ACL entry. |
851 |
|
|
* |
852 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
853 |
|
|
* @ptr: Pointer to "struct ccs_env_acl_record". |
854 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
855 |
|
|
* |
856 |
|
|
* Returns true on success, false otherwise. |
857 |
|
|
*/ |
858 |
|
|
static bool ccs_print_env_acl(struct ccs_io_buffer *head, |
859 |
|
|
struct ccs_env_acl_record *ptr, |
860 |
|
|
const struct ccs_condition *cond) |
861 |
|
|
{ |
862 |
|
|
int pos = head->read_avail; |
863 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_ENV "%s", ptr->env->name)) |
864 |
|
|
goto out; |
865 |
|
|
if (!ccs_print_condition(head, cond)) |
866 |
|
|
goto out; |
867 |
|
|
return true; |
868 |
|
|
out: |
869 |
|
|
head->read_avail = pos; |
870 |
|
|
return false; |
871 |
|
|
} |
872 |
|
|
|
873 |
|
|
/** |
874 |
|
|
* ccs_print_capability_acl - Print a capability ACL entry. |
875 |
|
|
* |
876 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
877 |
|
|
* @ptr: Pointer to "struct ccs_capability_acl_record". |
878 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
879 |
|
|
* |
880 |
|
|
* Returns true on success, false otherwise. |
881 |
|
|
*/ |
882 |
|
|
static bool ccs_print_capability_acl(struct ccs_io_buffer *head, |
883 |
|
|
struct ccs_capability_acl_record *ptr, |
884 |
|
|
const struct ccs_condition *cond) |
885 |
|
|
{ |
886 |
|
|
int pos = head->read_avail; |
887 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_CAPABILITY "%s", |
888 |
|
|
ccs_cap2keyword(ptr->operation))) |
889 |
|
|
goto out; |
890 |
|
|
if (!ccs_print_condition(head, cond)) |
891 |
|
|
goto out; |
892 |
|
|
return true; |
893 |
|
|
out: |
894 |
|
|
head->read_avail = pos; |
895 |
|
|
return false; |
896 |
|
|
} |
897 |
|
|
|
898 |
|
|
/** |
899 |
|
|
* ccs_print_ipv4_entry - Print IPv4 address of a network ACL entry. |
900 |
|
|
* |
901 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
902 |
|
|
* @ptr: Pointer to "struct ccs_ip_network_acl_record". |
903 |
|
|
* |
904 |
|
|
* Returns true on success, false otherwise. |
905 |
|
|
*/ |
906 |
|
|
static bool ccs_print_ipv4_entry(struct ccs_io_buffer *head, |
907 |
|
|
struct ccs_ip_network_acl_record *ptr) |
908 |
|
|
{ |
909 |
|
|
const u32 min_address = ptr->address.ipv4.min; |
910 |
|
|
const u32 max_address = ptr->address.ipv4.max; |
911 |
|
|
if (!ccs_io_printf(head, "%u.%u.%u.%u", HIPQUAD(min_address))) |
912 |
|
|
return false; |
913 |
|
|
if (min_address != max_address |
914 |
|
|
&& !ccs_io_printf(head, "-%u.%u.%u.%u", HIPQUAD(max_address))) |
915 |
|
|
return false; |
916 |
|
|
return true; |
917 |
|
|
} |
918 |
|
|
|
919 |
|
|
/** |
920 |
|
|
* ccs_print_ipv6_entry - Print IPv6 address of a network ACL entry. |
921 |
|
|
* |
922 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
923 |
|
|
* @ptr: Pointer to "struct ccs_ip_network_acl_record". |
924 |
|
|
* |
925 |
|
|
* Returns true on success, false otherwise. |
926 |
|
|
*/ |
927 |
|
|
static bool ccs_print_ipv6_entry(struct ccs_io_buffer *head, |
928 |
|
|
struct ccs_ip_network_acl_record *ptr) |
929 |
|
|
{ |
930 |
|
|
char buf[64]; |
931 |
|
|
const struct in6_addr *min_address = ptr->address.ipv6.min; |
932 |
|
|
const struct in6_addr *max_address = ptr->address.ipv6.max; |
933 |
|
|
ccs_print_ipv6(buf, sizeof(buf), min_address); |
934 |
|
|
if (!ccs_io_printf(head, "%s", buf)) |
935 |
|
|
return false; |
936 |
|
|
if (min_address != max_address) { |
937 |
|
|
ccs_print_ipv6(buf, sizeof(buf), max_address); |
938 |
|
|
if (!ccs_io_printf(head, "-%s", buf)) |
939 |
|
|
return false; |
940 |
|
|
} |
941 |
|
|
return true; |
942 |
|
|
} |
943 |
|
|
|
944 |
|
|
/** |
945 |
|
|
* ccs_print_network_acl - Print a network ACL entry. |
946 |
|
|
* |
947 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
948 |
|
|
* @ptr: Pointer to "struct ccs_ip_network_acl_record". |
949 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
950 |
|
|
* |
951 |
|
|
* Returns true on success, false otherwise. |
952 |
|
|
*/ |
953 |
|
|
static bool ccs_print_network_acl(struct ccs_io_buffer *head, |
954 |
|
|
struct ccs_ip_network_acl_record *ptr, |
955 |
|
|
const struct ccs_condition *cond) |
956 |
|
|
{ |
957 |
|
|
int pos = head->read_avail; |
958 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_NETWORK "%s ", |
959 |
|
|
ccs_net2keyword(ptr->operation_type))) |
960 |
|
|
goto out; |
961 |
|
|
switch (ptr->record_type) { |
962 |
|
|
case IP_RECORD_TYPE_ADDRESS_GROUP: |
963 |
|
|
if (!ccs_io_printf(head, "@%s", |
964 |
|
|
ptr->address.group->group_name->name)) |
965 |
|
|
goto out; |
966 |
|
|
break; |
967 |
|
|
case IP_RECORD_TYPE_IPv4: |
968 |
|
|
if (!ccs_print_ipv4_entry(head, ptr)) |
969 |
|
|
goto out; |
970 |
|
|
break; |
971 |
|
|
case IP_RECORD_TYPE_IPv6: |
972 |
|
|
if (!ccs_print_ipv6_entry(head, ptr)) |
973 |
|
|
goto out; |
974 |
|
|
break; |
975 |
|
|
} |
976 |
|
|
if (!ccs_print_number_union(head, ptr->port_is_group, &ptr->port) || |
977 |
|
|
!ccs_print_condition(head, cond)) |
978 |
|
|
goto out; |
979 |
|
|
return true; |
980 |
|
|
out: |
981 |
|
|
head->read_avail = pos; |
982 |
|
|
return false; |
983 |
|
|
} |
984 |
|
|
|
985 |
|
|
/** |
986 |
|
|
* ccs_print_signal_acl - Print a signal ACL entry. |
987 |
|
|
* |
988 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
989 |
|
|
* @ptr: Pointer to "struct signale_acl_record". |
990 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
991 |
|
|
* |
992 |
|
|
* Returns true on success, false otherwise. |
993 |
|
|
*/ |
994 |
|
|
static bool ccs_print_signal_acl(struct ccs_io_buffer *head, |
995 |
|
|
struct ccs_signal_acl_record *ptr, |
996 |
|
|
const struct ccs_condition *cond) |
997 |
|
|
{ |
998 |
|
|
int pos = head->read_avail; |
999 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_SIGNAL "%u %s", |
1000 |
|
|
ptr->sig, ptr->domainname->name)) |
1001 |
|
|
goto out; |
1002 |
|
|
if (!ccs_print_condition(head, cond)) |
1003 |
|
|
goto out; |
1004 |
|
|
return true; |
1005 |
|
|
out: |
1006 |
|
|
head->read_avail = pos; |
1007 |
|
|
return false; |
1008 |
|
|
} |
1009 |
|
|
|
1010 |
|
|
/** |
1011 |
|
|
* ccs_print_execute_handler_record - Print an execute handler ACL entry. |
1012 |
|
|
* |
1013 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1014 |
|
|
* @keyword: Name of the keyword. |
1015 |
|
|
* @ptr: Pointer to "struct ccs_execute_handler_record". |
1016 |
|
|
* |
1017 |
|
|
* Returns true on success, false otherwise. |
1018 |
|
|
*/ |
1019 |
|
|
static bool ccs_print_execute_handler_record(struct ccs_io_buffer *head, |
1020 |
|
|
const char *keyword, |
1021 |
|
|
struct ccs_execute_handler_record * |
1022 |
|
|
ptr) |
1023 |
|
|
{ |
1024 |
|
|
return ccs_io_printf(head, "%s %s\n", keyword, ptr->handler->name); |
1025 |
|
|
} |
1026 |
|
|
|
1027 |
|
|
/** |
1028 |
|
|
* ccs_print_mount_acl - Print a mount ACL entry. |
1029 |
|
|
* |
1030 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1031 |
|
|
* @ptr: Pointer to "struct ccs_mount_acl_record". |
1032 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1033 |
|
|
* |
1034 |
|
|
* Returns true on success, false otherwise. |
1035 |
|
|
*/ |
1036 |
|
|
static bool ccs_print_mount_acl(struct ccs_io_buffer *head, |
1037 |
|
|
struct ccs_mount_acl_record *ptr, |
1038 |
|
|
const struct ccs_condition *cond) |
1039 |
|
|
{ |
1040 |
|
|
int pos = head->read_avail; |
1041 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_MOUNT "%s %s %s 0x%lX\n", |
1042 |
|
|
ptr->dev_name->name, ptr->dir_name->name, |
1043 |
|
|
ptr->fs_type->name, ptr->flags)) |
1044 |
|
|
goto out; |
1045 |
|
|
if (!ccs_print_condition(head, cond)) |
1046 |
|
|
goto out; |
1047 |
|
|
return true; |
1048 |
|
|
out: |
1049 |
|
|
head->read_avail = pos; |
1050 |
|
|
return false; |
1051 |
|
|
} |
1052 |
|
|
|
1053 |
|
|
/** |
1054 |
|
|
* ccs_print_umount_acl - Print a mount ACL entry. |
1055 |
|
|
* |
1056 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1057 |
|
|
* @ptr: Pointer to "struct ccs_umount_acl_record". |
1058 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1059 |
|
|
* |
1060 |
|
|
* Returns true on success, false otherwise. |
1061 |
|
|
*/ |
1062 |
|
|
static bool ccs_print_umount_acl(struct ccs_io_buffer *head, |
1063 |
|
|
struct ccs_umount_acl_record *ptr, |
1064 |
|
|
const struct ccs_condition *cond) |
1065 |
|
|
{ |
1066 |
|
|
int pos = head->read_avail; |
1067 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_UNMOUNT "%s\n", |
1068 |
|
|
ptr->dir->name)) |
1069 |
|
|
goto out; |
1070 |
|
|
if (!ccs_print_condition(head, cond)) |
1071 |
|
|
goto out; |
1072 |
|
|
return true; |
1073 |
|
|
out: |
1074 |
|
|
head->read_avail = pos; |
1075 |
|
|
return false; |
1076 |
|
|
} |
1077 |
|
|
|
1078 |
|
|
/** |
1079 |
|
|
* ccs_print_chroot_acl - Print a chroot ACL entry. |
1080 |
|
|
* |
1081 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1082 |
|
|
* @ptr: Pointer to "struct ccs_chroot_acl_record". |
1083 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1084 |
|
|
* |
1085 |
|
|
* Returns true on success, false otherwise. |
1086 |
|
|
*/ |
1087 |
|
|
static bool ccs_print_chroot_acl(struct ccs_io_buffer *head, |
1088 |
|
|
struct ccs_chroot_acl_record *ptr, |
1089 |
|
|
const struct ccs_condition *cond) |
1090 |
|
|
{ |
1091 |
|
|
int pos = head->read_avail; |
1092 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_CHROOT "%s\n", |
1093 |
|
|
ptr->dir->name)) |
1094 |
|
|
goto out; |
1095 |
|
|
if (!ccs_print_condition(head, cond)) |
1096 |
|
|
goto out; |
1097 |
|
|
return true; |
1098 |
|
|
out: |
1099 |
|
|
head->read_avail = pos; |
1100 |
|
|
return false; |
1101 |
|
|
} |
1102 |
|
|
|
1103 |
|
|
/** |
1104 |
|
|
* ccs_print_pivot_root_acl - Print a pivot_root ACL entry. |
1105 |
|
|
* |
1106 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1107 |
|
|
* @ptr: Pointer to "struct ccs_pivot_root_acl_record". |
1108 |
|
|
* @cond: Pointer to "struct ccs_condition". May be NULL. |
1109 |
|
|
* |
1110 |
|
|
* Returns true on success, false otherwise. |
1111 |
|
|
*/ |
1112 |
|
|
static bool ccs_print_pivot_root_acl(struct ccs_io_buffer *head, |
1113 |
|
|
struct ccs_pivot_root_acl_record *ptr, |
1114 |
|
|
const struct ccs_condition *cond) |
1115 |
|
|
{ |
1116 |
|
|
int pos = head->read_avail; |
1117 |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_PIVOT_ROOT "%s %s\n", |
1118 |
|
|
ptr->new_root->name, ptr->old_root->name)) |
1119 |
|
|
goto out; |
1120 |
|
|
if (!ccs_print_condition(head, cond)) |
1121 |
|
|
goto out; |
1122 |
|
|
return true; |
1123 |
|
|
out: |
1124 |
|
|
head->read_avail = pos; |
1125 |
|
|
return false; |
1126 |
|
|
} |
1127 |
|
|
|
1128 |
|
|
/** |
1129 |
|
|
* ccs_print_entry - Print an ACL entry. |
1130 |
|
|
* |
1131 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1132 |
|
|
* @ptr: Pointer to an ACL entry. |
1133 |
|
|
* |
1134 |
|
|
* Returns true on success, false otherwise. |
1135 |
|
|
*/ |
1136 |
|
|
static bool ccs_print_entry(struct ccs_io_buffer *head, |
1137 |
|
|
struct ccs_acl_info *ptr) |
1138 |
|
|
{ |
1139 |
|
|
const struct ccs_condition *cond = ptr->cond; |
1140 |
|
|
const u8 acl_type = ccs_acl_type2(ptr); |
1141 |
|
|
if (acl_type & ACL_DELETED) |
1142 |
|
|
return true; |
1143 |
|
|
if (acl_type == TYPE_SINGLE_PATH_ACL) { |
1144 |
|
|
struct ccs_single_path_acl_record *acl |
1145 |
|
|
= container_of(ptr, struct ccs_single_path_acl_record, |
1146 |
|
|
head); |
1147 |
|
|
return ccs_print_single_path_acl(head, acl, cond); |
1148 |
|
|
} |
1149 |
|
|
if (acl_type == TYPE_EXECUTE_HANDLER) { |
1150 |
|
|
struct ccs_execute_handler_record *acl |
1151 |
|
|
= container_of(ptr, struct ccs_execute_handler_record, |
1152 |
|
|
head); |
1153 |
|
|
const char *keyword = KEYWORD_EXECUTE_HANDLER; |
1154 |
|
|
return ccs_print_execute_handler_record(head, keyword, acl); |
1155 |
|
|
} |
1156 |
|
|
if (acl_type == TYPE_DENIED_EXECUTE_HANDLER) { |
1157 |
|
|
struct ccs_execute_handler_record *acl |
1158 |
|
|
= container_of(ptr, struct ccs_execute_handler_record, |
1159 |
|
|
head); |
1160 |
|
|
const char *keyword = KEYWORD_DENIED_EXECUTE_HANDLER; |
1161 |
|
|
return ccs_print_execute_handler_record(head, keyword, acl); |
1162 |
|
|
} |
1163 |
|
|
if (head->read_execute_only) |
1164 |
|
|
return true; |
1165 |
|
|
if (acl_type == TYPE_MKDEV_ACL) { |
1166 |
|
|
struct ccs_mkdev_acl_record *acl |
1167 |
|
|
= container_of(ptr, struct ccs_mkdev_acl_record, head); |
1168 |
|
|
return ccs_print_mkdev_acl(head, acl, cond); |
1169 |
|
|
} |
1170 |
|
|
if (acl_type == TYPE_DOUBLE_PATH_ACL) { |
1171 |
|
|
struct ccs_double_path_acl_record *acl |
1172 |
|
|
= container_of(ptr, struct ccs_double_path_acl_record, |
1173 |
|
|
head); |
1174 |
|
|
return ccs_print_double_path_acl(head, acl, cond); |
1175 |
|
|
} |
1176 |
kumaneko |
2871 |
if (acl_type == TYPE_PATH_NUMBER_ACL) { |
1177 |
|
|
struct ccs_path_number_acl_record *acl |
1178 |
|
|
= container_of(ptr, struct ccs_path_number_acl_record, |
1179 |
|
|
head); |
1180 |
|
|
return ccs_print_path_number_acl(head, acl, cond); |
1181 |
kumaneko |
2863 |
} |
1182 |
|
|
if (acl_type == TYPE_ARGV0_ACL) { |
1183 |
|
|
struct ccs_argv0_acl_record *acl |
1184 |
|
|
= container_of(ptr, struct ccs_argv0_acl_record, head); |
1185 |
|
|
return ccs_print_argv0_acl(head, acl, cond); |
1186 |
|
|
} |
1187 |
|
|
if (acl_type == TYPE_ENV_ACL) { |
1188 |
|
|
struct ccs_env_acl_record *acl |
1189 |
|
|
= container_of(ptr, struct ccs_env_acl_record, head); |
1190 |
|
|
return ccs_print_env_acl(head, acl, cond); |
1191 |
|
|
} |
1192 |
|
|
if (acl_type == TYPE_CAPABILITY_ACL) { |
1193 |
|
|
struct ccs_capability_acl_record *acl |
1194 |
|
|
= container_of(ptr, struct ccs_capability_acl_record, |
1195 |
|
|
head); |
1196 |
|
|
return ccs_print_capability_acl(head, acl, cond); |
1197 |
|
|
} |
1198 |
|
|
if (acl_type == TYPE_IP_NETWORK_ACL) { |
1199 |
|
|
struct ccs_ip_network_acl_record *acl |
1200 |
|
|
= container_of(ptr, struct ccs_ip_network_acl_record, |
1201 |
|
|
head); |
1202 |
|
|
return ccs_print_network_acl(head, acl, cond); |
1203 |
|
|
} |
1204 |
|
|
if (acl_type == TYPE_SIGNAL_ACL) { |
1205 |
|
|
struct ccs_signal_acl_record *acl |
1206 |
|
|
= container_of(ptr, struct ccs_signal_acl_record, head); |
1207 |
|
|
return ccs_print_signal_acl(head, acl, cond); |
1208 |
|
|
} |
1209 |
|
|
if (acl_type == TYPE_MOUNT_ACL) { |
1210 |
|
|
struct ccs_mount_acl_record *acl |
1211 |
|
|
= container_of(ptr, struct ccs_mount_acl_record, head); |
1212 |
|
|
return ccs_print_mount_acl(head, acl, cond); |
1213 |
|
|
} |
1214 |
|
|
if (acl_type == TYPE_UMOUNT_ACL) { |
1215 |
|
|
struct ccs_umount_acl_record *acl |
1216 |
|
|
= container_of(ptr, struct ccs_umount_acl_record, head); |
1217 |
|
|
return ccs_print_umount_acl(head, acl, cond); |
1218 |
|
|
} |
1219 |
|
|
if (acl_type == TYPE_CHROOT_ACL) { |
1220 |
|
|
struct ccs_chroot_acl_record *acl |
1221 |
|
|
= container_of(ptr, struct ccs_chroot_acl_record, head); |
1222 |
|
|
return ccs_print_chroot_acl(head, acl, cond); |
1223 |
|
|
} |
1224 |
|
|
if (acl_type == TYPE_PIVOT_ROOT_ACL) { |
1225 |
|
|
struct ccs_pivot_root_acl_record *acl |
1226 |
|
|
= container_of(ptr, struct ccs_pivot_root_acl_record, |
1227 |
|
|
head); |
1228 |
|
|
return ccs_print_pivot_root_acl(head, acl, cond); |
1229 |
|
|
} |
1230 |
|
|
/* Workaround for gcc 3.2.2's inline bug. */ |
1231 |
|
|
if (acl_type & ACL_DELETED) |
1232 |
|
|
return true; |
1233 |
|
|
BUG(); /* This must not happen. */ |
1234 |
|
|
return false; |
1235 |
|
|
} |
1236 |
|
|
|
1237 |
|
|
/** |
1238 |
|
|
* ccs_read_domain_policy - Read domain policy. |
1239 |
|
|
* |
1240 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1241 |
|
|
* |
1242 |
|
|
* Returns 0. |
1243 |
|
|
* |
1244 |
|
|
* Caller holds ccs_read_lock(). |
1245 |
|
|
*/ |
1246 |
|
|
static int ccs_read_domain_policy(struct ccs_io_buffer *head) |
1247 |
|
|
{ |
1248 |
|
|
struct list_head *dpos; |
1249 |
|
|
struct list_head *apos; |
1250 |
|
|
ccs_check_read_lock(); |
1251 |
|
|
if (head->read_eof) |
1252 |
|
|
return 0; |
1253 |
|
|
if (head->read_step == 0) |
1254 |
|
|
head->read_step = 1; |
1255 |
|
|
list_for_each_cookie(dpos, head->read_var1, &ccs_domain_list) { |
1256 |
|
|
struct ccs_domain_info *domain; |
1257 |
|
|
const char *quota_exceeded = ""; |
1258 |
|
|
const char *transition_failed = ""; |
1259 |
|
|
const char *ignore_global_allow_read = ""; |
1260 |
|
|
const char *ignore_global_allow_env = ""; |
1261 |
|
|
domain = list_entry(dpos, struct ccs_domain_info, list); |
1262 |
|
|
if (head->read_step != 1) |
1263 |
|
|
goto acl_loop; |
1264 |
|
|
if (domain->is_deleted && !head->read_single_domain) |
1265 |
|
|
continue; |
1266 |
|
|
/* Print domainname and flags. */ |
1267 |
|
|
if (domain->quota_warned) |
1268 |
|
|
quota_exceeded = "quota_exceeded\n"; |
1269 |
|
|
if (domain->domain_transition_failed) |
1270 |
|
|
transition_failed = "transition_failed\n"; |
1271 |
|
|
if (domain->ignore_global_allow_read) |
1272 |
|
|
ignore_global_allow_read |
1273 |
|
|
= KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; |
1274 |
|
|
if (domain->ignore_global_allow_env) |
1275 |
|
|
ignore_global_allow_env |
1276 |
|
|
= KEYWORD_IGNORE_GLOBAL_ALLOW_ENV "\n"; |
1277 |
|
|
if (!ccs_io_printf(head, "%s\n" KEYWORD_USE_PROFILE "%u\n" |
1278 |
|
|
"%s%s%s%s\n", domain->domainname->name, |
1279 |
|
|
domain->profile, quota_exceeded, |
1280 |
|
|
transition_failed, |
1281 |
|
|
ignore_global_allow_read, |
1282 |
|
|
ignore_global_allow_env)) |
1283 |
|
|
return 0; |
1284 |
|
|
head->read_step = 2; |
1285 |
|
|
acl_loop: |
1286 |
|
|
if (head->read_step == 3) |
1287 |
|
|
goto tail_mark; |
1288 |
|
|
/* Print ACL entries in the domain. */ |
1289 |
|
|
list_for_each_cookie(apos, head->read_var2, |
1290 |
|
|
&domain->acl_info_list) { |
1291 |
|
|
struct ccs_acl_info *ptr |
1292 |
|
|
= list_entry(apos, struct ccs_acl_info, list); |
1293 |
|
|
if (!ccs_print_entry(head, ptr)) |
1294 |
|
|
return 0; |
1295 |
|
|
} |
1296 |
|
|
head->read_step = 3; |
1297 |
|
|
tail_mark: |
1298 |
|
|
if (!ccs_io_printf(head, "\n")) |
1299 |
|
|
return 0; |
1300 |
|
|
head->read_step = 1; |
1301 |
|
|
if (head->read_single_domain) |
1302 |
|
|
break; |
1303 |
|
|
} |
1304 |
|
|
head->read_eof = true; |
1305 |
|
|
return 0; |
1306 |
|
|
} |
1307 |
|
|
|
1308 |
|
|
/** |
1309 |
|
|
* ccs_write_domain_profile - Assign profile for specified domain. |
1310 |
|
|
* |
1311 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1312 |
|
|
* |
1313 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1314 |
|
|
* |
1315 |
|
|
* This is equivalent to doing |
1316 |
|
|
* |
1317 |
|
|
* ( echo "select " $domainname; echo "use_profile " $profile ) | |
1318 |
|
|
* /usr/lib/ccs/loadpolicy -d |
1319 |
|
|
* |
1320 |
|
|
* Caller holds ccs_read_lock(). |
1321 |
|
|
*/ |
1322 |
|
|
static int ccs_write_domain_profile(struct ccs_io_buffer *head) |
1323 |
|
|
{ |
1324 |
|
|
char *data = head->write_buf; |
1325 |
|
|
char *cp = strchr(data, ' '); |
1326 |
|
|
struct ccs_domain_info *domain; |
1327 |
|
|
unsigned int profile; |
1328 |
|
|
ccs_check_read_lock(); |
1329 |
|
|
if (!cp) |
1330 |
|
|
return -EINVAL; |
1331 |
|
|
*cp = '\0'; |
1332 |
|
|
profile = simple_strtoul(data, NULL, 10); |
1333 |
|
|
if (profile >= MAX_PROFILES) |
1334 |
|
|
return -EINVAL; |
1335 |
|
|
domain = ccs_find_domain(cp + 1); |
1336 |
|
|
if (domain && (ccs_profile_ptr[profile] || !ccs_policy_loaded)) |
1337 |
|
|
domain->profile = (u8) profile; |
1338 |
|
|
return 0; |
1339 |
|
|
} |
1340 |
|
|
|
1341 |
|
|
/** |
1342 |
|
|
* ccs_read_domain_profile - Read only domainname and profile. |
1343 |
|
|
* |
1344 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1345 |
|
|
* |
1346 |
|
|
* Returns list of profile number and domainname pairs. |
1347 |
|
|
* |
1348 |
|
|
* This is equivalent to doing |
1349 |
|
|
* |
1350 |
|
|
* grep -A 1 '^<kernel>' /proc/ccs/domain_policy | |
1351 |
|
|
* awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) |
1352 |
|
|
* domainname = $0; } else if ( $1 == "use_profile" ) { |
1353 |
|
|
* print $2 " " domainname; domainname = ""; } } ; ' |
1354 |
|
|
* |
1355 |
|
|
* Caller holds ccs_read_lock(). |
1356 |
|
|
*/ |
1357 |
|
|
static int ccs_read_domain_profile(struct ccs_io_buffer *head) |
1358 |
|
|
{ |
1359 |
|
|
struct list_head *pos; |
1360 |
|
|
ccs_check_read_lock(); |
1361 |
|
|
if (head->read_eof) |
1362 |
|
|
return 0; |
1363 |
|
|
list_for_each_cookie(pos, head->read_var1, &ccs_domain_list) { |
1364 |
|
|
struct ccs_domain_info *domain; |
1365 |
|
|
domain = list_entry(pos, struct ccs_domain_info, list); |
1366 |
|
|
if (domain->is_deleted) |
1367 |
|
|
continue; |
1368 |
|
|
if (!ccs_io_printf(head, "%u %s\n", domain->profile, |
1369 |
|
|
domain->domainname->name)) |
1370 |
|
|
return 0; |
1371 |
|
|
} |
1372 |
|
|
head->read_eof = true; |
1373 |
|
|
return 0; |
1374 |
|
|
} |
1375 |
|
|
|
1376 |
|
|
/** |
1377 |
|
|
* ccs_write_pid: Specify PID to obtain domainname. |
1378 |
|
|
* |
1379 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1380 |
|
|
* |
1381 |
|
|
* Returns 0. |
1382 |
|
|
*/ |
1383 |
|
|
static int ccs_write_pid(struct ccs_io_buffer *head) |
1384 |
|
|
{ |
1385 |
|
|
head->read_eof = false; |
1386 |
|
|
return 0; |
1387 |
|
|
} |
1388 |
|
|
|
1389 |
|
|
/** |
1390 |
|
|
* ccs_read_pid - Read information of a process. |
1391 |
|
|
* |
1392 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1393 |
|
|
* |
1394 |
|
|
* Returns the domainname which the specified PID is in or |
1395 |
|
|
* process information of the specified PID on success, |
1396 |
|
|
* empty string otherwise. |
1397 |
|
|
* |
1398 |
|
|
* Caller holds ccs_read_lock(). |
1399 |
|
|
*/ |
1400 |
|
|
static int ccs_read_pid(struct ccs_io_buffer *head) |
1401 |
|
|
{ |
1402 |
|
|
char *buf = head->write_buf; |
1403 |
|
|
bool task_info = false; |
1404 |
|
|
unsigned int pid; |
1405 |
|
|
struct task_struct *p; |
1406 |
|
|
struct ccs_domain_info *domain = NULL; |
1407 |
|
|
u32 ccs_flags = 0; |
1408 |
|
|
ccs_check_read_lock(); |
1409 |
|
|
/* Accessing write_buf is safe because head->io_sem is held. */ |
1410 |
|
|
if (!buf) |
1411 |
|
|
goto done; /* Do nothing if open(O_RDONLY). */ |
1412 |
|
|
if (head->read_avail || head->read_eof) |
1413 |
|
|
goto done; |
1414 |
|
|
head->read_eof = true; |
1415 |
|
|
if (ccs_str_starts(&buf, "info ")) |
1416 |
|
|
task_info = true; |
1417 |
|
|
pid = (unsigned int) simple_strtoul(buf, NULL, 10); |
1418 |
|
|
/***** CRITICAL SECTION START *****/ |
1419 |
|
|
read_lock(&tasklist_lock); |
1420 |
|
|
p = find_task_by_pid(pid); |
1421 |
|
|
if (p) { |
1422 |
|
|
domain = ccs_task_domain(p); |
1423 |
|
|
ccs_flags = p->ccs_flags; |
1424 |
|
|
} |
1425 |
|
|
read_unlock(&tasklist_lock); |
1426 |
|
|
/***** CRITICAL SECTION END *****/ |
1427 |
|
|
if (!domain) |
1428 |
|
|
goto done; |
1429 |
|
|
if (!task_info) |
1430 |
|
|
ccs_io_printf(head, "%u %u %s", pid, domain->profile, |
1431 |
|
|
domain->domainname->name); |
1432 |
|
|
else |
1433 |
|
|
ccs_io_printf(head, "%u manager=%s execute_handler=%s " |
1434 |
|
|
"state[0]=%u state[1]=%u state[2]=%u", pid, |
1435 |
|
|
ccs_flags & CCS_TASK_IS_POLICY_MANAGER ? |
1436 |
|
|
"yes" : "no", |
1437 |
|
|
ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER ? |
1438 |
|
|
"yes" : "no", |
1439 |
|
|
(u8) (ccs_flags >> 24), |
1440 |
|
|
(u8) (ccs_flags >> 16), |
1441 |
|
|
(u8) (ccs_flags >> 8)); |
1442 |
|
|
done: |
1443 |
|
|
return 0; |
1444 |
|
|
} |
1445 |
|
|
|
1446 |
|
|
/** |
1447 |
|
|
* ccs_write_exception_policy - Write exception policy. |
1448 |
|
|
* |
1449 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1450 |
|
|
* |
1451 |
|
|
* Returns 0 on success, negative value otherwise. |
1452 |
|
|
*/ |
1453 |
|
|
static int ccs_write_exception_policy(struct ccs_io_buffer *head) |
1454 |
|
|
{ |
1455 |
|
|
char *data = head->write_buf; |
1456 |
|
|
bool is_delete = ccs_str_starts(&data, KEYWORD_DELETE); |
1457 |
|
|
if (ccs_str_starts(&data, KEYWORD_KEEP_DOMAIN)) |
1458 |
|
|
return ccs_write_domain_keeper_policy(data, false, is_delete); |
1459 |
|
|
if (ccs_str_starts(&data, KEYWORD_NO_KEEP_DOMAIN)) |
1460 |
|
|
return ccs_write_domain_keeper_policy(data, true, is_delete); |
1461 |
|
|
if (ccs_str_starts(&data, KEYWORD_INITIALIZE_DOMAIN)) |
1462 |
|
|
return ccs_write_domain_initializer_policy(data, false, |
1463 |
|
|
is_delete); |
1464 |
|
|
if (ccs_str_starts(&data, KEYWORD_NO_INITIALIZE_DOMAIN)) |
1465 |
|
|
return ccs_write_domain_initializer_policy(data, true, |
1466 |
|
|
is_delete); |
1467 |
|
|
if (ccs_str_starts(&data, KEYWORD_AGGREGATOR)) |
1468 |
|
|
return ccs_write_aggregator_policy(data, is_delete); |
1469 |
|
|
if (ccs_str_starts(&data, KEYWORD_ALLOW_READ)) |
1470 |
|
|
return ccs_write_globally_readable_policy(data, is_delete); |
1471 |
|
|
if (ccs_str_starts(&data, KEYWORD_ALLOW_ENV)) |
1472 |
|
|
return ccs_write_globally_usable_env_policy(data, is_delete); |
1473 |
|
|
if (ccs_str_starts(&data, KEYWORD_FILE_PATTERN)) |
1474 |
|
|
return ccs_write_pattern_policy(data, is_delete); |
1475 |
|
|
if (ccs_str_starts(&data, KEYWORD_PATH_GROUP)) |
1476 |
|
|
return ccs_write_path_group_policy(data, is_delete); |
1477 |
|
|
if (ccs_str_starts(&data, KEYWORD_NUMBER_GROUP)) |
1478 |
|
|
return ccs_write_number_group_policy(data, is_delete); |
1479 |
|
|
if (ccs_str_starts(&data, KEYWORD_DENY_REWRITE)) |
1480 |
|
|
return ccs_write_no_rewrite_policy(data, is_delete); |
1481 |
|
|
if (ccs_str_starts(&data, KEYWORD_ADDRESS_GROUP)) |
1482 |
|
|
return ccs_write_address_group_policy(data, is_delete); |
1483 |
|
|
if (ccs_str_starts(&data, KEYWORD_DENY_AUTOBIND)) |
1484 |
|
|
return ccs_write_reserved_port_policy(data, is_delete); |
1485 |
|
|
return -EINVAL; |
1486 |
|
|
} |
1487 |
|
|
|
1488 |
|
|
/** |
1489 |
|
|
* ccs_read_exception_policy - Read exception policy. |
1490 |
|
|
* |
1491 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1492 |
|
|
* |
1493 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1494 |
|
|
* |
1495 |
|
|
* Caller holds ccs_read_lock(). |
1496 |
|
|
*/ |
1497 |
|
|
static int ccs_read_exception_policy(struct ccs_io_buffer *head) |
1498 |
|
|
{ |
1499 |
|
|
ccs_check_read_lock(); |
1500 |
|
|
if (!head->read_eof) { |
1501 |
|
|
switch (head->read_step) { |
1502 |
|
|
case 0: |
1503 |
|
|
head->read_var2 = NULL; |
1504 |
|
|
head->read_step = 1; |
1505 |
|
|
case 1: |
1506 |
|
|
if (!ccs_read_domain_keeper_policy(head)) |
1507 |
|
|
break; |
1508 |
|
|
head->read_var2 = NULL; |
1509 |
|
|
head->read_step = 2; |
1510 |
|
|
case 2: |
1511 |
|
|
if (!ccs_read_globally_readable_policy(head)) |
1512 |
|
|
break; |
1513 |
|
|
head->read_var2 = NULL; |
1514 |
|
|
head->read_step = 3; |
1515 |
|
|
case 3: |
1516 |
|
|
if (!ccs_read_globally_usable_env_policy(head)) |
1517 |
|
|
break; |
1518 |
|
|
head->read_var2 = NULL; |
1519 |
|
|
head->read_step = 4; |
1520 |
|
|
case 4: |
1521 |
|
|
if (!ccs_read_domain_initializer_policy(head)) |
1522 |
|
|
break; |
1523 |
|
|
head->read_var2 = NULL; |
1524 |
|
|
head->read_step = 6; |
1525 |
|
|
case 6: |
1526 |
|
|
if (!ccs_read_aggregator_policy(head)) |
1527 |
|
|
break; |
1528 |
|
|
head->read_var2 = NULL; |
1529 |
|
|
head->read_step = 7; |
1530 |
|
|
case 7: |
1531 |
|
|
if (!ccs_read_file_pattern(head)) |
1532 |
|
|
break; |
1533 |
|
|
head->read_var2 = NULL; |
1534 |
|
|
head->read_step = 8; |
1535 |
|
|
case 8: |
1536 |
|
|
if (!ccs_read_no_rewrite_policy(head)) |
1537 |
|
|
break; |
1538 |
|
|
head->read_var2 = NULL; |
1539 |
|
|
head->read_step = 9; |
1540 |
|
|
case 9: |
1541 |
|
|
if (!ccs_read_path_group_policy(head)) |
1542 |
|
|
break; |
1543 |
|
|
head->read_var1 = NULL; |
1544 |
|
|
head->read_var2 = NULL; |
1545 |
|
|
head->read_step = 10; |
1546 |
|
|
case 10: |
1547 |
|
|
if (!ccs_read_number_group_policy(head)) |
1548 |
|
|
break; |
1549 |
|
|
head->read_var1 = NULL; |
1550 |
|
|
head->read_var2 = NULL; |
1551 |
|
|
head->read_step = 11; |
1552 |
|
|
case 11: |
1553 |
|
|
if (!ccs_read_address_group_policy(head)) |
1554 |
|
|
break; |
1555 |
|
|
head->read_var2 = NULL; |
1556 |
|
|
head->read_step = 12; |
1557 |
|
|
case 12: |
1558 |
|
|
if (!ccs_read_reserved_port_policy(head)) |
1559 |
|
|
break; |
1560 |
|
|
head->read_eof = true; |
1561 |
|
|
break; |
1562 |
|
|
default: |
1563 |
|
|
return -EINVAL; |
1564 |
|
|
} |
1565 |
|
|
} |
1566 |
|
|
return 0; |
1567 |
|
|
} |
1568 |
|
|
|
1569 |
|
|
/* Wait queue for ccs_query_list. */ |
1570 |
|
|
static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait); |
1571 |
|
|
|
1572 |
|
|
/* Lock for manipulating ccs_query_list. */ |
1573 |
|
|
static DEFINE_SPINLOCK(ccs_query_list_lock); |
1574 |
|
|
|
1575 |
|
|
/* Structure for query. */ |
1576 |
|
|
struct ccs_query_entry { |
1577 |
|
|
struct list_head list; |
1578 |
|
|
char *query; |
1579 |
|
|
int query_len; |
1580 |
|
|
unsigned int serial; |
1581 |
|
|
int timer; |
1582 |
|
|
int answer; |
1583 |
|
|
}; |
1584 |
|
|
|
1585 |
|
|
/* The list for "struct ccs_query_entry". */ |
1586 |
|
|
static LIST_HEAD(ccs_query_list); |
1587 |
|
|
|
1588 |
|
|
/* Number of "struct file" referring /proc/ccs/query interface. */ |
1589 |
|
|
static atomic_t ccs_query_observers = ATOMIC_INIT(0); |
1590 |
|
|
|
1591 |
|
|
/** |
1592 |
|
|
* ccs_check_supervisor - Ask for the supervisor's decision. |
1593 |
|
|
* |
1594 |
|
|
* @r: Pointer to "struct ccs_request_info". |
1595 |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
1596 |
|
|
* |
1597 |
|
|
* Returns 0 if the supervisor decided to permit the access request which |
1598 |
|
|
* violated the policy in enforcing mode, 1 if the supervisor decided to |
1599 |
|
|
* retry the access request which violated the policy in enforcing mode, |
1600 |
|
|
* -EPERM otherwise. |
1601 |
|
|
*/ |
1602 |
|
|
int ccs_check_supervisor(struct ccs_request_info *r, const char *fmt, ...) |
1603 |
|
|
{ |
1604 |
|
|
va_list args; |
1605 |
|
|
int error = -EPERM; |
1606 |
|
|
int pos; |
1607 |
|
|
int len; |
1608 |
|
|
static unsigned int ccs_serial; |
1609 |
|
|
struct ccs_query_entry *ccs_query_entry = NULL; |
1610 |
|
|
bool quota_exceeded = false; |
1611 |
|
|
char *header; |
1612 |
|
|
if (!r->domain) |
1613 |
|
|
r->domain = ccs_current_domain(); |
1614 |
|
|
if (!atomic_read(&ccs_query_observers)) { |
1615 |
|
|
int i; |
1616 |
|
|
if (current->ccs_flags & CCS_DONT_SLEEP_ON_ENFORCE_ERROR) |
1617 |
|
|
return -EPERM; |
1618 |
|
|
for (i = 0; i < ccs_check_flags(r->domain, CCS_SLEEP_PERIOD); |
1619 |
|
|
i++) { |
1620 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
1621 |
|
|
schedule_timeout(HZ / 10); |
1622 |
|
|
} |
1623 |
|
|
return -EPERM; |
1624 |
|
|
} |
1625 |
|
|
va_start(args, fmt); |
1626 |
|
|
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; |
1627 |
|
|
va_end(args); |
1628 |
|
|
header = ccs_init_audit_log(&len, r); |
1629 |
|
|
if (!header) |
1630 |
|
|
goto out; |
1631 |
|
|
ccs_query_entry = kzalloc(sizeof(*ccs_query_entry), GFP_KERNEL); |
1632 |
|
|
if (!ccs_query_entry) |
1633 |
|
|
goto out; |
1634 |
|
|
ccs_query_entry->query = kzalloc(len, GFP_KERNEL); |
1635 |
|
|
if (!ccs_query_entry->query) |
1636 |
|
|
goto out; |
1637 |
|
|
INIT_LIST_HEAD(&ccs_query_entry->list); |
1638 |
|
|
/***** CRITICAL SECTION START *****/ |
1639 |
|
|
spin_lock(&ccs_query_list_lock); |
1640 |
|
|
if (ccs_quota_for_query && ccs_query_memory_size + len + |
1641 |
|
|
sizeof(*ccs_query_entry) >= ccs_quota_for_query) { |
1642 |
|
|
quota_exceeded = true; |
1643 |
|
|
} else { |
1644 |
|
|
ccs_query_memory_size += len + sizeof(*ccs_query_entry); |
1645 |
|
|
ccs_query_entry->serial = ccs_serial++; |
1646 |
|
|
} |
1647 |
|
|
spin_unlock(&ccs_query_list_lock); |
1648 |
|
|
/***** CRITICAL SECTION END *****/ |
1649 |
|
|
if (quota_exceeded) |
1650 |
|
|
goto out; |
1651 |
|
|
pos = snprintf(ccs_query_entry->query, len - 1, "Q%u-%hu\n%s", |
1652 |
|
|
ccs_query_entry->serial, r->retry, header); |
1653 |
|
|
kfree(header); |
1654 |
|
|
header = NULL; |
1655 |
|
|
va_start(args, fmt); |
1656 |
|
|
vsnprintf(ccs_query_entry->query + pos, len - 1 - pos, fmt, args); |
1657 |
|
|
ccs_query_entry->query_len = strlen(ccs_query_entry->query) + 1; |
1658 |
|
|
va_end(args); |
1659 |
|
|
/***** CRITICAL SECTION START *****/ |
1660 |
|
|
spin_lock(&ccs_query_list_lock); |
1661 |
|
|
list_add_tail(&ccs_query_entry->list, &ccs_query_list); |
1662 |
|
|
spin_unlock(&ccs_query_list_lock); |
1663 |
|
|
/***** CRITICAL SECTION END *****/ |
1664 |
|
|
/* Give 10 seconds for supervisor's opinion. */ |
1665 |
|
|
for (ccs_query_entry->timer = 0; |
1666 |
|
|
atomic_read(&ccs_query_observers) && ccs_query_entry->timer < 100; |
1667 |
|
|
ccs_query_entry->timer++) { |
1668 |
|
|
wake_up(&ccs_query_wait); |
1669 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
1670 |
|
|
schedule_timeout(HZ / 10); |
1671 |
|
|
if (ccs_query_entry->answer) |
1672 |
|
|
break; |
1673 |
|
|
} |
1674 |
|
|
/***** CRITICAL SECTION START *****/ |
1675 |
|
|
spin_lock(&ccs_query_list_lock); |
1676 |
|
|
list_del(&ccs_query_entry->list); |
1677 |
|
|
ccs_query_memory_size -= len + sizeof(*ccs_query_entry); |
1678 |
|
|
spin_unlock(&ccs_query_list_lock); |
1679 |
|
|
/***** CRITICAL SECTION END *****/ |
1680 |
|
|
switch (ccs_query_entry->answer) { |
1681 |
|
|
case 3: /* Asked to retry by administrator. */ |
1682 |
|
|
error = 1; |
1683 |
|
|
r->retry++; |
1684 |
|
|
break; |
1685 |
|
|
case 1: |
1686 |
|
|
/* Granted by administrator. */ |
1687 |
|
|
error = 0; |
1688 |
|
|
break; |
1689 |
|
|
case 0: |
1690 |
|
|
/* Timed out. */ |
1691 |
|
|
break; |
1692 |
|
|
default: |
1693 |
|
|
/* Rejected by administrator. */ |
1694 |
|
|
break; |
1695 |
|
|
} |
1696 |
|
|
out: |
1697 |
|
|
if (ccs_query_entry) |
1698 |
|
|
kfree(ccs_query_entry->query); |
1699 |
|
|
kfree(ccs_query_entry); |
1700 |
|
|
kfree(header); |
1701 |
|
|
return error; |
1702 |
|
|
} |
1703 |
|
|
|
1704 |
|
|
/** |
1705 |
|
|
* ccs_poll_query - poll() for /proc/ccs/query. |
1706 |
|
|
* |
1707 |
|
|
* @file: Pointer to "struct file". |
1708 |
|
|
* @wait: Pointer to "poll_table". |
1709 |
|
|
* |
1710 |
|
|
* Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
1711 |
|
|
* |
1712 |
|
|
* Waits for access requests which violated policy in enforcing mode. |
1713 |
|
|
*/ |
1714 |
|
|
static int ccs_poll_query(struct file *file, poll_table *wait) |
1715 |
|
|
{ |
1716 |
|
|
struct list_head *tmp; |
1717 |
|
|
bool found = false; |
1718 |
|
|
u8 i; |
1719 |
|
|
for (i = 0; i < 2; i++) { |
1720 |
|
|
/***** CRITICAL SECTION START *****/ |
1721 |
|
|
spin_lock(&ccs_query_list_lock); |
1722 |
|
|
list_for_each(tmp, &ccs_query_list) { |
1723 |
|
|
struct ccs_query_entry *ptr |
1724 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
1725 |
|
|
if (ptr->answer) |
1726 |
|
|
continue; |
1727 |
|
|
found = true; |
1728 |
|
|
break; |
1729 |
|
|
} |
1730 |
|
|
spin_unlock(&ccs_query_list_lock); |
1731 |
|
|
/***** CRITICAL SECTION END *****/ |
1732 |
|
|
if (found) |
1733 |
|
|
return POLLIN | POLLRDNORM; |
1734 |
|
|
if (i) |
1735 |
|
|
break; |
1736 |
|
|
poll_wait(file, &ccs_query_wait, wait); |
1737 |
|
|
} |
1738 |
|
|
return 0; |
1739 |
|
|
} |
1740 |
|
|
|
1741 |
|
|
/** |
1742 |
|
|
* ccs_read_query - Read access requests which violated policy in enforcing mode. |
1743 |
|
|
* |
1744 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1745 |
|
|
* |
1746 |
|
|
* Returns 0. |
1747 |
|
|
*/ |
1748 |
|
|
static int ccs_read_query(struct ccs_io_buffer *head) |
1749 |
|
|
{ |
1750 |
|
|
struct list_head *tmp; |
1751 |
|
|
int pos = 0; |
1752 |
|
|
int len = 0; |
1753 |
|
|
char *buf; |
1754 |
|
|
if (head->read_avail) |
1755 |
|
|
return 0; |
1756 |
|
|
if (head->read_buf) { |
1757 |
|
|
kfree(head->read_buf); |
1758 |
|
|
head->read_buf = NULL; |
1759 |
|
|
head->readbuf_size = 0; |
1760 |
|
|
} |
1761 |
|
|
/***** CRITICAL SECTION START *****/ |
1762 |
|
|
spin_lock(&ccs_query_list_lock); |
1763 |
|
|
list_for_each(tmp, &ccs_query_list) { |
1764 |
|
|
struct ccs_query_entry *ptr |
1765 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
1766 |
|
|
if (ptr->answer) |
1767 |
|
|
continue; |
1768 |
|
|
if (pos++ != head->read_step) |
1769 |
|
|
continue; |
1770 |
|
|
len = ptr->query_len; |
1771 |
|
|
break; |
1772 |
|
|
} |
1773 |
|
|
spin_unlock(&ccs_query_list_lock); |
1774 |
|
|
/***** CRITICAL SECTION END *****/ |
1775 |
|
|
if (!len) { |
1776 |
|
|
head->read_step = 0; |
1777 |
|
|
return 0; |
1778 |
|
|
} |
1779 |
|
|
buf = kzalloc(len, GFP_KERNEL); |
1780 |
|
|
if (!buf) |
1781 |
|
|
return 0; |
1782 |
|
|
pos = 0; |
1783 |
|
|
/***** CRITICAL SECTION START *****/ |
1784 |
|
|
spin_lock(&ccs_query_list_lock); |
1785 |
|
|
list_for_each(tmp, &ccs_query_list) { |
1786 |
|
|
struct ccs_query_entry *ptr |
1787 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
1788 |
|
|
if (ptr->answer) |
1789 |
|
|
continue; |
1790 |
|
|
if (pos++ != head->read_step) |
1791 |
|
|
continue; |
1792 |
|
|
/* |
1793 |
|
|
* Some query can be skipped because ccs_query_list |
1794 |
|
|
* can change, but I don't care. |
1795 |
|
|
*/ |
1796 |
|
|
if (len == ptr->query_len) |
1797 |
|
|
memmove(buf, ptr->query, len); |
1798 |
|
|
break; |
1799 |
|
|
} |
1800 |
|
|
spin_unlock(&ccs_query_list_lock); |
1801 |
|
|
/***** CRITICAL SECTION END *****/ |
1802 |
|
|
if (buf[0]) { |
1803 |
|
|
head->read_avail = len; |
1804 |
|
|
head->readbuf_size = head->read_avail; |
1805 |
|
|
head->read_buf = buf; |
1806 |
|
|
head->read_step++; |
1807 |
|
|
} else { |
1808 |
|
|
kfree(buf); |
1809 |
|
|
} |
1810 |
|
|
return 0; |
1811 |
|
|
} |
1812 |
|
|
|
1813 |
|
|
/** |
1814 |
|
|
* ccs_write_answer - Write the supervisor's decision. |
1815 |
|
|
* |
1816 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1817 |
|
|
* |
1818 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1819 |
|
|
*/ |
1820 |
|
|
static int ccs_write_answer(struct ccs_io_buffer *head) |
1821 |
|
|
{ |
1822 |
|
|
char *data = head->write_buf; |
1823 |
|
|
struct list_head *tmp; |
1824 |
|
|
unsigned int serial; |
1825 |
|
|
unsigned int answer; |
1826 |
|
|
/***** CRITICAL SECTION START *****/ |
1827 |
|
|
spin_lock(&ccs_query_list_lock); |
1828 |
|
|
list_for_each(tmp, &ccs_query_list) { |
1829 |
|
|
struct ccs_query_entry *ptr |
1830 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
1831 |
|
|
ptr->timer = 0; |
1832 |
|
|
} |
1833 |
|
|
spin_unlock(&ccs_query_list_lock); |
1834 |
|
|
/***** CRITICAL SECTION END *****/ |
1835 |
|
|
if (sscanf(data, "A%u=%u", &serial, &answer) != 2) |
1836 |
|
|
return -EINVAL; |
1837 |
|
|
/***** CRITICAL SECTION START *****/ |
1838 |
|
|
spin_lock(&ccs_query_list_lock); |
1839 |
|
|
list_for_each(tmp, &ccs_query_list) { |
1840 |
|
|
struct ccs_query_entry *ptr |
1841 |
|
|
= list_entry(tmp, struct ccs_query_entry, list); |
1842 |
|
|
if (ptr->serial != serial) |
1843 |
|
|
continue; |
1844 |
|
|
if (!ptr->answer) |
1845 |
|
|
ptr->answer = answer; |
1846 |
|
|
break; |
1847 |
|
|
} |
1848 |
|
|
spin_unlock(&ccs_query_list_lock); |
1849 |
|
|
/***** CRITICAL SECTION END *****/ |
1850 |
|
|
return 0; |
1851 |
|
|
} |
1852 |
|
|
|
1853 |
|
|
/** |
1854 |
|
|
* ccs_read_version: Get version. |
1855 |
|
|
* |
1856 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1857 |
|
|
* |
1858 |
|
|
* Returns version information. |
1859 |
|
|
*/ |
1860 |
|
|
static int ccs_read_version(struct ccs_io_buffer *head) |
1861 |
|
|
{ |
1862 |
|
|
if (!head->read_eof) { |
1863 |
|
|
ccs_io_printf(head, "1.7.0-pre"); |
1864 |
|
|
head->read_eof = true; |
1865 |
|
|
} |
1866 |
|
|
return 0; |
1867 |
|
|
} |
1868 |
|
|
|
1869 |
|
|
/** |
1870 |
|
|
* ccs_read_self_domain - Get the current process's domainname. |
1871 |
|
|
* |
1872 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1873 |
|
|
* |
1874 |
|
|
* Returns the current process's domainname. |
1875 |
|
|
*/ |
1876 |
|
|
static int ccs_read_self_domain(struct ccs_io_buffer *head) |
1877 |
|
|
{ |
1878 |
|
|
if (!head->read_eof) { |
1879 |
|
|
/* |
1880 |
|
|
* ccs_current_domain()->domainname != NULL |
1881 |
|
|
* because every process belongs to a domain and |
1882 |
|
|
* the domain's name cannot be NULL. |
1883 |
|
|
*/ |
1884 |
|
|
ccs_io_printf(head, "%s", |
1885 |
|
|
ccs_current_domain()->domainname->name); |
1886 |
|
|
head->read_eof = true; |
1887 |
|
|
} |
1888 |
|
|
return 0; |
1889 |
|
|
} |
1890 |
|
|
|
1891 |
|
|
/** |
1892 |
|
|
* ccs_open_control - open() for /proc/ccs/ interface. |
1893 |
|
|
* |
1894 |
|
|
* @type: Type of interface. |
1895 |
|
|
* @file: Pointer to "struct file". |
1896 |
|
|
* |
1897 |
|
|
* Associates policy handler and returns 0 on success, -ENOMEM otherwise. |
1898 |
|
|
*/ |
1899 |
|
|
int ccs_open_control(const u8 type, struct file *file) |
1900 |
|
|
{ |
1901 |
|
|
struct ccs_io_buffer *head = kzalloc(sizeof(*head), GFP_KERNEL); |
1902 |
|
|
if (!head) |
1903 |
|
|
return -ENOMEM; |
1904 |
|
|
mutex_init(&head->io_sem); |
1905 |
|
|
head->type = type; |
1906 |
|
|
switch (type) { |
1907 |
|
|
case CCS_DOMAINPOLICY: /* /proc/ccs/domain_policy */ |
1908 |
|
|
head->write = ccs_write_domain_policy; |
1909 |
|
|
head->read = ccs_read_domain_policy; |
1910 |
|
|
break; |
1911 |
|
|
case CCS_EXCEPTIONPOLICY: /* /proc/ccs/exception_policy */ |
1912 |
|
|
head->write = ccs_write_exception_policy; |
1913 |
|
|
head->read = ccs_read_exception_policy; |
1914 |
|
|
break; |
1915 |
|
|
#ifdef CONFIG_CCSECURITY_AUDIT |
1916 |
|
|
case CCS_GRANTLOG: /* /proc/ccs/grant_log */ |
1917 |
|
|
head->poll = ccs_poll_grant_log; |
1918 |
|
|
head->read = ccs_read_grant_log; |
1919 |
|
|
break; |
1920 |
|
|
case CCS_REJECTLOG: /* /proc/ccs/reject_log */ |
1921 |
|
|
head->poll = ccs_poll_reject_log; |
1922 |
|
|
head->read = ccs_read_reject_log; |
1923 |
|
|
break; |
1924 |
|
|
#endif |
1925 |
|
|
case CCS_SELFDOMAIN: /* /proc/ccs/self_domain */ |
1926 |
|
|
head->read = ccs_read_self_domain; |
1927 |
|
|
break; |
1928 |
|
|
case CCS_DOMAIN_STATUS: /* /proc/ccs/.domain_status */ |
1929 |
|
|
head->write = ccs_write_domain_profile; |
1930 |
|
|
head->read = ccs_read_domain_profile; |
1931 |
|
|
break; |
1932 |
|
|
case CCS_EXECUTE_HANDLER: /* /proc/ccs/.execute_handler */ |
1933 |
|
|
/* Allow execute_handler to read process's status. */ |
1934 |
|
|
if (!(current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER)) { |
1935 |
|
|
kfree(head); |
1936 |
|
|
return -EPERM; |
1937 |
|
|
} |
1938 |
|
|
/* fall through */ |
1939 |
|
|
case CCS_PROCESS_STATUS: /* /proc/ccs/.process_status */ |
1940 |
|
|
head->write = ccs_write_pid; |
1941 |
|
|
head->read = ccs_read_pid; |
1942 |
|
|
break; |
1943 |
|
|
case CCS_VERSION: /* /proc/ccs/version */ |
1944 |
|
|
head->read = ccs_read_version; |
1945 |
|
|
head->readbuf_size = 128; |
1946 |
|
|
break; |
1947 |
|
|
case CCS_MEMINFO: /* /proc/ccs/meminfo */ |
1948 |
|
|
head->write = ccs_write_memory_quota; |
1949 |
|
|
head->read = ccs_read_memory_counter; |
1950 |
|
|
head->readbuf_size = 512; |
1951 |
|
|
break; |
1952 |
|
|
case CCS_PROFILE: /* /proc/ccs/profile */ |
1953 |
|
|
head->write = ccs_write_profile; |
1954 |
|
|
head->read = ccs_read_profile; |
1955 |
|
|
break; |
1956 |
|
|
case CCS_QUERY: /* /proc/ccs/query */ |
1957 |
|
|
head->poll = ccs_poll_query; |
1958 |
|
|
head->write = ccs_write_answer; |
1959 |
|
|
head->read = ccs_read_query; |
1960 |
|
|
break; |
1961 |
|
|
case CCS_MANAGER: /* /proc/ccs/manager */ |
1962 |
|
|
head->write = ccs_write_manager_policy; |
1963 |
|
|
head->read = ccs_read_manager_policy; |
1964 |
|
|
break; |
1965 |
|
|
} |
1966 |
|
|
if (!(file->f_mode & FMODE_READ)) { |
1967 |
|
|
/* |
1968 |
|
|
* No need to allocate read_buf since it is not opened |
1969 |
|
|
* for reading. |
1970 |
|
|
*/ |
1971 |
|
|
head->read = NULL; |
1972 |
|
|
head->poll = NULL; |
1973 |
|
|
} else if (type != CCS_QUERY && |
1974 |
|
|
type != CCS_GRANTLOG && type != CCS_REJECTLOG) { |
1975 |
|
|
/* |
1976 |
|
|
* Don't allocate buffer for reading if the file is one of |
1977 |
|
|
* /proc/ccs/grant_log , /proc/ccs/reject_log , /proc/ccs/query. |
1978 |
|
|
*/ |
1979 |
|
|
if (!head->readbuf_size) |
1980 |
|
|
head->readbuf_size = 4096 * 2; |
1981 |
|
|
head->read_buf = kzalloc(head->readbuf_size, GFP_KERNEL); |
1982 |
|
|
if (!head->read_buf) { |
1983 |
|
|
kfree(head); |
1984 |
|
|
return -ENOMEM; |
1985 |
|
|
} |
1986 |
|
|
} |
1987 |
|
|
if (!(file->f_mode & FMODE_WRITE)) { |
1988 |
|
|
/* |
1989 |
|
|
* No need to allocate write_buf since it is not opened |
1990 |
|
|
* for writing. |
1991 |
|
|
*/ |
1992 |
|
|
head->write = NULL; |
1993 |
|
|
} else if (head->write) { |
1994 |
|
|
head->writebuf_size = 4096 * 2; |
1995 |
|
|
head->write_buf = kzalloc(head->writebuf_size, GFP_KERNEL); |
1996 |
|
|
if (!head->write_buf) { |
1997 |
|
|
kfree(head->read_buf); |
1998 |
|
|
kfree(head); |
1999 |
|
|
return -ENOMEM; |
2000 |
|
|
} |
2001 |
|
|
} |
2002 |
|
|
if (type != CCS_QUERY && |
2003 |
|
|
type != CCS_GRANTLOG && type != CCS_REJECTLOG) |
2004 |
|
|
head->reader_idx = ccs_read_lock(); |
2005 |
|
|
file->private_data = head; |
2006 |
|
|
/* |
2007 |
|
|
* Call the handler now if the file is /proc/ccs/self_domain |
2008 |
|
|
* so that the user can use "cat < /proc/ccs/self_domain" to |
2009 |
|
|
* know the current process's domainname. |
2010 |
|
|
*/ |
2011 |
|
|
if (type == CCS_SELFDOMAIN) |
2012 |
|
|
ccs_read_control(file, NULL, 0); |
2013 |
|
|
/* |
2014 |
|
|
* If the file is /proc/ccs/query , increment the observer counter. |
2015 |
|
|
* The obserber counter is used by ccs_check_supervisor() to see if |
2016 |
|
|
* there is some process monitoring /proc/ccs/query. |
2017 |
|
|
*/ |
2018 |
|
|
else if (type == CCS_QUERY) |
2019 |
|
|
atomic_inc(&ccs_query_observers); |
2020 |
|
|
return 0; |
2021 |
|
|
} |
2022 |
|
|
|
2023 |
|
|
/** |
2024 |
|
|
* ccs_poll_control - poll() for /proc/ccs/ interface. |
2025 |
|
|
* |
2026 |
|
|
* @file: Pointer to "struct file". |
2027 |
|
|
* @wait: Pointer to "poll_table". |
2028 |
|
|
* |
2029 |
|
|
* Waits for read readiness. |
2030 |
|
|
* /proc/ccs/query is handled by /usr/lib/ccs/ccs-queryd and |
2031 |
|
|
* /proc/ccs/grant_log and /proc/ccs/reject_log are handled by |
2032 |
|
|
* /usr/lib/ccs/ccs-auditd. |
2033 |
|
|
*/ |
2034 |
|
|
int ccs_poll_control(struct file *file, poll_table *wait) |
2035 |
|
|
{ |
2036 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2037 |
|
|
if (!head->poll) |
2038 |
|
|
return -ENOSYS; |
2039 |
|
|
return head->poll(file, wait); |
2040 |
|
|
} |
2041 |
|
|
|
2042 |
|
|
/** |
2043 |
|
|
* ccs_read_control - read() for /proc/ccs/ interface. |
2044 |
|
|
* |
2045 |
|
|
* @file: Pointer to "struct file". |
2046 |
|
|
* @buffer: Poiner to buffer to write to. |
2047 |
|
|
* @buffer_len: Size of @buffer. |
2048 |
|
|
* |
2049 |
|
|
* Returns bytes read on success, negative value otherwise. |
2050 |
|
|
*/ |
2051 |
|
|
int ccs_read_control(struct file *file, char __user *buffer, |
2052 |
|
|
const int buffer_len) |
2053 |
|
|
{ |
2054 |
|
|
int len = 0; |
2055 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2056 |
|
|
char *cp; |
2057 |
|
|
if (!head->read) |
2058 |
|
|
return -ENOSYS; |
2059 |
|
|
if (!access_ok(VERIFY_WRITE, buffer, buffer_len)) |
2060 |
|
|
return -EFAULT; |
2061 |
|
|
if (mutex_lock_interruptible(&head->io_sem)) |
2062 |
|
|
return -EINTR; |
2063 |
|
|
/* Call the policy handler. */ |
2064 |
|
|
len = head->read(head); |
2065 |
|
|
if (len < 0) |
2066 |
|
|
goto out; |
2067 |
|
|
/* Write to buffer. */ |
2068 |
|
|
len = head->read_avail; |
2069 |
|
|
if (len > buffer_len) |
2070 |
|
|
len = buffer_len; |
2071 |
|
|
if (!len) |
2072 |
|
|
goto out; |
2073 |
|
|
/* head->read_buf changes by some functions. */ |
2074 |
|
|
cp = head->read_buf; |
2075 |
|
|
if (copy_to_user(buffer, cp, len)) { |
2076 |
|
|
len = -EFAULT; |
2077 |
|
|
goto out; |
2078 |
|
|
} |
2079 |
|
|
head->read_avail -= len; |
2080 |
|
|
memmove(cp, cp + len, head->read_avail); |
2081 |
|
|
out: |
2082 |
|
|
mutex_unlock(&head->io_sem); |
2083 |
|
|
return len; |
2084 |
|
|
} |
2085 |
|
|
|
2086 |
|
|
/** |
2087 |
|
|
* ccs_write_control - write() for /proc/ccs/ interface. |
2088 |
|
|
* |
2089 |
|
|
* @file: Pointer to "struct file". |
2090 |
|
|
* @buffer: Pointer to buffer to read from. |
2091 |
|
|
* @buffer_len: Size of @buffer. |
2092 |
|
|
* |
2093 |
|
|
* Returns @buffer_len on success, negative value otherwise. |
2094 |
|
|
*/ |
2095 |
|
|
int ccs_write_control(struct file *file, const char __user *buffer, |
2096 |
|
|
const int buffer_len) |
2097 |
|
|
{ |
2098 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2099 |
|
|
int error = buffer_len; |
2100 |
|
|
int avail_len = buffer_len; |
2101 |
|
|
char *cp0 = head->write_buf; |
2102 |
|
|
if (!head->write) |
2103 |
|
|
return -ENOSYS; |
2104 |
|
|
if (!access_ok(VERIFY_READ, buffer, buffer_len)) |
2105 |
|
|
return -EFAULT; |
2106 |
|
|
/* Don't allow updating policies by non manager programs. */ |
2107 |
|
|
if (head->write != ccs_write_pid && |
2108 |
|
|
head->write != ccs_write_domain_policy && |
2109 |
|
|
!ccs_is_policy_manager()) |
2110 |
|
|
return -EPERM; |
2111 |
|
|
if (mutex_lock_interruptible(&head->io_sem)) |
2112 |
|
|
return -EINTR; |
2113 |
|
|
/* Read a line and dispatch it to the policy handler. */ |
2114 |
|
|
while (avail_len > 0) { |
2115 |
|
|
char c; |
2116 |
|
|
if (head->write_avail >= head->writebuf_size - 1) { |
2117 |
|
|
error = -ENOMEM; |
2118 |
|
|
break; |
2119 |
|
|
} else if (get_user(c, buffer)) { |
2120 |
|
|
error = -EFAULT; |
2121 |
|
|
break; |
2122 |
|
|
} |
2123 |
|
|
buffer++; |
2124 |
|
|
avail_len--; |
2125 |
|
|
cp0[head->write_avail++] = c; |
2126 |
|
|
if (c != '\n') |
2127 |
|
|
continue; |
2128 |
|
|
cp0[head->write_avail - 1] = '\0'; |
2129 |
|
|
head->write_avail = 0; |
2130 |
|
|
ccs_normalize_line(cp0); |
2131 |
|
|
head->write(head); |
2132 |
|
|
} |
2133 |
|
|
mutex_unlock(&head->io_sem); |
2134 |
|
|
return error; |
2135 |
|
|
} |
2136 |
|
|
|
2137 |
|
|
/** |
2138 |
|
|
* ccs_close_control - close() for /proc/ccs/ interface. |
2139 |
|
|
* |
2140 |
|
|
* @file: Pointer to "struct file". |
2141 |
|
|
* |
2142 |
|
|
* Releases memory and returns 0. |
2143 |
|
|
*/ |
2144 |
|
|
int ccs_close_control(struct file *file) |
2145 |
|
|
{ |
2146 |
|
|
struct ccs_io_buffer *head = file->private_data; |
2147 |
|
|
const bool is_write = head->write_buf != NULL; |
2148 |
|
|
const u8 type = head->type; |
2149 |
|
|
/* |
2150 |
|
|
* If the file is /proc/ccs/query , decrement the observer counter. |
2151 |
|
|
*/ |
2152 |
|
|
if (type == CCS_QUERY) |
2153 |
|
|
atomic_dec(&ccs_query_observers); |
2154 |
|
|
if (type != CCS_QUERY && |
2155 |
|
|
type != CCS_GRANTLOG && type != CCS_REJECTLOG) |
2156 |
|
|
ccs_read_unlock(head->reader_idx); |
2157 |
|
|
/* Release memory used for policy I/O. */ |
2158 |
|
|
kfree(head->read_buf); |
2159 |
|
|
head->read_buf = NULL; |
2160 |
|
|
kfree(head->write_buf); |
2161 |
|
|
head->write_buf = NULL; |
2162 |
|
|
kfree(head); |
2163 |
|
|
head = NULL; |
2164 |
|
|
file->private_data = NULL; |
2165 |
|
|
if (is_write) |
2166 |
|
|
ccs_run_gc(); |
2167 |
|
|
return 0; |
2168 |
|
|
} |