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kumaneko |
2863 |
/* |
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kumaneko |
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* security/ccsecurity/policy_io.c |
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kumaneko |
2863 |
* |
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kumaneko |
3441 |
* Copyright (C) 2005-2010 NTT DATA CORPORATION |
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kumaneko |
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* |
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kumaneko |
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* Version: 1.8.0+ 2010/12/31 |
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kumaneko |
2863 |
*/ |
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#include "internal.h" |
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kumaneko |
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
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/** |
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* __wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses. |
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* |
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* @wq: The waitqueue to wait on. |
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* @condition: A C expression for the event to wait for. |
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* @ret: Timeout, in jiffies. |
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* |
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* Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a |
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* signal, and the remaining jiffies otherwise if the condition evaluated to |
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* true before the timeout elapsed. |
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* |
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* This is for compatibility with older kernels. |
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*/ |
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#define __wait_event_interruptible_timeout(wq, condition, ret) \ |
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do { \ |
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wait_queue_t __wait; \ |
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init_waitqueue_entry(&__wait, current); \ |
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\ |
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add_wait_queue(&wq, &__wait); \ |
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for (;;) { \ |
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set_current_state(TASK_INTERRUPTIBLE); \ |
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if (condition) \ |
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break; \ |
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if (!signal_pending(current)) { \ |
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ret = schedule_timeout(ret); \ |
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if (!ret) \ |
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break; \ |
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continue; \ |
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} \ |
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ret = -ERESTARTSYS; \ |
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break; \ |
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} \ |
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current->state = TASK_RUNNING; \ |
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remove_wait_queue(&wq, &__wait); \ |
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} while (0) |
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/** |
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* wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses. |
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* |
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* @wq: The waitqueue to wait on. |
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* @condition: A C expression for the event to wait for. |
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* @timeout: Timeout, in jiffies. |
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* |
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* Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a |
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* signal, and the remaining jiffies otherwise if the condition evaluated to |
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* true before the timeout elapsed. |
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* |
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* This is for compatibility with older kernels. |
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*/ |
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#define wait_event_interruptible_timeout(wq, condition, timeout) \ |
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({ \ |
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long __ret = timeout; \ |
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if (!(condition)) \ |
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__wait_event_interruptible_timeout(wq, condition, __ret); \ |
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__ret; \ |
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}) |
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#endif |
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/** |
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* list_for_each_cookie - iterate over a list with cookie. |
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* |
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* @pos: Pointer to "struct list_head". |
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* @head: Pointer to "struct list_head". |
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*/ |
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#define list_for_each_cookie(pos, head) \ |
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for (pos = pos ? pos : srcu_dereference((head)->next, &ccs_ss); \ |
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pos != (head); pos = srcu_dereference(pos->next, &ccs_ss)) |
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kumaneko |
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/* Profile version. Currently only 20100903 is defined. */ |
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kumaneko |
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static unsigned int ccs_profile_version; |
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kumaneko |
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/* Profile table. Memory is allocated as needed. */ |
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static struct ccs_profile *ccs_profile_ptr[CCS_MAX_PROFILES]; |
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kumaneko |
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/* String table for operation mode. */ |
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kumaneko |
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const char * const ccs_mode[CCS_CONFIG_MAX_MODE] = { |
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[CCS_CONFIG_DISABLED] = "disabled", |
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[CCS_CONFIG_LEARNING] = "learning", |
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[CCS_CONFIG_PERMISSIVE] = "permissive", |
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[CCS_CONFIG_ENFORCING] = "enforcing" |
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kumaneko |
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}; |
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|
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/* String table for /proc/ccs/profile interface. */ |
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const char * const ccs_mac_keywords[CCS_MAX_MAC_INDEX |
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+ CCS_MAX_MAC_CATEGORY_INDEX] = { |
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kumaneko |
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/* CONFIG::file group */ |
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[CCS_MAC_FILE_EXECUTE] = "execute", |
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[CCS_MAC_FILE_OPEN] = "open", |
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[CCS_MAC_FILE_CREATE] = "create", |
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[CCS_MAC_FILE_UNLINK] = "unlink", |
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[CCS_MAC_FILE_GETATTR] = "getattr", |
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[CCS_MAC_FILE_MKDIR] = "mkdir", |
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[CCS_MAC_FILE_RMDIR] = "rmdir", |
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[CCS_MAC_FILE_MKFIFO] = "mkfifo", |
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[CCS_MAC_FILE_MKSOCK] = "mksock", |
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[CCS_MAC_FILE_TRUNCATE] = "truncate", |
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[CCS_MAC_FILE_SYMLINK] = "symlink", |
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[CCS_MAC_FILE_MKBLOCK] = "mkblock", |
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[CCS_MAC_FILE_MKCHAR] = "mkchar", |
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[CCS_MAC_FILE_LINK] = "link", |
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[CCS_MAC_FILE_RENAME] = "rename", |
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[CCS_MAC_FILE_CHMOD] = "chmod", |
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kumaneko |
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[CCS_MAC_FILE_CHOWN] = "chown", |
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kumaneko |
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[CCS_MAC_FILE_CHGRP] = "chgrp", |
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[CCS_MAC_FILE_IOCTL] = "ioctl", |
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[CCS_MAC_FILE_CHROOT] = "chroot", |
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[CCS_MAC_FILE_MOUNT] = "mount", |
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[CCS_MAC_FILE_UMOUNT] = "unmount", |
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[CCS_MAC_FILE_PIVOT_ROOT] = "pivot_root", |
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kumaneko |
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/* CONFIG::misc group */ |
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kumaneko |
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[CCS_MAC_ENVIRON] = "env", |
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kumaneko |
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/* CONFIG::network group */ |
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kumaneko |
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[CCS_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind", |
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[CCS_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen", |
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[CCS_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect", |
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[CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = "inet_stream_accept", |
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[CCS_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind", |
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[CCS_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send", |
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[CCS_MAC_NETWORK_INET_DGRAM_RECV] = "inet_dgram_recv", |
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[CCS_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", |
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[CCS_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", |
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[CCS_MAC_NETWORK_INET_RAW_RECV] = "inet_raw_recv", |
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[CCS_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", |
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[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", |
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[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", |
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[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = "unix_stream_accept", |
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[CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", |
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[CCS_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", |
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[CCS_MAC_NETWORK_UNIX_DGRAM_RECV] = "unix_dgram_recv", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = "unix_seqpacket_accept", |
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kumaneko |
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/* CONFIG::ipc group */ |
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kumaneko |
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[CCS_MAC_SIGNAL] = "signal", |
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kumaneko |
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/* CONFIG::capability group */ |
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kumaneko |
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[CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET] = "use_route", |
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[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = "use_packet", |
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[CCS_MAC_CAPABILITY_SYS_REBOOT] = "SYS_REBOOT", |
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[CCS_MAC_CAPABILITY_SYS_VHANGUP] = "SYS_VHANGUP", |
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[CCS_MAC_CAPABILITY_SYS_SETTIME] = "SYS_TIME", |
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[CCS_MAC_CAPABILITY_SYS_NICE] = "SYS_NICE", |
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[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
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[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = "use_kernel_module", |
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[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
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[CCS_MAC_CAPABILITY_SYS_PTRACE] = "SYS_PTRACE", |
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kumaneko |
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/* CONFIG group */ |
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kumaneko |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_FILE] = "file", |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_NETWORK] = "network", |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_MISC] = "misc", |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_IPC] = "ipc", |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
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kumaneko |
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}; |
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kumaneko |
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/* String table for path operation. */ |
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kumaneko |
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const char * const ccs_path_keyword[CCS_MAX_PATH_OPERATION] = { |
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[CCS_TYPE_EXECUTE] = "execute", |
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[CCS_TYPE_READ] = "read", |
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[CCS_TYPE_WRITE] = "write", |
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[CCS_TYPE_APPEND] = "append", |
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[CCS_TYPE_UNLINK] = "unlink", |
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kumaneko |
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[CCS_TYPE_GETATTR] = "getattr", |
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kumaneko |
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[CCS_TYPE_RMDIR] = "rmdir", |
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[CCS_TYPE_TRUNCATE] = "truncate", |
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[CCS_TYPE_SYMLINK] = "symlink", |
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[CCS_TYPE_CHROOT] = "chroot", |
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[CCS_TYPE_UMOUNT] = "unmount", |
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}; |
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kumaneko |
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/* String table for categories. */ |
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kumaneko |
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static const char * const ccs_category_keywords[CCS_MAX_MAC_CATEGORY_INDEX] = { |
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[CCS_MAC_CATEGORY_FILE] = "file", |
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[CCS_MAC_CATEGORY_NETWORK] = "network", |
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[CCS_MAC_CATEGORY_MISC] = "misc", |
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[CCS_MAC_CATEGORY_IPC] = "ipc", |
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[CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
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}; |
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kumaneko |
4063 |
/* String table for conditions. */ |
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kumaneko |
3968 |
const char * const ccs_condition_keyword[CCS_MAX_CONDITION_KEYWORD] = { |
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[CCS_TASK_UID] = "task.uid", |
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[CCS_TASK_EUID] = "task.euid", |
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[CCS_TASK_SUID] = "task.suid", |
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[CCS_TASK_FSUID] = "task.fsuid", |
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[CCS_TASK_GID] = "task.gid", |
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[CCS_TASK_EGID] = "task.egid", |
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[CCS_TASK_SGID] = "task.sgid", |
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[CCS_TASK_FSGID] = "task.fsgid", |
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[CCS_TASK_PID] = "task.pid", |
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[CCS_TASK_PPID] = "task.ppid", |
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[CCS_EXEC_ARGC] = "exec.argc", |
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[CCS_EXEC_ENVC] = "exec.envc", |
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[CCS_TYPE_IS_SOCKET] = "socket", |
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[CCS_TYPE_IS_SYMLINK] = "symlink", |
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[CCS_TYPE_IS_FILE] = "file", |
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[CCS_TYPE_IS_BLOCK_DEV] = "block", |
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[CCS_TYPE_IS_DIRECTORY] = "directory", |
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[CCS_TYPE_IS_CHAR_DEV] = "char", |
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[CCS_TYPE_IS_FIFO] = "fifo", |
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[CCS_MODE_SETUID] = "setuid", |
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[CCS_MODE_SETGID] = "setgid", |
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[CCS_MODE_STICKY] = "sticky", |
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[CCS_MODE_OWNER_READ] = "owner_read", |
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[CCS_MODE_OWNER_WRITE] = "owner_write", |
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[CCS_MODE_OWNER_EXECUTE] = "owner_execute", |
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[CCS_MODE_GROUP_READ] = "group_read", |
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[CCS_MODE_GROUP_WRITE] = "group_write", |
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[CCS_MODE_GROUP_EXECUTE] = "group_execute", |
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[CCS_MODE_OTHERS_READ] = "others_read", |
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[CCS_MODE_OTHERS_WRITE] = "others_write", |
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[CCS_MODE_OTHERS_EXECUTE] = "others_execute", |
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[CCS_TASK_TYPE] = "task.type", |
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[CCS_TASK_EXECUTE_HANDLER] = "execute_handler", |
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[CCS_EXEC_REALPATH] = "exec.realpath", |
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[CCS_SYMLINK_TARGET] = "symlink.target", |
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[CCS_PATH1_UID] = "path1.uid", |
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[CCS_PATH1_GID] = "path1.gid", |
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[CCS_PATH1_INO] = "path1.ino", |
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[CCS_PATH1_MAJOR] = "path1.major", |
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[CCS_PATH1_MINOR] = "path1.minor", |
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[CCS_PATH1_PERM] = "path1.perm", |
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[CCS_PATH1_TYPE] = "path1.type", |
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[CCS_PATH1_DEV_MAJOR] = "path1.dev_major", |
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[CCS_PATH1_DEV_MINOR] = "path1.dev_minor", |
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[CCS_PATH2_UID] = "path2.uid", |
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[CCS_PATH2_GID] = "path2.gid", |
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[CCS_PATH2_INO] = "path2.ino", |
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[CCS_PATH2_MAJOR] = "path2.major", |
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[CCS_PATH2_MINOR] = "path2.minor", |
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[CCS_PATH2_PERM] = "path2.perm", |
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[CCS_PATH2_TYPE] = "path2.type", |
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[CCS_PATH2_DEV_MAJOR] = "path2.dev_major", |
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[CCS_PATH2_DEV_MINOR] = "path2.dev_minor", |
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[CCS_PATH1_PARENT_UID] = "path1.parent.uid", |
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[CCS_PATH1_PARENT_GID] = "path1.parent.gid", |
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[CCS_PATH1_PARENT_INO] = "path1.parent.ino", |
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[CCS_PATH1_PARENT_PERM] = "path1.parent.perm", |
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[CCS_PATH2_PARENT_UID] = "path2.parent.uid", |
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[CCS_PATH2_PARENT_GID] = "path2.parent.gid", |
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[CCS_PATH2_PARENT_INO] = "path2.parent.ino", |
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[CCS_PATH2_PARENT_PERM] = "path2.parent.perm", |
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}; |
257 |
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258 |
kumaneko |
4063 |
/* String table for PREFERENCE keyword. */ |
259 |
kumaneko |
4049 |
static const char * const ccs_pref_keywords[CCS_MAX_PREF] = { |
260 |
kumaneko |
4170 |
[CCS_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
261 |
kumaneko |
4049 |
[CCS_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
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[CCS_PREF_ENFORCING_PENALTY] = "enforcing_penalty", |
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}; |
264 |
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265 |
kumaneko |
2863 |
/* Permit policy management by non-root user? */ |
266 |
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static bool ccs_manage_by_non_root; |
267 |
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/** |
269 |
kumaneko |
2958 |
* ccs_yesno - Return "yes" or "no". |
270 |
kumaneko |
2863 |
* |
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kumaneko |
2958 |
* @value: Bool value. |
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kumaneko |
4063 |
* |
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* Returns "yes" if @value is not 0, "no" otherwise. |
274 |
kumaneko |
2863 |
*/ |
275 |
kumaneko |
4170 |
const char *ccs_yesno(const unsigned int value) |
276 |
kumaneko |
2863 |
{ |
277 |
kumaneko |
2958 |
return value ? "yes" : "no"; |
278 |
kumaneko |
2863 |
} |
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280 |
kumaneko |
4063 |
/* Prototype fpr ccs_addprintf(). */ |
281 |
kumaneko |
3780 |
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...) |
282 |
kumaneko |
4063 |
__attribute__ ((format(printf, 3, 4))); |
283 |
kumaneko |
4049 |
|
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kumaneko |
4063 |
/** |
285 |
kumaneko |
4084 |
* ccs_addprintf - strncat()-like-snprintf(). |
286 |
kumaneko |
4063 |
* |
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* @buffer: Buffer to write to. Must be '\0'-terminated. |
288 |
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* @len: Size of @buffer. |
289 |
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* @fmt: The printf()'s format string, followed by parameters. |
290 |
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* |
291 |
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* Returns nothing. |
292 |
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*/ |
293 |
kumaneko |
4049 |
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...) |
294 |
kumaneko |
3780 |
{ |
295 |
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va_list args; |
296 |
|
|
const int pos = strlen(buffer); |
297 |
|
|
va_start(args, fmt); |
298 |
|
|
vsnprintf(buffer + pos, len - pos - 1, fmt, args); |
299 |
|
|
va_end(args); |
300 |
|
|
} |
301 |
|
|
|
302 |
kumaneko |
2863 |
/** |
303 |
kumaneko |
3780 |
* ccs_flush - Flush queued string to userspace's buffer. |
304 |
kumaneko |
2863 |
* |
305 |
kumaneko |
4063 |
* @head: Pointer to "struct ccs_io_buffer". |
306 |
kumaneko |
2863 |
* |
307 |
kumaneko |
3780 |
* Returns true if all data was flushed, false otherwise. |
308 |
|
|
*/ |
309 |
|
|
static bool ccs_flush(struct ccs_io_buffer *head) |
310 |
|
|
{ |
311 |
|
|
while (head->r.w_pos) { |
312 |
|
|
const char *w = head->r.w[0]; |
313 |
|
|
int len = strlen(w); |
314 |
|
|
if (len) { |
315 |
|
|
if (len > head->read_user_buf_avail) |
316 |
|
|
len = head->read_user_buf_avail; |
317 |
|
|
if (!len) |
318 |
|
|
return false; |
319 |
|
|
if (copy_to_user(head->read_user_buf, w, len)) |
320 |
|
|
return false; |
321 |
|
|
head->read_user_buf_avail -= len; |
322 |
|
|
head->read_user_buf += len; |
323 |
|
|
w += len; |
324 |
|
|
} |
325 |
|
|
if (*w) { |
326 |
|
|
head->r.w[0] = w; |
327 |
|
|
return false; |
328 |
|
|
} |
329 |
|
|
/* Add '\0' for audit logs and query. */ |
330 |
|
|
if (head->poll) { |
331 |
|
|
if (!head->read_user_buf_avail || |
332 |
|
|
copy_to_user(head->read_user_buf, "", 1)) |
333 |
|
|
return false; |
334 |
|
|
head->read_user_buf_avail--; |
335 |
|
|
head->read_user_buf++; |
336 |
|
|
} |
337 |
|
|
head->r.w_pos--; |
338 |
|
|
for (len = 0; len < head->r.w_pos; len++) |
339 |
|
|
head->r.w[len] = head->r.w[len + 1]; |
340 |
|
|
} |
341 |
|
|
head->r.avail = 0; |
342 |
|
|
return true; |
343 |
|
|
} |
344 |
|
|
|
345 |
|
|
/** |
346 |
|
|
* ccs_set_string - Queue string to "struct ccs_io_buffer" structure. |
347 |
kumaneko |
2863 |
* |
348 |
kumaneko |
3780 |
* @head: Pointer to "struct ccs_io_buffer". |
349 |
|
|
* @string: String to print. |
350 |
|
|
* |
351 |
kumaneko |
4084 |
* Returns nothing. |
352 |
|
|
* |
353 |
kumaneko |
3780 |
* Note that @string has to be kept valid until @head is kfree()d. |
354 |
|
|
* This means that char[] allocated on stack memory cannot be passed to |
355 |
|
|
* this function. Use ccs_io_printf() for char[] allocated on stack memory. |
356 |
kumaneko |
2863 |
*/ |
357 |
kumaneko |
3780 |
static void ccs_set_string(struct ccs_io_buffer *head, const char *string) |
358 |
kumaneko |
2863 |
{ |
359 |
kumaneko |
3780 |
if (head->r.w_pos < CCS_MAX_IO_READ_QUEUE) { |
360 |
|
|
head->r.w[head->r.w_pos++] = string; |
361 |
|
|
ccs_flush(head); |
362 |
|
|
} else |
363 |
kumaneko |
3829 |
printk(KERN_WARNING "Too many words in a line.\n"); |
364 |
kumaneko |
3780 |
} |
365 |
|
|
|
366 |
|
|
/** |
367 |
|
|
* ccs_io_printf - printf() to "struct ccs_io_buffer" structure. |
368 |
|
|
* |
369 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
370 |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
371 |
kumaneko |
4063 |
* |
372 |
|
|
* Returns nothing. |
373 |
kumaneko |
3780 |
*/ |
374 |
|
|
void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
375 |
|
|
{ |
376 |
kumaneko |
2863 |
va_list args; |
377 |
|
|
int len; |
378 |
kumaneko |
3780 |
int pos = head->r.avail; |
379 |
kumaneko |
2863 |
int size = head->readbuf_size - pos; |
380 |
|
|
if (size <= 0) |
381 |
kumaneko |
3780 |
return; |
382 |
kumaneko |
2863 |
va_start(args, fmt); |
383 |
kumaneko |
3780 |
len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
384 |
kumaneko |
2863 |
va_end(args); |
385 |
kumaneko |
3780 |
if (pos + len >= head->readbuf_size) { |
386 |
kumaneko |
3829 |
printk(KERN_WARNING "Too many words in a line.\n"); |
387 |
kumaneko |
3780 |
return; |
388 |
|
|
} |
389 |
|
|
head->r.avail += len; |
390 |
|
|
ccs_set_string(head, head->read_buf + pos); |
391 |
kumaneko |
2863 |
} |
392 |
|
|
|
393 |
kumaneko |
4063 |
/** |
394 |
|
|
* ccs_set_space - Put a space to "struct ccs_io_buffer" structure. |
395 |
|
|
* |
396 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
397 |
|
|
* |
398 |
|
|
* Returns nothing. |
399 |
|
|
*/ |
400 |
kumaneko |
3780 |
static void ccs_set_space(struct ccs_io_buffer *head) |
401 |
|
|
{ |
402 |
|
|
ccs_set_string(head, " "); |
403 |
|
|
} |
404 |
|
|
|
405 |
kumaneko |
4063 |
/** |
406 |
|
|
* ccs_set_lf - Put a line feed to "struct ccs_io_buffer" structure. |
407 |
|
|
* |
408 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
409 |
|
|
* |
410 |
|
|
* Returns nothing. |
411 |
|
|
*/ |
412 |
kumaneko |
3780 |
static bool ccs_set_lf(struct ccs_io_buffer *head) |
413 |
|
|
{ |
414 |
|
|
ccs_set_string(head, "\n"); |
415 |
|
|
return !head->r.w_pos; |
416 |
|
|
} |
417 |
|
|
|
418 |
kumaneko |
2863 |
/** |
419 |
kumaneko |
3694 |
* ccs_assign_profile - Create a new profile. |
420 |
kumaneko |
2863 |
* |
421 |
|
|
* @profile: Profile number to create. |
422 |
|
|
* |
423 |
|
|
* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
424 |
|
|
*/ |
425 |
kumaneko |
3694 |
static struct ccs_profile *ccs_assign_profile(const unsigned int profile) |
426 |
kumaneko |
2863 |
{ |
427 |
|
|
struct ccs_profile *ptr; |
428 |
|
|
struct ccs_profile *entry; |
429 |
kumaneko |
2892 |
if (profile >= CCS_MAX_PROFILES) |
430 |
kumaneko |
2863 |
return NULL; |
431 |
|
|
ptr = ccs_profile_ptr[profile]; |
432 |
|
|
if (ptr) |
433 |
|
|
return ptr; |
434 |
kumaneko |
3512 |
entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS); |
435 |
kumaneko |
3534 |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
436 |
|
|
goto out; |
437 |
kumaneko |
2863 |
ptr = ccs_profile_ptr[profile]; |
438 |
|
|
if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
439 |
|
|
ptr = entry; |
440 |
kumaneko |
2958 |
ptr->default_config = CCS_CONFIG_DISABLED | |
441 |
|
|
CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG; |
442 |
|
|
memset(ptr->config, CCS_CONFIG_USE_DEFAULT, |
443 |
kumaneko |
2943 |
sizeof(ptr->config)); |
444 |
kumaneko |
4170 |
ptr->pref[CCS_PREF_MAX_AUDIT_LOG] = |
445 |
|
|
CONFIG_CCSECURITY_MAX_AUDIT_LOG; |
446 |
kumaneko |
4049 |
ptr->pref[CCS_PREF_MAX_LEARNING_ENTRY] = |
447 |
|
|
CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY; |
448 |
kumaneko |
2863 |
mb(); /* Avoid out-of-order execution. */ |
449 |
|
|
ccs_profile_ptr[profile] = ptr; |
450 |
|
|
entry = NULL; |
451 |
|
|
} |
452 |
|
|
mutex_unlock(&ccs_policy_lock); |
453 |
kumaneko |
4049 |
out: |
454 |
kumaneko |
2863 |
kfree(entry); |
455 |
|
|
return ptr; |
456 |
|
|
} |
457 |
|
|
|
458 |
|
|
/** |
459 |
kumaneko |
2991 |
* ccs_check_profile - Check all profiles currently assigned to domains are defined. |
460 |
kumaneko |
4063 |
* |
461 |
|
|
* Returns nothing. |
462 |
kumaneko |
2991 |
*/ |
463 |
kumaneko |
3502 |
static void ccs_check_profile(void) |
464 |
kumaneko |
2991 |
{ |
465 |
|
|
struct ccs_domain_info *domain; |
466 |
kumaneko |
3535 |
const int idx = ccs_read_lock(); |
467 |
kumaneko |
2991 |
ccs_policy_loaded = true; |
468 |
kumaneko |
4049 |
list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) { |
469 |
kumaneko |
2991 |
const u8 profile = domain->profile; |
470 |
|
|
if (ccs_profile_ptr[profile]) |
471 |
|
|
continue; |
472 |
jnguyen |
4236 |
printk(KERN_ERR "Profile %u must be defined before using it.\n", |
473 |
kumaneko |
4053 |
profile); |
474 |
|
|
printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/1.8/ " |
475 |
|
|
"for more information.\n"); |
476 |
kumaneko |
2991 |
panic("Profile %u (used by '%s') not defined.\n", |
477 |
|
|
profile, domain->domainname->name); |
478 |
|
|
} |
479 |
kumaneko |
3535 |
ccs_read_unlock(idx); |
480 |
kumaneko |
4053 |
if (ccs_profile_version != 20100903) { |
481 |
jnguyen |
4236 |
printk(KERN_ERR "Userland tools must be installed for " |
482 |
|
|
"TOMOYO 1.8, and policy must be initialized.\n"); |
483 |
kumaneko |
4053 |
printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/1.8/ " |
484 |
|
|
"for more information.\n"); |
485 |
kumaneko |
3158 |
panic("Profile version %u is not supported.\n", |
486 |
|
|
ccs_profile_version); |
487 |
kumaneko |
4053 |
} |
488 |
kumaneko |
4280 |
printk(KERN_INFO "CCSecurity: 1.8.0+ 2010/12/31\n"); |
489 |
kumaneko |
3502 |
printk(KERN_INFO "Mandatory Access Control activated.\n"); |
490 |
kumaneko |
2991 |
} |
491 |
|
|
|
492 |
|
|
/** |
493 |
kumaneko |
2958 |
* ccs_profile - Find a profile. |
494 |
|
|
* |
495 |
|
|
* @profile: Profile number to find. |
496 |
|
|
* |
497 |
kumaneko |
2991 |
* Returns pointer to "struct ccs_profile". |
498 |
kumaneko |
2958 |
*/ |
499 |
|
|
struct ccs_profile *ccs_profile(const u8 profile) |
500 |
|
|
{ |
501 |
kumaneko |
3961 |
static struct ccs_profile ccs_null_profile; |
502 |
kumaneko |
2974 |
struct ccs_profile *ptr = ccs_profile_ptr[profile]; |
503 |
kumaneko |
3961 |
if (!ptr) |
504 |
|
|
ptr = &ccs_null_profile; |
505 |
kumaneko |
2974 |
return ptr; |
506 |
kumaneko |
2958 |
} |
507 |
|
|
|
508 |
kumaneko |
4063 |
/** |
509 |
|
|
* ccs_find_yesno - Find values for specified keyword. |
510 |
|
|
* |
511 |
|
|
* @string: String to check. |
512 |
|
|
* @find: Name of keyword. |
513 |
|
|
* |
514 |
|
|
* Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. |
515 |
|
|
*/ |
516 |
kumaneko |
3747 |
static s8 ccs_find_yesno(const char *string, const char *find) |
517 |
kumaneko |
2863 |
{ |
518 |
kumaneko |
3747 |
const char *cp = strstr(string, find); |
519 |
|
|
if (cp) { |
520 |
|
|
cp += strlen(find); |
521 |
kumaneko |
3758 |
if (!strncmp(cp, "=yes", 4)) |
522 |
kumaneko |
3747 |
return 1; |
523 |
kumaneko |
3758 |
else if (!strncmp(cp, "=no", 3)) |
524 |
kumaneko |
3747 |
return 0; |
525 |
kumaneko |
2863 |
} |
526 |
kumaneko |
3747 |
return -1; |
527 |
|
|
} |
528 |
|
|
|
529 |
kumaneko |
4063 |
/** |
530 |
|
|
* ccs_set_uint - Set value for specified preference. |
531 |
|
|
* |
532 |
|
|
* @i: Pointer to "unsigned int". |
533 |
|
|
* @string: String to check. |
534 |
|
|
* @find: Name of keyword. |
535 |
|
|
* |
536 |
|
|
* Returns nothing. |
537 |
|
|
*/ |
538 |
kumaneko |
3747 |
static void ccs_set_uint(unsigned int *i, const char *string, const char *find) |
539 |
|
|
{ |
540 |
|
|
const char *cp = strstr(string, find); |
541 |
|
|
if (cp) |
542 |
|
|
sscanf(cp + strlen(find), "=%u", i); |
543 |
|
|
} |
544 |
|
|
|
545 |
kumaneko |
4063 |
/** |
546 |
|
|
* ccs_set_mode - Set mode for specified profile. |
547 |
|
|
* |
548 |
|
|
* @name: Name of functionality. |
549 |
|
|
* @value: Mode for @name. |
550 |
|
|
* @profile: Pointer to "struct ccs_profile". |
551 |
|
|
* |
552 |
|
|
* Returns 0 on success, negative value otherwise. |
553 |
|
|
*/ |
554 |
kumaneko |
3870 |
static int ccs_set_mode(char *name, const char *value, |
555 |
kumaneko |
3758 |
struct ccs_profile *profile) |
556 |
kumaneko |
3747 |
{ |
557 |
|
|
u8 i; |
558 |
|
|
u8 config; |
559 |
kumaneko |
3758 |
if (!strcmp(name, "CONFIG")) { |
560 |
kumaneko |
3968 |
i = CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX; |
561 |
kumaneko |
2958 |
config = profile->default_config; |
562 |
kumaneko |
3758 |
} else if (ccs_str_starts(&name, "CONFIG::")) { |
563 |
kumaneko |
2958 |
config = 0; |
564 |
kumaneko |
3968 |
for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX; |
565 |
|
|
i++) { |
566 |
|
|
int len = 0; |
567 |
|
|
if (i < CCS_MAX_MAC_INDEX) { |
568 |
|
|
const u8 c = ccs_index2category[i]; |
569 |
kumaneko |
4049 |
const char *category = |
570 |
|
|
ccs_category_keywords[c]; |
571 |
kumaneko |
3968 |
len = strlen(category); |
572 |
|
|
if (strncmp(name, category, len) || |
573 |
|
|
name[len++] != ':' || name[len++] != ':') |
574 |
|
|
continue; |
575 |
|
|
} |
576 |
|
|
if (strcmp(name + len, ccs_mac_keywords[i])) |
577 |
kumaneko |
2943 |
continue; |
578 |
kumaneko |
2958 |
config = profile->config[i]; |
579 |
kumaneko |
2943 |
break; |
580 |
|
|
} |
581 |
kumaneko |
3968 |
if (i == CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX) |
582 |
kumaneko |
2958 |
return -EINVAL; |
583 |
|
|
} else { |
584 |
|
|
return -EINVAL; |
585 |
|
|
} |
586 |
kumaneko |
3870 |
if (strstr(value, "use_default")) { |
587 |
kumaneko |
2958 |
config = CCS_CONFIG_USE_DEFAULT; |
588 |
|
|
} else { |
589 |
kumaneko |
3747 |
u8 mode; |
590 |
kumaneko |
3758 |
for (mode = 0; mode < CCS_CONFIG_MAX_MODE; mode++) |
591 |
|
|
if (strstr(value, ccs_mode[mode])) |
592 |
kumaneko |
2958 |
/* |
593 |
|
|
* Update lower 3 bits in order to distinguish |
594 |
|
|
* 'config' from 'CCS_CONFIG_USE_DEAFULT'. |
595 |
|
|
*/ |
596 |
|
|
config = (config & ~7) | mode; |
597 |
kumaneko |
3870 |
if (config != CCS_CONFIG_USE_DEFAULT) { |
598 |
kumaneko |
3758 |
switch (ccs_find_yesno(value, "grant_log")) { |
599 |
kumaneko |
3747 |
case 1: |
600 |
kumaneko |
2958 |
config |= CCS_CONFIG_WANT_GRANT_LOG; |
601 |
kumaneko |
3747 |
break; |
602 |
|
|
case 0: |
603 |
kumaneko |
2958 |
config &= ~CCS_CONFIG_WANT_GRANT_LOG; |
604 |
kumaneko |
3747 |
break; |
605 |
|
|
} |
606 |
kumaneko |
3758 |
switch (ccs_find_yesno(value, "reject_log")) { |
607 |
kumaneko |
3747 |
case 1: |
608 |
kumaneko |
2958 |
config |= CCS_CONFIG_WANT_REJECT_LOG; |
609 |
kumaneko |
3747 |
break; |
610 |
|
|
case 0: |
611 |
kumaneko |
2958 |
config &= ~CCS_CONFIG_WANT_REJECT_LOG; |
612 |
kumaneko |
3747 |
break; |
613 |
|
|
} |
614 |
kumaneko |
3968 |
} |
615 |
kumaneko |
2958 |
} |
616 |
kumaneko |
3968 |
if (i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX) |
617 |
kumaneko |
2958 |
profile->config[i] = config; |
618 |
|
|
else if (config != CCS_CONFIG_USE_DEFAULT) |
619 |
|
|
profile->default_config = config; |
620 |
kumaneko |
2943 |
return 0; |
621 |
kumaneko |
2863 |
} |
622 |
|
|
|
623 |
kumaneko |
3747 |
/** |
624 |
|
|
* ccs_write_profile - Write profile table. |
625 |
|
|
* |
626 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
627 |
|
|
* |
628 |
|
|
* Returns 0 on success, negative value otherwise. |
629 |
|
|
*/ |
630 |
|
|
static int ccs_write_profile(struct ccs_io_buffer *head) |
631 |
|
|
{ |
632 |
|
|
char *data = head->write_buf; |
633 |
kumaneko |
3781 |
unsigned int i; |
634 |
kumaneko |
3747 |
char *cp; |
635 |
|
|
struct ccs_profile *profile; |
636 |
|
|
if (sscanf(data, "PROFILE_VERSION=%u", &ccs_profile_version) == 1) |
637 |
|
|
return 0; |
638 |
|
|
i = simple_strtoul(data, &cp, 10); |
639 |
kumaneko |
3870 |
if (*cp != '-') |
640 |
|
|
return -EINVAL; |
641 |
|
|
data = cp + 1; |
642 |
|
|
profile = ccs_assign_profile(i); |
643 |
|
|
if (!profile) |
644 |
|
|
return -EINVAL; |
645 |
kumaneko |
3747 |
cp = strchr(data, '='); |
646 |
|
|
if (!cp) |
647 |
|
|
return -EINVAL; |
648 |
|
|
*cp++ = '\0'; |
649 |
|
|
if (!strcmp(data, "COMMENT")) { |
650 |
|
|
const struct ccs_path_info *old_comment = profile->comment; |
651 |
|
|
profile->comment = ccs_get_name(cp); |
652 |
|
|
ccs_put_name(old_comment); |
653 |
|
|
return 0; |
654 |
|
|
} |
655 |
kumaneko |
4049 |
if (!strcmp(data, "PREFERENCE")) { |
656 |
|
|
for (i = 0; i < CCS_MAX_PREF; i++) |
657 |
|
|
ccs_set_uint(&profile->pref[i], cp, |
658 |
|
|
ccs_pref_keywords[i]); |
659 |
|
|
return 0; |
660 |
|
|
} |
661 |
kumaneko |
3870 |
return ccs_set_mode(data, cp, profile); |
662 |
kumaneko |
3747 |
} |
663 |
|
|
|
664 |
kumaneko |
4063 |
/** |
665 |
|
|
* ccs_print_config - Print mode for specified functionality. |
666 |
|
|
* |
667 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
668 |
|
|
* @config: Mode for that functionality. |
669 |
|
|
* |
670 |
|
|
* Returns nothing. |
671 |
|
|
* |
672 |
|
|
* Caller prints functionality's name. |
673 |
|
|
*/ |
674 |
kumaneko |
3780 |
static void ccs_print_config(struct ccs_io_buffer *head, const u8 config) |
675 |
|
|
{ |
676 |
kumaneko |
4049 |
ccs_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
677 |
|
|
ccs_mode[config & 3], |
678 |
kumaneko |
3780 |
ccs_yesno(config & CCS_CONFIG_WANT_GRANT_LOG), |
679 |
|
|
ccs_yesno(config & CCS_CONFIG_WANT_REJECT_LOG)); |
680 |
|
|
} |
681 |
|
|
|
682 |
kumaneko |
2863 |
/** |
683 |
|
|
* ccs_read_profile - Read profile table. |
684 |
|
|
* |
685 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
686 |
kumaneko |
4084 |
* |
687 |
|
|
* Returns nothing. |
688 |
kumaneko |
2863 |
*/ |
689 |
kumaneko |
2943 |
static void ccs_read_profile(struct ccs_io_buffer *head) |
690 |
kumaneko |
2863 |
{ |
691 |
kumaneko |
3780 |
u8 index; |
692 |
|
|
const struct ccs_profile *profile; |
693 |
kumaneko |
4049 |
next: |
694 |
kumaneko |
3780 |
index = head->r.index; |
695 |
|
|
profile = ccs_profile_ptr[index]; |
696 |
|
|
switch (head->r.step) { |
697 |
|
|
case 0: |
698 |
kumaneko |
3945 |
ccs_io_printf(head, "PROFILE_VERSION=%s\n", "20100903"); |
699 |
kumaneko |
3780 |
head->r.step++; |
700 |
|
|
break; |
701 |
|
|
case 1: |
702 |
|
|
for ( ; head->r.index < CCS_MAX_PROFILES; |
703 |
|
|
head->r.index++) |
704 |
|
|
if (ccs_profile_ptr[head->r.index]) |
705 |
|
|
break; |
706 |
|
|
if (head->r.index == CCS_MAX_PROFILES) |
707 |
|
|
return; |
708 |
|
|
head->r.step++; |
709 |
|
|
break; |
710 |
|
|
case 2: |
711 |
|
|
{ |
712 |
kumaneko |
4049 |
u8 i; |
713 |
kumaneko |
3780 |
const struct ccs_path_info *comment = profile->comment; |
714 |
|
|
ccs_io_printf(head, "%u-COMMENT=", index); |
715 |
|
|
ccs_set_string(head, comment ? comment->name : ""); |
716 |
|
|
ccs_set_lf(head); |
717 |
kumaneko |
4049 |
ccs_io_printf(head, "%u-PREFERENCE={ ", index); |
718 |
|
|
for (i = 0; i < CCS_MAX_PREF; i++) |
719 |
|
|
ccs_io_printf(head, "%s=%u ", |
720 |
|
|
ccs_pref_keywords[i], |
721 |
|
|
profile->pref[i]); |
722 |
|
|
ccs_set_string(head, " }\n"); |
723 |
kumaneko |
3780 |
head->r.step++; |
724 |
|
|
} |
725 |
|
|
break; |
726 |
|
|
case 3: |
727 |
|
|
{ |
728 |
|
|
ccs_io_printf(head, "%u-%s", index, "CONFIG"); |
729 |
|
|
ccs_print_config(head, profile->default_config); |
730 |
|
|
head->r.bit = 0; |
731 |
|
|
head->r.step++; |
732 |
|
|
} |
733 |
|
|
break; |
734 |
|
|
case 4: |
735 |
|
|
for ( ; head->r.bit < CCS_MAX_MAC_INDEX |
736 |
|
|
+ CCS_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { |
737 |
|
|
const u8 i = head->r.bit; |
738 |
|
|
const u8 config = profile->config[i]; |
739 |
kumaneko |
2958 |
if (config == CCS_CONFIG_USE_DEFAULT) |
740 |
|
|
continue; |
741 |
kumaneko |
3968 |
if (i < CCS_MAX_MAC_INDEX) |
742 |
|
|
ccs_io_printf(head, "%u-CONFIG::%s::%s", index, |
743 |
|
|
ccs_category_keywords |
744 |
|
|
[ccs_index2category[i]], |
745 |
|
|
ccs_mac_keywords[i]); |
746 |
|
|
else |
747 |
|
|
ccs_io_printf(head, "%u-CONFIG::%s", index, |
748 |
|
|
ccs_mac_keywords[i]); |
749 |
kumaneko |
3780 |
ccs_print_config(head, config); |
750 |
|
|
head->r.bit++; |
751 |
|
|
break; |
752 |
kumaneko |
2908 |
} |
753 |
kumaneko |
3780 |
if (head->r.bit == CCS_MAX_MAC_INDEX |
754 |
|
|
+ CCS_MAX_MAC_CATEGORY_INDEX) { |
755 |
|
|
head->r.index++; |
756 |
|
|
head->r.step = 1; |
757 |
|
|
} |
758 |
kumaneko |
2958 |
break; |
759 |
kumaneko |
2863 |
} |
760 |
kumaneko |
3780 |
if (ccs_flush(head)) |
761 |
|
|
goto next; |
762 |
kumaneko |
2863 |
} |
763 |
|
|
|
764 |
kumaneko |
4057 |
/** |
765 |
|
|
* ccs_same_manager - Check for duplicated "struct ccs_manager" entry. |
766 |
|
|
* |
767 |
|
|
* @a: Pointer to "struct ccs_acl_head". |
768 |
|
|
* @b: Pointer to "struct ccs_acl_head". |
769 |
|
|
* |
770 |
kumaneko |
4086 |
* Returns true if @a == @b, false otherwise. |
771 |
kumaneko |
4057 |
*/ |
772 |
kumaneko |
3781 |
static bool ccs_same_manager(const struct ccs_acl_head *a, |
773 |
|
|
const struct ccs_acl_head *b) |
774 |
kumaneko |
3689 |
{ |
775 |
kumaneko |
3693 |
return container_of(a, struct ccs_manager, head)->manager |
776 |
|
|
== container_of(b, struct ccs_manager, head)->manager; |
777 |
kumaneko |
3689 |
} |
778 |
kumaneko |
2863 |
|
779 |
|
|
/** |
780 |
|
|
* ccs_update_manager_entry - Add a manager entry. |
781 |
|
|
* |
782 |
|
|
* @manager: The path to manager or the domainnamme. |
783 |
|
|
* @is_delete: True if it is a delete request. |
784 |
|
|
* |
785 |
|
|
* Returns 0 on success, negative value otherwise. |
786 |
|
|
*/ |
787 |
|
|
static int ccs_update_manager_entry(const char *manager, const bool is_delete) |
788 |
|
|
{ |
789 |
kumaneko |
3693 |
struct ccs_manager e = { }; |
790 |
kumaneko |
2863 |
int error = is_delete ? -ENOENT : -ENOMEM; |
791 |
kumaneko |
3693 |
if (ccs_domain_def(manager)) { |
792 |
|
|
if (!ccs_correct_domain(manager)) |
793 |
kumaneko |
2863 |
return -EINVAL; |
794 |
kumaneko |
2900 |
e.is_domain = true; |
795 |
kumaneko |
2863 |
} else { |
796 |
kumaneko |
3707 |
if (!ccs_correct_path(manager)) |
797 |
kumaneko |
2863 |
return -EINVAL; |
798 |
|
|
} |
799 |
kumaneko |
2900 |
e.manager = ccs_get_name(manager); |
800 |
|
|
if (!e.manager) |
801 |
kumaneko |
3689 |
return error; |
802 |
|
|
error = ccs_update_policy(&e.head, sizeof(e), is_delete, |
803 |
kumaneko |
3754 |
&ccs_policy_list[CCS_ID_MANAGER], |
804 |
kumaneko |
3781 |
ccs_same_manager); |
805 |
kumaneko |
2900 |
ccs_put_name(e.manager); |
806 |
kumaneko |
2863 |
return error; |
807 |
|
|
} |
808 |
|
|
|
809 |
|
|
/** |
810 |
kumaneko |
3693 |
* ccs_write_manager - Write manager policy. |
811 |
kumaneko |
2863 |
* |
812 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
813 |
|
|
* |
814 |
|
|
* Returns 0 on success, negative value otherwise. |
815 |
|
|
*/ |
816 |
kumaneko |
3693 |
static int ccs_write_manager(struct ccs_io_buffer *head) |
817 |
kumaneko |
2863 |
{ |
818 |
|
|
char *data = head->write_buf; |
819 |
kumaneko |
3968 |
bool is_delete = ccs_str_starts(&data, "delete "); |
820 |
kumaneko |
2863 |
if (!strcmp(data, "manage_by_non_root")) { |
821 |
|
|
ccs_manage_by_non_root = !is_delete; |
822 |
|
|
return 0; |
823 |
|
|
} |
824 |
|
|
return ccs_update_manager_entry(data, is_delete); |
825 |
|
|
} |
826 |
|
|
|
827 |
|
|
/** |
828 |
kumaneko |
3693 |
* ccs_read_manager - Read manager policy. |
829 |
kumaneko |
2863 |
* |
830 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
831 |
|
|
* |
832 |
kumaneko |
4084 |
* Returns nothing. |
833 |
|
|
* |
834 |
kumaneko |
2863 |
* Caller holds ccs_read_lock(). |
835 |
|
|
*/ |
836 |
kumaneko |
3693 |
static void ccs_read_manager(struct ccs_io_buffer *head) |
837 |
kumaneko |
2863 |
{ |
838 |
kumaneko |
3780 |
if (head->r.eof) |
839 |
kumaneko |
2943 |
return; |
840 |
kumaneko |
3780 |
list_for_each_cookie(head->r.acl, &ccs_policy_list[CCS_ID_MANAGER]) { |
841 |
|
|
struct ccs_manager *ptr = |
842 |
|
|
list_entry(head->r.acl, typeof(*ptr), head.list); |
843 |
kumaneko |
3689 |
if (ptr->head.is_deleted) |
844 |
kumaneko |
2863 |
continue; |
845 |
kumaneko |
3780 |
if (!ccs_flush(head)) |
846 |
kumaneko |
2943 |
return; |
847 |
kumaneko |
3780 |
ccs_set_string(head, ptr->manager->name); |
848 |
|
|
ccs_set_lf(head); |
849 |
kumaneko |
2863 |
} |
850 |
kumaneko |
3780 |
head->r.eof = true; |
851 |
kumaneko |
2863 |
} |
852 |
|
|
|
853 |
|
|
/** |
854 |
kumaneko |
3693 |
* ccs_manager - Check whether the current process is a policy manager. |
855 |
kumaneko |
2863 |
* |
856 |
|
|
* Returns true if the current process is permitted to modify policy |
857 |
|
|
* via /proc/ccs/ interface. |
858 |
|
|
* |
859 |
|
|
* Caller holds ccs_read_lock(). |
860 |
|
|
*/ |
861 |
kumaneko |
3693 |
static bool ccs_manager(void) |
862 |
kumaneko |
2863 |
{ |
863 |
kumaneko |
3693 |
struct ccs_manager *ptr; |
864 |
kumaneko |
2863 |
const char *exe; |
865 |
kumaneko |
4049 |
struct ccs_security *task = ccs_current_security(); |
866 |
kumaneko |
2863 |
const struct ccs_path_info *domainname |
867 |
|
|
= ccs_current_domain()->domainname; |
868 |
|
|
bool found = false; |
869 |
|
|
if (!ccs_policy_loaded) |
870 |
|
|
return true; |
871 |
kumaneko |
3693 |
if (task->ccs_flags & CCS_TASK_IS_MANAGER) |
872 |
kumaneko |
2863 |
return true; |
873 |
|
|
if (!ccs_manage_by_non_root && (current_uid() || current_euid())) |
874 |
|
|
return false; |
875 |
|
|
exe = ccs_get_exe(); |
876 |
kumaneko |
4049 |
list_for_each_entry_srcu(ptr, &ccs_policy_list[CCS_ID_MANAGER], |
877 |
|
|
head.list, &ccs_ss) { |
878 |
kumaneko |
3697 |
if (ptr->head.is_deleted) |
879 |
|
|
continue; |
880 |
|
|
if (ptr->is_domain) { |
881 |
|
|
if (ccs_pathcmp(domainname, ptr->manager)) |
882 |
|
|
continue; |
883 |
|
|
} else { |
884 |
|
|
if (!exe || strcmp(exe, ptr->manager->name)) |
885 |
|
|
continue; |
886 |
kumaneko |
2863 |
} |
887 |
kumaneko |
3697 |
/* Set manager flag. */ |
888 |
|
|
task->ccs_flags |= CCS_TASK_IS_MANAGER; |
889 |
|
|
found = true; |
890 |
|
|
break; |
891 |
kumaneko |
2863 |
} |
892 |
|
|
if (!found) { /* Reduce error messages. */ |
893 |
|
|
static pid_t ccs_last_pid; |
894 |
|
|
const pid_t pid = current->pid; |
895 |
|
|
if (ccs_last_pid != pid) { |
896 |
|
|
printk(KERN_WARNING "%s ( %s ) is not permitted to " |
897 |
|
|
"update policies.\n", domainname->name, exe); |
898 |
|
|
ccs_last_pid = pid; |
899 |
|
|
} |
900 |
|
|
} |
901 |
|
|
kfree(exe); |
902 |
|
|
return found; |
903 |
|
|
} |
904 |
|
|
|
905 |
|
|
/** |
906 |
kumaneko |
3693 |
* ccs_select_one - Parse select command. |
907 |
kumaneko |
2863 |
* |
908 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
909 |
|
|
* @data: String to parse. |
910 |
|
|
* |
911 |
|
|
* Returns true on success, false otherwise. |
912 |
|
|
* |
913 |
|
|
* Caller holds ccs_read_lock(). |
914 |
|
|
*/ |
915 |
kumaneko |
3693 |
static bool ccs_select_one(struct ccs_io_buffer *head, const char *data) |
916 |
kumaneko |
2863 |
{ |
917 |
|
|
unsigned int pid; |
918 |
|
|
struct ccs_domain_info *domain = NULL; |
919 |
kumaneko |
2970 |
bool global_pid = false; |
920 |
kumaneko |
3808 |
if (!strcmp(data, "execute")) { |
921 |
kumaneko |
3780 |
head->r.print_execute_only = true; |
922 |
kumaneko |
2863 |
return true; |
923 |
|
|
} |
924 |
kumaneko |
2970 |
if (sscanf(data, "pid=%u", &pid) == 1 || |
925 |
|
|
(global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { |
926 |
kumaneko |
2863 |
struct task_struct *p; |
927 |
kumaneko |
3248 |
ccs_tasklist_lock(); |
928 |
kumaneko |
2970 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
929 |
|
|
if (global_pid) |
930 |
kumaneko |
3502 |
p = ccsecurity_exports.find_task_by_pid_ns(pid, |
931 |
|
|
&init_pid_ns); |
932 |
kumaneko |
2970 |
else |
933 |
kumaneko |
3502 |
p = ccsecurity_exports.find_task_by_vpid(pid); |
934 |
kumaneko |
2970 |
#else |
935 |
kumaneko |
2863 |
p = find_task_by_pid(pid); |
936 |
kumaneko |
2970 |
#endif |
937 |
kumaneko |
2863 |
if (p) |
938 |
|
|
domain = ccs_task_domain(p); |
939 |
kumaneko |
3248 |
ccs_tasklist_unlock(); |
940 |
kumaneko |
2863 |
} else if (!strncmp(data, "domain=", 7)) { |
941 |
kumaneko |
3693 |
if (ccs_domain_def(data + 7)) |
942 |
kumaneko |
2863 |
domain = ccs_find_domain(data + 7); |
943 |
|
|
} else |
944 |
|
|
return false; |
945 |
kumaneko |
3780 |
head->w.domain = domain; |
946 |
kumaneko |
2863 |
/* Accessing read_buf is safe because head->io_sem is held. */ |
947 |
|
|
if (!head->read_buf) |
948 |
|
|
return true; /* Do nothing if open(O_WRONLY). */ |
949 |
kumaneko |
3780 |
memset(&head->r, 0, sizeof(head->r)); |
950 |
|
|
head->r.print_this_domain_only = true; |
951 |
kumaneko |
3892 |
if (domain) |
952 |
|
|
head->r.domain = &domain->list; |
953 |
|
|
else |
954 |
|
|
head->r.eof = true; |
955 |
kumaneko |
2863 |
ccs_io_printf(head, "# select %s\n", data); |
956 |
kumaneko |
3772 |
if (domain && domain->is_deleted) |
957 |
kumaneko |
3780 |
ccs_set_string(head, "# This is a deleted domain.\n"); |
958 |
kumaneko |
2863 |
return true; |
959 |
|
|
} |
960 |
|
|
|
961 |
kumaneko |
4057 |
/** |
962 |
|
|
* ccs_same_handler_acl - Check for duplicated "struct ccs_handler_acl" entry. |
963 |
|
|
* |
964 |
|
|
* @a: Pointer to "struct ccs_acl_info". |
965 |
|
|
* @b: Pointer to "struct ccs_acl_info". |
966 |
|
|
* |
967 |
kumaneko |
4086 |
* Returns true if @a == @b, false otherwise. |
968 |
kumaneko |
4057 |
*/ |
969 |
kumaneko |
3924 |
static bool ccs_same_handler_acl(const struct ccs_acl_info *a, |
970 |
|
|
const struct ccs_acl_info *b) |
971 |
|
|
{ |
972 |
|
|
const struct ccs_handler_acl *p1 = container_of(a, typeof(*p1), head); |
973 |
|
|
const struct ccs_handler_acl *p2 = container_of(b, typeof(*p2), head); |
974 |
kumaneko |
3949 |
return p1->handler == p2->handler; |
975 |
kumaneko |
3924 |
} |
976 |
|
|
|
977 |
kumaneko |
4057 |
/** |
978 |
|
|
* ccs_same_task_acl - Check for duplicated "struct ccs_task_acl" entry. |
979 |
|
|
* |
980 |
|
|
* @a: Pointer to "struct ccs_acl_info". |
981 |
|
|
* @b: Pointer to "struct ccs_acl_info". |
982 |
|
|
* |
983 |
kumaneko |
4086 |
* Returns true if @a == @b, false otherwise. |
984 |
kumaneko |
4057 |
*/ |
985 |
kumaneko |
3924 |
static bool ccs_same_task_acl(const struct ccs_acl_info *a, |
986 |
|
|
const struct ccs_acl_info *b) |
987 |
|
|
{ |
988 |
|
|
const struct ccs_task_acl *p1 = container_of(a, typeof(*p1), head); |
989 |
|
|
const struct ccs_task_acl *p2 = container_of(b, typeof(*p2), head); |
990 |
kumaneko |
3949 |
return p1->domainname == p2->domainname; |
991 |
kumaneko |
3924 |
} |
992 |
|
|
|
993 |
|
|
/** |
994 |
|
|
* ccs_write_task - Update task related list. |
995 |
|
|
* |
996 |
kumaneko |
3949 |
* @param: Pointer to "struct ccs_acl_param". |
997 |
kumaneko |
3924 |
* |
998 |
|
|
* Returns 0 on success, negative value otherwise. |
999 |
|
|
*/ |
1000 |
kumaneko |
3952 |
static int ccs_write_task(struct ccs_acl_param *param) |
1001 |
kumaneko |
3924 |
{ |
1002 |
|
|
int error; |
1003 |
kumaneko |
3952 |
const bool is_auto = ccs_str_starts(¶m->data, |
1004 |
|
|
"auto_domain_transition "); |
1005 |
|
|
if (!is_auto && !ccs_str_starts(¶m->data, |
1006 |
|
|
"manual_domain_transition ")) { |
1007 |
kumaneko |
3949 |
struct ccs_handler_acl e = { }; |
1008 |
kumaneko |
3952 |
char *handler; |
1009 |
|
|
if (ccs_str_starts(¶m->data, "auto_execute_handler ")) |
1010 |
kumaneko |
3924 |
e.head.type = CCS_TYPE_AUTO_EXECUTE_HANDLER; |
1011 |
kumaneko |
3952 |
else if (ccs_str_starts(¶m->data, |
1012 |
|
|
"denied_execute_handler ")) |
1013 |
kumaneko |
3924 |
e.head.type = CCS_TYPE_DENIED_EXECUTE_HANDLER; |
1014 |
|
|
else |
1015 |
|
|
return -EINVAL; |
1016 |
kumaneko |
3952 |
handler = ccs_read_token(param); |
1017 |
|
|
if (!ccs_correct_path(handler)) |
1018 |
kumaneko |
3924 |
return -EINVAL; |
1019 |
kumaneko |
3952 |
e.handler = ccs_get_name(handler); |
1020 |
kumaneko |
3924 |
if (!e.handler) |
1021 |
|
|
return -ENOMEM; |
1022 |
|
|
if (e.handler->is_patterned) |
1023 |
|
|
error = -EINVAL; /* No patterns allowed. */ |
1024 |
|
|
else |
1025 |
kumaneko |
3949 |
error = ccs_update_domain(&e.head, sizeof(e), param, |
1026 |
kumaneko |
3924 |
ccs_same_handler_acl, NULL); |
1027 |
|
|
ccs_put_name(e.handler); |
1028 |
|
|
} else { |
1029 |
|
|
struct ccs_task_acl e = { |
1030 |
|
|
.head.type = is_auto ? |
1031 |
kumaneko |
3952 |
CCS_TYPE_AUTO_TASK_ACL : CCS_TYPE_MANUAL_TASK_ACL, |
1032 |
|
|
.domainname = ccs_get_domainname(param), |
1033 |
kumaneko |
3924 |
}; |
1034 |
|
|
if (!e.domainname) |
1035 |
kumaneko |
3952 |
error = -EINVAL; |
1036 |
|
|
else |
1037 |
|
|
error = ccs_update_domain(&e.head, sizeof(e), param, |
1038 |
|
|
ccs_same_task_acl, NULL); |
1039 |
kumaneko |
3924 |
ccs_put_name(e.domainname); |
1040 |
|
|
} |
1041 |
|
|
return error; |
1042 |
|
|
} |
1043 |
|
|
|
1044 |
kumaneko |
4063 |
/** |
1045 |
|
|
* ccs_write_domain2 - Write domain policy. |
1046 |
|
|
* |
1047 |
|
|
* @data: Policy to be interpreted. |
1048 |
|
|
* @domain: Pointer to "struct ccs_domain_info". |
1049 |
|
|
* @is_delete: True if it is a delete request. |
1050 |
|
|
* |
1051 |
|
|
* Returns 0 on success, negative value otherwise. |
1052 |
|
|
*/ |
1053 |
kumaneko |
3693 |
static int ccs_write_domain2(char *data, struct ccs_domain_info *domain, |
1054 |
kumaneko |
3746 |
const bool is_delete) |
1055 |
kumaneko |
2897 |
{ |
1056 |
kumaneko |
3949 |
struct ccs_acl_param param = { |
1057 |
kumaneko |
3952 |
.data = data, |
1058 |
kumaneko |
3949 |
.domain = domain, |
1059 |
|
|
.is_delete = is_delete, |
1060 |
|
|
}; |
1061 |
kumaneko |
3692 |
static const struct { |
1062 |
|
|
const char *keyword; |
1063 |
kumaneko |
3952 |
int (*write) (struct ccs_acl_param *); |
1064 |
kumaneko |
3924 |
} ccs_callback[7] = { |
1065 |
|
|
{ "file ", ccs_write_file }, |
1066 |
kumaneko |
3911 |
{ "network inet ", ccs_write_inet_network }, |
1067 |
|
|
{ "network unix ", ccs_write_unix_network }, |
1068 |
kumaneko |
3808 |
{ "misc ", ccs_write_misc }, |
1069 |
|
|
{ "capability ", ccs_write_capability }, |
1070 |
|
|
{ "ipc ", ccs_write_ipc }, |
1071 |
kumaneko |
3924 |
{ "task ", ccs_write_task }, |
1072 |
kumaneko |
3692 |
}; |
1073 |
kumaneko |
3746 |
u8 i; |
1074 |
kumaneko |
3924 |
for (i = 0; i < 7; i++) { |
1075 |
kumaneko |
3952 |
if (!ccs_str_starts(¶m.data, ccs_callback[i].keyword)) |
1076 |
kumaneko |
3692 |
continue; |
1077 |
kumaneko |
3952 |
return ccs_callback[i].write(¶m); |
1078 |
kumaneko |
3692 |
} |
1079 |
kumaneko |
3952 |
return -EINVAL; |
1080 |
kumaneko |
2897 |
} |
1081 |
|
|
|
1082 |
kumaneko |
4063 |
/* String table for domain flags. */ |
1083 |
kumaneko |
3968 |
const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS] = { |
1084 |
|
|
[CCS_DIF_QUOTA_WARNED] = "quota_exceeded\n", |
1085 |
|
|
[CCS_DIF_TRANSITION_FAILED] = "transition_failed\n", |
1086 |
kumaneko |
3747 |
}; |
1087 |
kumaneko |
3968 |
|
1088 |
kumaneko |
2863 |
/** |
1089 |
kumaneko |
3693 |
* ccs_write_domain - Write domain policy. |
1090 |
kumaneko |
2863 |
* |
1091 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1092 |
|
|
* |
1093 |
|
|
* Returns 0 on success, negative value otherwise. |
1094 |
|
|
*/ |
1095 |
kumaneko |
3693 |
static int ccs_write_domain(struct ccs_io_buffer *head) |
1096 |
kumaneko |
2863 |
{ |
1097 |
|
|
char *data = head->write_buf; |
1098 |
kumaneko |
3780 |
struct ccs_domain_info *domain = head->w.domain; |
1099 |
kumaneko |
2863 |
bool is_delete = false; |
1100 |
|
|
bool is_select = false; |
1101 |
|
|
unsigned int profile; |
1102 |
kumaneko |
3968 |
if (ccs_str_starts(&data, "delete ")) |
1103 |
kumaneko |
2863 |
is_delete = true; |
1104 |
kumaneko |
3968 |
else if (ccs_str_starts(&data, "select ")) |
1105 |
kumaneko |
2863 |
is_select = true; |
1106 |
kumaneko |
3693 |
if (is_select && ccs_select_one(head, data)) |
1107 |
kumaneko |
2863 |
return 0; |
1108 |
|
|
/* Don't allow updating policies by non manager programs. */ |
1109 |
kumaneko |
3693 |
if (!ccs_manager()) |
1110 |
kumaneko |
2863 |
return -EPERM; |
1111 |
kumaneko |
3693 |
if (ccs_domain_def(data)) { |
1112 |
kumaneko |
2863 |
domain = NULL; |
1113 |
|
|
if (is_delete) |
1114 |
|
|
ccs_delete_domain(data); |
1115 |
|
|
else if (is_select) |
1116 |
|
|
domain = ccs_find_domain(data); |
1117 |
|
|
else |
1118 |
kumaneko |
3905 |
domain = ccs_assign_domain(data, 0, 0, false); |
1119 |
kumaneko |
3780 |
head->w.domain = domain; |
1120 |
kumaneko |
2863 |
return 0; |
1121 |
|
|
} |
1122 |
|
|
if (!domain) |
1123 |
|
|
return -EINVAL; |
1124 |
|
|
|
1125 |
kumaneko |
3968 |
if (sscanf(data, "use_profile %u\n", &profile) == 1 |
1126 |
kumaneko |
2892 |
&& profile < CCS_MAX_PROFILES) { |
1127 |
kumaneko |
2991 |
if (!ccs_policy_loaded || ccs_profile_ptr[(u8) profile]) |
1128 |
kumaneko |
4181 |
if (!is_delete) |
1129 |
|
|
domain->profile = (u8) profile; |
1130 |
kumaneko |
2863 |
return 0; |
1131 |
|
|
} |
1132 |
kumaneko |
3968 |
if (sscanf(data, "use_group %u\n", &profile) == 1 |
1133 |
kumaneko |
3821 |
&& profile < CCS_MAX_ACL_GROUPS) { |
1134 |
kumaneko |
4181 |
if (!is_delete) |
1135 |
|
|
domain->group = (u8) profile; |
1136 |
kumaneko |
3821 |
return 0; |
1137 |
|
|
} |
1138 |
kumaneko |
3747 |
for (profile = 0; profile < CCS_MAX_DOMAIN_INFO_FLAGS; profile++) { |
1139 |
|
|
const char *cp = ccs_dif[profile]; |
1140 |
|
|
if (strncmp(data, cp, strlen(cp) - 1)) |
1141 |
|
|
continue; |
1142 |
|
|
domain->flags[profile] = !is_delete; |
1143 |
kumaneko |
3702 |
return 0; |
1144 |
|
|
} |
1145 |
kumaneko |
3746 |
return ccs_write_domain2(data, domain, is_delete); |
1146 |
kumaneko |
2863 |
} |
1147 |
|
|
|
1148 |
kumaneko |
2948 |
/** |
1149 |
|
|
* ccs_print_name_union - Print a ccs_name_union. |
1150 |
|
|
* |
1151 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1152 |
|
|
* @ptr: Pointer to "struct ccs_name_union". |
1153 |
kumaneko |
4063 |
* |
1154 |
|
|
* Returns nothing. |
1155 |
kumaneko |
2948 |
*/ |
1156 |
kumaneko |
3780 |
static void ccs_print_name_union(struct ccs_io_buffer *head, |
1157 |
kumaneko |
2894 |
const struct ccs_name_union *ptr) |
1158 |
kumaneko |
2863 |
{ |
1159 |
kumaneko |
3780 |
const bool cond = head->r.print_cond_part; |
1160 |
|
|
if (!cond) |
1161 |
|
|
ccs_set_space(head); |
1162 |
|
|
if (ptr->is_group) { |
1163 |
|
|
ccs_set_string(head, "@"); |
1164 |
|
|
ccs_set_string(head, ptr->group->group_name->name); |
1165 |
|
|
} else { |
1166 |
|
|
if (cond) |
1167 |
|
|
ccs_set_string(head, "\""); |
1168 |
|
|
ccs_set_string(head, ptr->filename->name); |
1169 |
|
|
if (cond) |
1170 |
|
|
ccs_set_string(head, "\""); |
1171 |
|
|
} |
1172 |
kumaneko |
2863 |
} |
1173 |
|
|
|
1174 |
kumaneko |
2948 |
/** |
1175 |
kumaneko |
3780 |
* ccs_print_number_union - Print a ccs_number_union. |
1176 |
kumaneko |
2948 |
* |
1177 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1178 |
kumaneko |
3780 |
* @ptr: Pointer to "struct ccs_number_union". |
1179 |
kumaneko |
4063 |
* |
1180 |
|
|
* Returns nothing. |
1181 |
kumaneko |
2948 |
*/ |
1182 |
kumaneko |
3780 |
static void ccs_print_number_union(struct ccs_io_buffer *head, |
1183 |
|
|
const struct ccs_number_union *ptr) |
1184 |
kumaneko |
2863 |
{ |
1185 |
kumaneko |
3780 |
if (!head->r.print_cond_part) |
1186 |
|
|
ccs_set_space(head); |
1187 |
|
|
if (ptr->is_group) { |
1188 |
|
|
ccs_set_string(head, "@"); |
1189 |
|
|
ccs_set_string(head, ptr->group->group_name->name); |
1190 |
|
|
} else { |
1191 |
|
|
int i; |
1192 |
|
|
unsigned long min = ptr->values[0]; |
1193 |
|
|
const unsigned long max = ptr->values[1]; |
1194 |
|
|
u8 min_type = ptr->value_type[0]; |
1195 |
|
|
const u8 max_type = ptr->value_type[1]; |
1196 |
|
|
char buffer[128]; |
1197 |
|
|
buffer[0] = '\0'; |
1198 |
|
|
for (i = 0; i < 2; i++) { |
1199 |
|
|
switch (min_type) { |
1200 |
|
|
case CCS_VALUE_TYPE_HEXADECIMAL: |
1201 |
|
|
ccs_addprintf(buffer, sizeof(buffer), "0x%lX", |
1202 |
|
|
min); |
1203 |
|
|
break; |
1204 |
|
|
case CCS_VALUE_TYPE_OCTAL: |
1205 |
|
|
ccs_addprintf(buffer, sizeof(buffer), "0%lo", |
1206 |
|
|
min); |
1207 |
|
|
break; |
1208 |
|
|
default: |
1209 |
|
|
ccs_addprintf(buffer, sizeof(buffer), "%lu", |
1210 |
|
|
min); |
1211 |
|
|
break; |
1212 |
|
|
} |
1213 |
|
|
if (min == max && min_type == max_type) |
1214 |
|
|
break; |
1215 |
|
|
ccs_addprintf(buffer, sizeof(buffer), "-"); |
1216 |
|
|
min_type = max_type; |
1217 |
|
|
min = max; |
1218 |
kumaneko |
3690 |
} |
1219 |
kumaneko |
3780 |
ccs_io_printf(head, "%s", buffer); |
1220 |
kumaneko |
3690 |
} |
1221 |
|
|
} |
1222 |
|
|
|
1223 |
kumaneko |
2948 |
/** |
1224 |
kumaneko |
2894 |
* ccs_print_condition - Print condition part. |
1225 |
|
|
* |
1226 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1227 |
kumaneko |
3780 |
* @cond: Pointer to "struct ccs_condition". |
1228 |
kumaneko |
2894 |
* |
1229 |
|
|
* Returns true on success, false otherwise. |
1230 |
|
|
*/ |
1231 |
|
|
static bool ccs_print_condition(struct ccs_io_buffer *head, |
1232 |
|
|
const struct ccs_condition *cond) |
1233 |
|
|
{ |
1234 |
kumaneko |
3780 |
switch (head->r.cond_step) { |
1235 |
|
|
case 0: |
1236 |
kumaneko |
3952 |
head->r.cond_index = 0; |
1237 |
|
|
head->r.cond_step++; |
1238 |
kumaneko |
3780 |
/* fall through */ |
1239 |
|
|
case 1: |
1240 |
|
|
{ |
1241 |
|
|
const u16 condc = cond->condc; |
1242 |
|
|
const struct ccs_condition_element *condp = |
1243 |
|
|
(typeof(condp)) (cond + 1); |
1244 |
|
|
const struct ccs_number_union *numbers_p = |
1245 |
|
|
(typeof(numbers_p)) (condp + condc); |
1246 |
|
|
const struct ccs_name_union *names_p = |
1247 |
|
|
(typeof(names_p)) |
1248 |
|
|
(numbers_p + cond->numbers_count); |
1249 |
|
|
const struct ccs_argv *argv = |
1250 |
|
|
(typeof(argv)) (names_p + cond->names_count); |
1251 |
|
|
const struct ccs_envp *envp = |
1252 |
|
|
(typeof(envp)) (argv + cond->argc); |
1253 |
|
|
u16 skip; |
1254 |
|
|
for (skip = 0; skip < head->r.cond_index; skip++) { |
1255 |
|
|
const u8 left = condp->left; |
1256 |
|
|
const u8 right = condp->right; |
1257 |
|
|
condp++; |
1258 |
|
|
switch (left) { |
1259 |
|
|
case CCS_ARGV_ENTRY: |
1260 |
|
|
argv++; |
1261 |
|
|
continue; |
1262 |
|
|
case CCS_ENVP_ENTRY: |
1263 |
|
|
envp++; |
1264 |
|
|
continue; |
1265 |
|
|
case CCS_NUMBER_UNION: |
1266 |
|
|
numbers_p++; |
1267 |
|
|
break; |
1268 |
|
|
} |
1269 |
|
|
switch (right) { |
1270 |
|
|
case CCS_NAME_UNION: |
1271 |
|
|
names_p++; |
1272 |
|
|
break; |
1273 |
|
|
case CCS_NUMBER_UNION: |
1274 |
|
|
numbers_p++; |
1275 |
|
|
break; |
1276 |
|
|
} |
1277 |
kumaneko |
2894 |
} |
1278 |
kumaneko |
3780 |
while (head->r.cond_index < condc) { |
1279 |
|
|
const u8 match = condp->equals; |
1280 |
|
|
const u8 left = condp->left; |
1281 |
|
|
const u8 right = condp->right; |
1282 |
|
|
if (!ccs_flush(head)) |
1283 |
|
|
return false; |
1284 |
|
|
condp++; |
1285 |
|
|
head->r.cond_index++; |
1286 |
|
|
ccs_set_space(head); |
1287 |
|
|
switch (left) { |
1288 |
|
|
case CCS_ARGV_ENTRY: |
1289 |
|
|
ccs_io_printf(head, |
1290 |
|
|
"exec.argv[%u]%s\"%s\"", |
1291 |
|
|
argv->index, |
1292 |
|
|
argv->is_not ? |
1293 |
|
|
"!=" : "=", |
1294 |
|
|
argv->value->name); |
1295 |
|
|
argv++; |
1296 |
|
|
continue; |
1297 |
|
|
case CCS_ENVP_ENTRY: |
1298 |
|
|
ccs_io_printf(head, |
1299 |
|
|
"exec.envp[\"%s\"]%s", |
1300 |
|
|
envp->name->name, |
1301 |
|
|
envp->is_not ? |
1302 |
|
|
"!=" : "="); |
1303 |
|
|
if (envp->value) { |
1304 |
|
|
ccs_set_string(head, "\""); |
1305 |
|
|
ccs_set_string(head, envp-> |
1306 |
|
|
value->name); |
1307 |
|
|
ccs_set_string(head, "\""); |
1308 |
|
|
} else { |
1309 |
|
|
ccs_set_string(head, "NULL"); |
1310 |
|
|
} |
1311 |
|
|
envp++; |
1312 |
|
|
continue; |
1313 |
|
|
case CCS_NUMBER_UNION: |
1314 |
|
|
ccs_print_number_union(head, |
1315 |
|
|
numbers_p++); |
1316 |
|
|
break; |
1317 |
|
|
default: |
1318 |
|
|
ccs_set_string(head, |
1319 |
|
|
ccs_condition_keyword[left]); |
1320 |
|
|
break; |
1321 |
|
|
} |
1322 |
|
|
ccs_set_string(head, match ? "=" : "!="); |
1323 |
|
|
switch (right) { |
1324 |
|
|
case CCS_NAME_UNION: |
1325 |
|
|
ccs_print_name_union(head, names_p++); |
1326 |
|
|
break; |
1327 |
|
|
case CCS_NUMBER_UNION: |
1328 |
|
|
ccs_print_number_union(head, |
1329 |
|
|
numbers_p++); |
1330 |
|
|
break; |
1331 |
|
|
default: |
1332 |
|
|
ccs_set_string(head, |
1333 |
|
|
ccs_condition_keyword[right]); |
1334 |
|
|
break; |
1335 |
|
|
} |
1336 |
|
|
} |
1337 |
kumaneko |
2894 |
} |
1338 |
kumaneko |
3780 |
head->r.cond_step++; |
1339 |
|
|
/* fall through */ |
1340 |
|
|
case 2: |
1341 |
|
|
if (!ccs_flush(head)) |
1342 |
kumaneko |
2894 |
break; |
1343 |
kumaneko |
3780 |
head->r.cond_step++; |
1344 |
|
|
/* fall through */ |
1345 |
|
|
case 3: |
1346 |
kumaneko |
4057 |
if (cond->grant_log != CCS_GRANTLOG_AUTO) |
1347 |
kumaneko |
3963 |
ccs_io_printf(head, " grant_log=%s", |
1348 |
kumaneko |
4057 |
ccs_yesno(cond->grant_log == |
1349 |
|
|
CCS_GRANTLOG_YES)); |
1350 |
kumaneko |
3924 |
if (cond->transit) { |
1351 |
kumaneko |
4118 |
ccs_set_string(head, " auto_domain_transition=\""); |
1352 |
kumaneko |
3924 |
ccs_set_string(head, cond->transit->name); |
1353 |
|
|
ccs_set_string(head, "\""); |
1354 |
kumaneko |
2894 |
} |
1355 |
kumaneko |
3780 |
ccs_set_lf(head); |
1356 |
|
|
return true; |
1357 |
kumaneko |
2894 |
} |
1358 |
|
|
return false; |
1359 |
|
|
} |
1360 |
|
|
|
1361 |
kumaneko |
3872 |
/** |
1362 |
|
|
* ccs_fns - Find next set bit. |
1363 |
|
|
* |
1364 |
|
|
* @perm: 8 bits value. |
1365 |
|
|
* @bit: First bit to find. |
1366 |
|
|
* |
1367 |
|
|
* Returns next set bit on success, 8 otherwise. |
1368 |
|
|
*/ |
1369 |
|
|
static u8 ccs_fns(const u8 perm, u8 bit) |
1370 |
|
|
{ |
1371 |
|
|
for ( ; bit < 8; bit++) |
1372 |
|
|
if (perm & (1 << bit)) |
1373 |
|
|
break; |
1374 |
|
|
return bit; |
1375 |
|
|
} |
1376 |
|
|
|
1377 |
kumaneko |
4063 |
/** |
1378 |
|
|
* ccs_set_group - Print "acl_group " header keyword. |
1379 |
|
|
* |
1380 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1381 |
|
|
* |
1382 |
|
|
* Returns nothing. |
1383 |
|
|
*/ |
1384 |
kumaneko |
3821 |
static void ccs_set_group(struct ccs_io_buffer *head) |
1385 |
|
|
{ |
1386 |
|
|
if (head->type == CCS_EXCEPTIONPOLICY) |
1387 |
|
|
ccs_io_printf(head, "acl_group %u ", head->r.group_index); |
1388 |
|
|
} |
1389 |
|
|
|
1390 |
kumaneko |
3780 |
/** |
1391 |
kumaneko |
3772 |
* ccs_print_entry - Print an ACL entry. |
1392 |
kumaneko |
2863 |
* |
1393 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1394 |
kumaneko |
3780 |
* @acl: Pointer to an ACL entry. |
1395 |
kumaneko |
2863 |
* |
1396 |
|
|
* Returns true on success, false otherwise. |
1397 |
|
|
*/ |
1398 |
kumaneko |
3772 |
static bool ccs_print_entry(struct ccs_io_buffer *head, |
1399 |
|
|
const struct ccs_acl_info *acl) |
1400 |
kumaneko |
2863 |
{ |
1401 |
kumaneko |
3772 |
const u8 acl_type = acl->type; |
1402 |
kumaneko |
3872 |
u8 bit; |
1403 |
kumaneko |
3780 |
if (head->r.print_cond_part) |
1404 |
|
|
goto print_cond_part; |
1405 |
kumaneko |
3772 |
if (acl->is_deleted) |
1406 |
|
|
return true; |
1407 |
kumaneko |
4049 |
next: |
1408 |
kumaneko |
3872 |
bit = head->r.bit; |
1409 |
kumaneko |
3780 |
if (!ccs_flush(head)) |
1410 |
|
|
return false; |
1411 |
|
|
else if (acl_type == CCS_TYPE_PATH_ACL) { |
1412 |
kumaneko |
3772 |
struct ccs_path_acl *ptr |
1413 |
|
|
= container_of(acl, typeof(*ptr), head); |
1414 |
kumaneko |
3872 |
const u16 perm = ptr->perm; |
1415 |
|
|
for ( ; bit < CCS_MAX_PATH_OPERATION; bit++) { |
1416 |
|
|
if (!(perm & (1 << bit))) |
1417 |
|
|
continue; |
1418 |
|
|
if (head->r.print_execute_only && |
1419 |
kumaneko |
3924 |
bit != CCS_TYPE_EXECUTE |
1420 |
|
|
/* && bit != CCS_TYPE_TRANSIT */) |
1421 |
kumaneko |
3872 |
continue; |
1422 |
|
|
break; |
1423 |
|
|
} |
1424 |
|
|
if (bit >= CCS_MAX_PATH_OPERATION) |
1425 |
kumaneko |
3772 |
goto done; |
1426 |
kumaneko |
3872 |
ccs_set_group(head); |
1427 |
|
|
ccs_set_string(head, "file "); |
1428 |
|
|
ccs_set_string(head, ccs_path_keyword[bit]); |
1429 |
kumaneko |
3780 |
ccs_print_name_union(head, &ptr->name); |
1430 |
kumaneko |
3924 |
} else if (acl_type == CCS_TYPE_AUTO_EXECUTE_HANDLER || |
1431 |
kumaneko |
3772 |
acl_type == CCS_TYPE_DENIED_EXECUTE_HANDLER) { |
1432 |
kumaneko |
3924 |
struct ccs_handler_acl *ptr |
1433 |
kumaneko |
3772 |
= container_of(acl, typeof(*ptr), head); |
1434 |
kumaneko |
3821 |
ccs_set_group(head); |
1435 |
kumaneko |
3924 |
ccs_set_string(head, "task "); |
1436 |
|
|
ccs_set_string(head, acl_type == CCS_TYPE_AUTO_EXECUTE_HANDLER |
1437 |
|
|
? "auto_execute_handler " : |
1438 |
|
|
"denied_execute_handler "); |
1439 |
kumaneko |
3780 |
ccs_set_string(head, ptr->handler->name); |
1440 |
kumaneko |
3924 |
} else if (acl_type == CCS_TYPE_AUTO_TASK_ACL || |
1441 |
|
|
acl_type == CCS_TYPE_MANUAL_TASK_ACL) { |
1442 |
|
|
struct ccs_task_acl *ptr = |
1443 |
|
|
container_of(acl, typeof(*ptr), head); |
1444 |
|
|
ccs_set_group(head); |
1445 |
|
|
ccs_set_string(head, "task "); |
1446 |
|
|
ccs_set_string(head, acl_type == CCS_TYPE_AUTO_TASK_ACL ? |
1447 |
|
|
"auto_domain_transition " : |
1448 |
|
|
"manual_domain_transition "); |
1449 |
|
|
ccs_set_string(head, ptr->domainname->name); |
1450 |
kumaneko |
3780 |
} else if (head->r.print_execute_only) { |
1451 |
kumaneko |
3772 |
return true; |
1452 |
|
|
} else if (acl_type == CCS_TYPE_MKDEV_ACL) { |
1453 |
kumaneko |
3780 |
struct ccs_mkdev_acl *ptr = |
1454 |
|
|
container_of(acl, typeof(*ptr), head); |
1455 |
kumaneko |
3872 |
bit = ccs_fns(ptr->perm, bit); |
1456 |
|
|
if (bit >= CCS_MAX_MKDEV_OPERATION) |
1457 |
kumaneko |
3772 |
goto done; |
1458 |
kumaneko |
3872 |
ccs_set_group(head); |
1459 |
|
|
ccs_set_string(head, "file "); |
1460 |
kumaneko |
3968 |
ccs_set_string(head, ccs_mac_keywords[ccs_pnnn2mac[bit]]); |
1461 |
kumaneko |
3780 |
ccs_print_name_union(head, &ptr->name); |
1462 |
|
|
ccs_print_number_union(head, &ptr->mode); |
1463 |
|
|
ccs_print_number_union(head, &ptr->major); |
1464 |
|
|
ccs_print_number_union(head, &ptr->minor); |
1465 |
kumaneko |
3772 |
} else if (acl_type == CCS_TYPE_PATH2_ACL) { |
1466 |
kumaneko |
3780 |
struct ccs_path2_acl *ptr = |
1467 |
|
|
container_of(acl, typeof(*ptr), head); |
1468 |
kumaneko |
3872 |
bit = ccs_fns(ptr->perm, bit); |
1469 |
|
|
if (bit >= CCS_MAX_PATH2_OPERATION) |
1470 |
kumaneko |
3772 |
goto done; |
1471 |
kumaneko |
3872 |
ccs_set_group(head); |
1472 |
|
|
ccs_set_string(head, "file "); |
1473 |
kumaneko |
3968 |
ccs_set_string(head, ccs_mac_keywords[ccs_pp2mac[bit]]); |
1474 |
kumaneko |
3780 |
ccs_print_name_union(head, &ptr->name1); |
1475 |
|
|
ccs_print_name_union(head, &ptr->name2); |
1476 |
kumaneko |
3772 |
} else if (acl_type == CCS_TYPE_PATH_NUMBER_ACL) { |
1477 |
kumaneko |
3780 |
struct ccs_path_number_acl *ptr = |
1478 |
|
|
container_of(acl, typeof(*ptr), head); |
1479 |
kumaneko |
3872 |
bit = ccs_fns(ptr->perm, bit); |
1480 |
|
|
if (bit >= CCS_MAX_PATH_NUMBER_OPERATION) |
1481 |
kumaneko |
3772 |
goto done; |
1482 |
kumaneko |
3872 |
ccs_set_group(head); |
1483 |
|
|
ccs_set_string(head, "file "); |
1484 |
kumaneko |
3968 |
ccs_set_string(head, ccs_mac_keywords[ccs_pn2mac[bit]]); |
1485 |
kumaneko |
3780 |
ccs_print_name_union(head, &ptr->name); |
1486 |
|
|
ccs_print_number_union(head, &ptr->number); |
1487 |
kumaneko |
3772 |
} else if (acl_type == CCS_TYPE_ENV_ACL) { |
1488 |
kumaneko |
3780 |
struct ccs_env_acl *ptr = |
1489 |
|
|
container_of(acl, typeof(*ptr), head); |
1490 |
kumaneko |
3821 |
ccs_set_group(head); |
1491 |
kumaneko |
3808 |
ccs_set_string(head, "misc env "); |
1492 |
kumaneko |
3780 |
ccs_set_string(head, ptr->env->name); |
1493 |
kumaneko |
3772 |
} else if (acl_type == CCS_TYPE_CAPABILITY_ACL) { |
1494 |
kumaneko |
3780 |
struct ccs_capability_acl *ptr = |
1495 |
|
|
container_of(acl, typeof(*ptr), head); |
1496 |
kumaneko |
3821 |
ccs_set_group(head); |
1497 |
kumaneko |
3808 |
ccs_set_string(head, "capability "); |
1498 |
kumaneko |
3968 |
ccs_set_string(head, |
1499 |
|
|
ccs_mac_keywords[ccs_c2mac[ptr->operation]]); |
1500 |
kumaneko |
3911 |
} else if (acl_type == CCS_TYPE_INET_ACL) { |
1501 |
|
|
struct ccs_inet_acl *ptr = |
1502 |
kumaneko |
3780 |
container_of(acl, typeof(*ptr), head); |
1503 |
kumaneko |
3872 |
bit = ccs_fns(ptr->perm, bit); |
1504 |
|
|
if (bit >= CCS_MAX_NETWORK_OPERATION) |
1505 |
kumaneko |
3772 |
goto done; |
1506 |
kumaneko |
3872 |
ccs_set_group(head); |
1507 |
kumaneko |
3911 |
ccs_set_string(head, "network inet "); |
1508 |
kumaneko |
3927 |
ccs_set_string(head, ccs_proto_keyword[ptr->protocol]); |
1509 |
kumaneko |
3843 |
ccs_set_space(head); |
1510 |
kumaneko |
3927 |
ccs_set_string(head, ccs_socket_keyword[bit]); |
1511 |
kumaneko |
3872 |
ccs_set_space(head); |
1512 |
kumaneko |
2916 |
switch (ptr->address_type) { |
1513 |
kumaneko |
3780 |
char buf[128]; |
1514 |
kumaneko |
2916 |
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
1515 |
kumaneko |
3780 |
ccs_set_string(head, "@"); |
1516 |
|
|
ccs_set_string(head, |
1517 |
|
|
ptr->address.group->group_name->name); |
1518 |
kumaneko |
2916 |
break; |
1519 |
|
|
case CCS_IP_ADDRESS_TYPE_IPv4: |
1520 |
kumaneko |
3690 |
ccs_print_ipv4(buf, sizeof(buf), ptr->address.ipv4.min, |
1521 |
|
|
ptr->address.ipv4.max); |
1522 |
kumaneko |
3780 |
ccs_io_printf(head, "%s", buf); |
1523 |
kumaneko |
2916 |
break; |
1524 |
|
|
case CCS_IP_ADDRESS_TYPE_IPv6: |
1525 |
kumaneko |
3690 |
ccs_print_ipv6(buf, sizeof(buf), ptr->address.ipv6.min, |
1526 |
|
|
ptr->address.ipv6.max); |
1527 |
kumaneko |
3780 |
ccs_io_printf(head, "%s", buf); |
1528 |
kumaneko |
2916 |
break; |
1529 |
|
|
} |
1530 |
kumaneko |
3780 |
ccs_print_number_union(head, &ptr->port); |
1531 |
kumaneko |
3911 |
} else if (acl_type == CCS_TYPE_UNIX_ACL) { |
1532 |
|
|
struct ccs_unix_acl *ptr = |
1533 |
|
|
container_of(acl, typeof(*ptr), head); |
1534 |
|
|
bit = ccs_fns(ptr->perm, bit); |
1535 |
|
|
if (bit >= CCS_MAX_NETWORK_OPERATION) |
1536 |
|
|
goto done; |
1537 |
|
|
ccs_set_group(head); |
1538 |
|
|
ccs_set_string(head, "network unix "); |
1539 |
kumaneko |
3927 |
ccs_set_string(head, ccs_proto_keyword[ptr->protocol]); |
1540 |
kumaneko |
3911 |
ccs_set_space(head); |
1541 |
kumaneko |
3927 |
ccs_set_string(head, ccs_socket_keyword[bit]); |
1542 |
kumaneko |
3911 |
ccs_print_name_union(head, &ptr->name); |
1543 |
kumaneko |
3772 |
} else if (acl_type == CCS_TYPE_SIGNAL_ACL) { |
1544 |
kumaneko |
3780 |
struct ccs_signal_acl *ptr = |
1545 |
|
|
container_of(acl, typeof(*ptr), head); |
1546 |
kumaneko |
3821 |
ccs_set_group(head); |
1547 |
kumaneko |
3808 |
ccs_set_string(head, "ipc signal "); |
1548 |
|
|
ccs_io_printf(head, "%u ", ptr->sig); |
1549 |
kumaneko |
3780 |
ccs_set_string(head, ptr->domainname->name); |
1550 |
kumaneko |
3772 |
} else if (acl_type == CCS_TYPE_MOUNT_ACL) { |
1551 |
kumaneko |
3780 |
struct ccs_mount_acl *ptr = |
1552 |
|
|
container_of(acl, typeof(*ptr), head); |
1553 |
kumaneko |
3821 |
ccs_set_group(head); |
1554 |
kumaneko |
3808 |
ccs_io_printf(head, "file mount"); |
1555 |
kumaneko |
3780 |
ccs_print_name_union(head, &ptr->dev_name); |
1556 |
|
|
ccs_print_name_union(head, &ptr->dir_name); |
1557 |
|
|
ccs_print_name_union(head, &ptr->fs_type); |
1558 |
|
|
ccs_print_number_union(head, &ptr->flags); |
1559 |
kumaneko |
2863 |
} |
1560 |
kumaneko |
3872 |
head->r.bit = bit + 1; |
1561 |
kumaneko |
3780 |
if (acl->cond) { |
1562 |
|
|
head->r.print_cond_part = true; |
1563 |
|
|
head->r.cond_step = 0; |
1564 |
|
|
if (!ccs_flush(head)) |
1565 |
|
|
return false; |
1566 |
kumaneko |
4049 |
print_cond_part: |
1567 |
kumaneko |
3780 |
if (!ccs_print_condition(head, acl->cond)) |
1568 |
|
|
return false; |
1569 |
|
|
head->r.print_cond_part = false; |
1570 |
|
|
} else { |
1571 |
|
|
ccs_set_lf(head); |
1572 |
kumaneko |
2897 |
} |
1573 |
kumaneko |
3872 |
switch (acl_type) { |
1574 |
|
|
case CCS_TYPE_PATH_ACL: |
1575 |
|
|
case CCS_TYPE_MKDEV_ACL: |
1576 |
|
|
case CCS_TYPE_PATH2_ACL: |
1577 |
|
|
case CCS_TYPE_PATH_NUMBER_ACL: |
1578 |
kumaneko |
3911 |
case CCS_TYPE_INET_ACL: |
1579 |
|
|
case CCS_TYPE_UNIX_ACL: |
1580 |
kumaneko |
3872 |
goto next; |
1581 |
|
|
} |
1582 |
kumaneko |
4049 |
done: |
1583 |
kumaneko |
3872 |
head->r.bit = 0; |
1584 |
kumaneko |
3747 |
return true; |
1585 |
kumaneko |
2863 |
} |
1586 |
|
|
|
1587 |
|
|
/** |
1588 |
kumaneko |
3697 |
* ccs_read_domain2 - Read domain policy. |
1589 |
|
|
* |
1590 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1591 |
|
|
* @domain: Pointer to "struct ccs_domain_info". |
1592 |
kumaneko |
3924 |
* @index: Index number. |
1593 |
kumaneko |
3697 |
* |
1594 |
kumaneko |
4084 |
* Returns true on success, false otherwise. |
1595 |
|
|
* |
1596 |
kumaneko |
3697 |
* Caller holds ccs_read_lock(). |
1597 |
|
|
*/ |
1598 |
|
|
static bool ccs_read_domain2(struct ccs_io_buffer *head, |
1599 |
kumaneko |
3924 |
struct ccs_domain_info *domain, |
1600 |
|
|
const u8 index) |
1601 |
kumaneko |
3697 |
{ |
1602 |
kumaneko |
3924 |
list_for_each_cookie(head->r.acl, &domain->acl_info_list[index]) { |
1603 |
kumaneko |
3780 |
struct ccs_acl_info *ptr = |
1604 |
|
|
list_entry(head->r.acl, typeof(*ptr), list); |
1605 |
kumaneko |
3697 |
if (!ccs_print_entry(head, ptr)) |
1606 |
|
|
return false; |
1607 |
|
|
} |
1608 |
kumaneko |
3780 |
head->r.acl = NULL; |
1609 |
kumaneko |
3697 |
return true; |
1610 |
|
|
} |
1611 |
|
|
|
1612 |
|
|
/** |
1613 |
kumaneko |
3693 |
* ccs_read_domain - Read domain policy. |
1614 |
kumaneko |
2863 |
* |
1615 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1616 |
|
|
* |
1617 |
kumaneko |
4084 |
* Returns nothing. |
1618 |
|
|
* |
1619 |
kumaneko |
2863 |
* Caller holds ccs_read_lock(). |
1620 |
|
|
*/ |
1621 |
kumaneko |
3693 |
static void ccs_read_domain(struct ccs_io_buffer *head) |
1622 |
kumaneko |
2863 |
{ |
1623 |
kumaneko |
3780 |
if (head->r.eof) |
1624 |
kumaneko |
2943 |
return; |
1625 |
kumaneko |
3780 |
list_for_each_cookie(head->r.domain, &ccs_domain_list) { |
1626 |
kumaneko |
3697 |
struct ccs_domain_info *domain = |
1627 |
kumaneko |
3780 |
list_entry(head->r.domain, typeof(*domain), list); |
1628 |
|
|
switch (head->r.step) { |
1629 |
kumaneko |
3747 |
u8 i; |
1630 |
kumaneko |
3697 |
case 0: |
1631 |
kumaneko |
3780 |
if (domain->is_deleted && |
1632 |
|
|
!head->r.print_this_domain_only) |
1633 |
kumaneko |
3697 |
continue; |
1634 |
|
|
/* Print domainname and flags. */ |
1635 |
kumaneko |
3780 |
ccs_set_string(head, domain->domainname->name); |
1636 |
|
|
ccs_set_lf(head); |
1637 |
kumaneko |
3968 |
ccs_io_printf(head, "use_profile %u\n", |
1638 |
kumaneko |
3780 |
domain->profile); |
1639 |
kumaneko |
3968 |
ccs_io_printf(head, "use_group %u\n", domain->group); |
1640 |
kumaneko |
3747 |
for (i = 0; i < CCS_MAX_DOMAIN_INFO_FLAGS; i++) |
1641 |
kumaneko |
3780 |
if (domain->flags[i]) |
1642 |
|
|
ccs_set_string(head, ccs_dif[i]); |
1643 |
|
|
head->r.step++; |
1644 |
|
|
ccs_set_lf(head); |
1645 |
kumaneko |
3697 |
/* fall through */ |
1646 |
|
|
case 1: |
1647 |
kumaneko |
3924 |
if (!ccs_read_domain2(head, domain, 0)) |
1648 |
kumaneko |
3697 |
return; |
1649 |
kumaneko |
3780 |
head->r.step++; |
1650 |
kumaneko |
3924 |
/* fall through */ |
1651 |
|
|
case 2: |
1652 |
|
|
if (!ccs_read_domain2(head, domain, 1)) |
1653 |
|
|
return; |
1654 |
|
|
head->r.step++; |
1655 |
kumaneko |
3780 |
if (!ccs_set_lf(head)) |
1656 |
|
|
return; |
1657 |
kumaneko |
3697 |
/* fall through */ |
1658 |
kumaneko |
3924 |
case 3: |
1659 |
kumaneko |
3780 |
head->r.step = 0; |
1660 |
|
|
if (head->r.print_this_domain_only) |
1661 |
|
|
goto done; |
1662 |
kumaneko |
2863 |
} |
1663 |
|
|
} |
1664 |
kumaneko |
4049 |
done: |
1665 |
kumaneko |
3780 |
head->r.eof = true; |
1666 |
kumaneko |
2863 |
} |
1667 |
|
|
|
1668 |
|
|
/** |
1669 |
|
|
* ccs_write_domain_profile - Assign profile for specified domain. |
1670 |
|
|
* |
1671 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1672 |
|
|
* |
1673 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1674 |
|
|
* |
1675 |
|
|
* This is equivalent to doing |
1676 |
|
|
* |
1677 |
|
|
* ( echo "select " $domainname; echo "use_profile " $profile ) | |
1678 |
kumaneko |
2948 |
* /usr/sbin/ccs-loadpolicy -d |
1679 |
kumaneko |
2863 |
* |
1680 |
|
|
* Caller holds ccs_read_lock(). |
1681 |
|
|
*/ |
1682 |
|
|
static int ccs_write_domain_profile(struct ccs_io_buffer *head) |
1683 |
|
|
{ |
1684 |
|
|
char *data = head->write_buf; |
1685 |
|
|
char *cp = strchr(data, ' '); |
1686 |
|
|
struct ccs_domain_info *domain; |
1687 |
|
|
unsigned int profile; |
1688 |
|
|
if (!cp) |
1689 |
|
|
return -EINVAL; |
1690 |
|
|
*cp = '\0'; |
1691 |
|
|
profile = simple_strtoul(data, NULL, 10); |
1692 |
kumaneko |
2892 |
if (profile >= CCS_MAX_PROFILES) |
1693 |
kumaneko |
2863 |
return -EINVAL; |
1694 |
|
|
domain = ccs_find_domain(cp + 1); |
1695 |
kumaneko |
2991 |
if (domain && (!ccs_policy_loaded || ccs_profile_ptr[(u8) profile])) |
1696 |
kumaneko |
2863 |
domain->profile = (u8) profile; |
1697 |
|
|
return 0; |
1698 |
|
|
} |
1699 |
|
|
|
1700 |
|
|
/** |
1701 |
|
|
* ccs_read_domain_profile - Read only domainname and profile. |
1702 |
|
|
* |
1703 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1704 |
|
|
* |
1705 |
kumaneko |
4084 |
* Returns nothing. |
1706 |
|
|
* |
1707 |
kumaneko |
2863 |
* This is equivalent to doing |
1708 |
|
|
* |
1709 |
|
|
* grep -A 1 '^<kernel>' /proc/ccs/domain_policy | |
1710 |
|
|
* awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) |
1711 |
|
|
* domainname = $0; } else if ( $1 == "use_profile" ) { |
1712 |
|
|
* print $2 " " domainname; domainname = ""; } } ; ' |
1713 |
|
|
* |
1714 |
|
|
* Caller holds ccs_read_lock(). |
1715 |
|
|
*/ |
1716 |
kumaneko |
2943 |
static void ccs_read_domain_profile(struct ccs_io_buffer *head) |
1717 |
kumaneko |
2863 |
{ |
1718 |
kumaneko |
3780 |
if (head->r.eof) |
1719 |
kumaneko |
2943 |
return; |
1720 |
kumaneko |
3780 |
list_for_each_cookie(head->r.domain, &ccs_domain_list) { |
1721 |
|
|
struct ccs_domain_info *domain = |
1722 |
|
|
list_entry(head->r.domain, typeof(*domain), list); |
1723 |
kumaneko |
2863 |
if (domain->is_deleted) |
1724 |
|
|
continue; |
1725 |
kumaneko |
3780 |
if (!ccs_flush(head)) |
1726 |
kumaneko |
2943 |
return; |
1727 |
kumaneko |
3780 |
ccs_io_printf(head, "%u ", domain->profile); |
1728 |
|
|
ccs_set_string(head, domain->domainname->name); |
1729 |
|
|
ccs_set_lf(head); |
1730 |
kumaneko |
2863 |
} |
1731 |
kumaneko |
3780 |
head->r.eof = true; |
1732 |
kumaneko |
2863 |
} |
1733 |
|
|
|
1734 |
|
|
/** |
1735 |
kumaneko |
4086 |
* ccs_write_pid - Specify PID to obtain domainname. |
1736 |
kumaneko |
2863 |
* |
1737 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1738 |
|
|
* |
1739 |
|
|
* Returns 0. |
1740 |
|
|
*/ |
1741 |
|
|
static int ccs_write_pid(struct ccs_io_buffer *head) |
1742 |
|
|
{ |
1743 |
kumaneko |
3780 |
head->r.eof = false; |
1744 |
kumaneko |
2863 |
return 0; |
1745 |
|
|
} |
1746 |
|
|
|
1747 |
|
|
/** |
1748 |
|
|
* ccs_read_pid - Read information of a process. |
1749 |
|
|
* |
1750 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1751 |
|
|
* |
1752 |
|
|
* Returns the domainname which the specified PID is in or |
1753 |
|
|
* process information of the specified PID on success, |
1754 |
|
|
* empty string otherwise. |
1755 |
|
|
* |
1756 |
|
|
* Caller holds ccs_read_lock(). |
1757 |
|
|
*/ |
1758 |
kumaneko |
2943 |
static void ccs_read_pid(struct ccs_io_buffer *head) |
1759 |
kumaneko |
2863 |
{ |
1760 |
|
|
char *buf = head->write_buf; |
1761 |
|
|
bool task_info = false; |
1762 |
kumaneko |
2970 |
bool global_pid = false; |
1763 |
kumaneko |
2863 |
unsigned int pid; |
1764 |
|
|
struct task_struct *p; |
1765 |
|
|
struct ccs_domain_info *domain = NULL; |
1766 |
|
|
u32 ccs_flags = 0; |
1767 |
|
|
/* Accessing write_buf is safe because head->io_sem is held. */ |
1768 |
kumaneko |
3136 |
if (!buf) { |
1769 |
kumaneko |
3780 |
head->r.eof = true; |
1770 |
kumaneko |
2943 |
return; /* Do nothing if open(O_RDONLY). */ |
1771 |
kumaneko |
3136 |
} |
1772 |
kumaneko |
3780 |
if (head->r.w_pos || head->r.eof) |
1773 |
kumaneko |
2943 |
return; |
1774 |
kumaneko |
3780 |
head->r.eof = true; |
1775 |
kumaneko |
2863 |
if (ccs_str_starts(&buf, "info ")) |
1776 |
|
|
task_info = true; |
1777 |
kumaneko |
2970 |
if (ccs_str_starts(&buf, "global-pid ")) |
1778 |
|
|
global_pid = true; |
1779 |
kumaneko |
2863 |
pid = (unsigned int) simple_strtoul(buf, NULL, 10); |
1780 |
kumaneko |
3248 |
ccs_tasklist_lock(); |
1781 |
kumaneko |
2970 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
1782 |
|
|
if (global_pid) |
1783 |
kumaneko |
3502 |
p = ccsecurity_exports.find_task_by_pid_ns(pid, &init_pid_ns); |
1784 |
kumaneko |
2970 |
else |
1785 |
kumaneko |
3502 |
p = ccsecurity_exports.find_task_by_vpid(pid); |
1786 |
kumaneko |
2970 |
#else |
1787 |
kumaneko |
2863 |
p = find_task_by_pid(pid); |
1788 |
kumaneko |
2970 |
#endif |
1789 |
kumaneko |
2863 |
if (p) { |
1790 |
|
|
domain = ccs_task_domain(p); |
1791 |
kumaneko |
4049 |
ccs_flags = ccs_task_flags(p); |
1792 |
kumaneko |
2863 |
} |
1793 |
kumaneko |
3248 |
ccs_tasklist_unlock(); |
1794 |
kumaneko |
2863 |
if (!domain) |
1795 |
kumaneko |
2943 |
return; |
1796 |
kumaneko |
3780 |
if (!task_info) { |
1797 |
|
|
ccs_io_printf(head, "%u %u ", pid, domain->profile); |
1798 |
|
|
ccs_set_string(head, domain->domainname->name); |
1799 |
|
|
} else { |
1800 |
kumaneko |
3924 |
ccs_io_printf(head, "%u manager=%s execute_handler=%s ", pid, |
1801 |
kumaneko |
2958 |
ccs_yesno(ccs_flags & |
1802 |
kumaneko |
3693 |
CCS_TASK_IS_MANAGER), |
1803 |
kumaneko |
2958 |
ccs_yesno(ccs_flags & |
1804 |
kumaneko |
3924 |
CCS_TASK_IS_EXECUTE_HANDLER)); |
1805 |
kumaneko |
3780 |
} |
1806 |
kumaneko |
2863 |
} |
1807 |
|
|
|
1808 |
kumaneko |
4063 |
/* String table for domain transition control keywords. */ |
1809 |
kumaneko |
3968 |
static const char * const ccs_transition_type[CCS_MAX_TRANSITION_TYPE] = { |
1810 |
|
|
[CCS_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", |
1811 |
|
|
[CCS_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", |
1812 |
|
|
[CCS_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", |
1813 |
|
|
[CCS_TRANSITION_CONTROL_KEEP] = "keep_domain ", |
1814 |
kumaneko |
3752 |
}; |
1815 |
|
|
|
1816 |
kumaneko |
4063 |
/* String table for grouping keywords. */ |
1817 |
kumaneko |
3968 |
static const char * const ccs_group_name[CCS_MAX_GROUP] = { |
1818 |
|
|
[CCS_PATH_GROUP] = "path_group ", |
1819 |
|
|
[CCS_NUMBER_GROUP] = "number_group ", |
1820 |
|
|
[CCS_ADDRESS_GROUP] = "address_group ", |
1821 |
kumaneko |
3752 |
}; |
1822 |
|
|
|
1823 |
kumaneko |
2863 |
/** |
1824 |
kumaneko |
3693 |
* ccs_write_exception - Write exception policy. |
1825 |
kumaneko |
2863 |
* |
1826 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1827 |
|
|
* |
1828 |
|
|
* Returns 0 on success, negative value otherwise. |
1829 |
|
|
*/ |
1830 |
kumaneko |
3693 |
static int ccs_write_exception(struct ccs_io_buffer *head) |
1831 |
kumaneko |
2863 |
{ |
1832 |
|
|
char *data = head->write_buf; |
1833 |
kumaneko |
3968 |
const bool is_delete = ccs_str_starts(&data, "delete "); |
1834 |
kumaneko |
3691 |
u8 i; |
1835 |
|
|
static const struct { |
1836 |
|
|
const char *keyword; |
1837 |
kumaneko |
3752 |
int (*write) (char *, const bool); |
1838 |
kumaneko |
4049 |
} ccs_callback[2] = { |
1839 |
kumaneko |
3968 |
{ "aggregator ", ccs_write_aggregator }, |
1840 |
|
|
{ "deny_autobind ", ccs_write_reserved_port }, |
1841 |
kumaneko |
3691 |
}; |
1842 |
kumaneko |
4049 |
for (i = 0; i < 2; i++) |
1843 |
kumaneko |
3691 |
if (ccs_str_starts(&data, ccs_callback[i].keyword)) |
1844 |
kumaneko |
3752 |
return ccs_callback[i].write(data, is_delete); |
1845 |
kumaneko |
3781 |
for (i = 0; i < CCS_MAX_TRANSITION_TYPE; i++) |
1846 |
kumaneko |
3752 |
if (ccs_str_starts(&data, ccs_transition_type[i])) |
1847 |
|
|
return ccs_write_transition_control(data, is_delete, |
1848 |
|
|
i); |
1849 |
kumaneko |
3781 |
for (i = 0; i < CCS_MAX_GROUP; i++) |
1850 |
kumaneko |
3752 |
if (ccs_str_starts(&data, ccs_group_name[i])) |
1851 |
kumaneko |
3693 |
return ccs_write_group(data, is_delete, i); |
1852 |
kumaneko |
3821 |
if (ccs_str_starts(&data, "acl_group ")) { |
1853 |
|
|
unsigned int group; |
1854 |
|
|
if (sscanf(data, "%u", &group) == 1 && |
1855 |
|
|
group < CCS_MAX_ACL_GROUPS) { |
1856 |
|
|
data = strchr(data, ' '); |
1857 |
|
|
if (data) |
1858 |
|
|
return ccs_write_domain2(data + 1, |
1859 |
|
|
&ccs_acl_group[group], |
1860 |
|
|
is_delete); |
1861 |
|
|
} |
1862 |
|
|
} |
1863 |
|
|
return -EINVAL; |
1864 |
kumaneko |
2863 |
} |
1865 |
|
|
|
1866 |
|
|
/** |
1867 |
kumaneko |
3689 |
* ccs_read_group - Read "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group" list. |
1868 |
kumaneko |
2863 |
* |
1869 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1870 |
kumaneko |
3689 |
* @idx: Index number. |
1871 |
kumaneko |
2863 |
* |
1872 |
kumaneko |
3689 |
* Returns true on success, false otherwise. |
1873 |
|
|
* |
1874 |
kumaneko |
2863 |
* Caller holds ccs_read_lock(). |
1875 |
|
|
*/ |
1876 |
kumaneko |
3689 |
static bool ccs_read_group(struct ccs_io_buffer *head, const int idx) |
1877 |
kumaneko |
2863 |
{ |
1878 |
kumaneko |
3780 |
list_for_each_cookie(head->r.group, &ccs_group_list[idx]) { |
1879 |
kumaneko |
3689 |
struct ccs_group *group = |
1880 |
kumaneko |
3780 |
list_entry(head->r.group, typeof(*group), head.list); |
1881 |
|
|
list_for_each_cookie(head->r.acl, &group->member_list) { |
1882 |
kumaneko |
3689 |
struct ccs_acl_head *ptr = |
1883 |
kumaneko |
3780 |
list_entry(head->r.acl, typeof(*ptr), list); |
1884 |
kumaneko |
3689 |
if (ptr->is_deleted) |
1885 |
|
|
continue; |
1886 |
kumaneko |
3780 |
if (!ccs_flush(head)) |
1887 |
|
|
return false; |
1888 |
|
|
ccs_set_string(head, ccs_group_name[idx]); |
1889 |
|
|
ccs_set_string(head, group->group_name->name); |
1890 |
kumaneko |
3689 |
if (idx == CCS_PATH_GROUP) { |
1891 |
kumaneko |
3780 |
ccs_set_space(head); |
1892 |
|
|
ccs_set_string(head, container_of |
1893 |
|
|
(ptr, struct ccs_path_group, |
1894 |
|
|
head)->member_name->name); |
1895 |
kumaneko |
3689 |
} else if (idx == CCS_NUMBER_GROUP) { |
1896 |
kumaneko |
3780 |
ccs_print_number_union(head, &container_of |
1897 |
kumaneko |
4049 |
(ptr, struct ccs_number_group, |
1898 |
|
|
head)->number); |
1899 |
kumaneko |
3689 |
} else if (idx == CCS_ADDRESS_GROUP) { |
1900 |
kumaneko |
3780 |
char buffer[128]; |
1901 |
kumaneko |
3689 |
struct ccs_address_group *member = |
1902 |
|
|
container_of(ptr, typeof(*member), |
1903 |
|
|
head); |
1904 |
kumaneko |
3690 |
if (member->is_ipv6) |
1905 |
|
|
ccs_print_ipv6(buffer, sizeof(buffer), |
1906 |
|
|
member->min.ipv6, |
1907 |
|
|
member->max.ipv6); |
1908 |
|
|
else |
1909 |
|
|
ccs_print_ipv4(buffer, sizeof(buffer), |
1910 |
|
|
member->min.ipv4, |
1911 |
|
|
member->max.ipv4); |
1912 |
kumaneko |
3780 |
ccs_io_printf(head, " %s", buffer); |
1913 |
kumaneko |
3689 |
} |
1914 |
kumaneko |
3780 |
ccs_set_lf(head); |
1915 |
kumaneko |
3689 |
} |
1916 |
kumaneko |
3780 |
head->r.acl = NULL; |
1917 |
kumaneko |
3689 |
} |
1918 |
kumaneko |
3780 |
head->r.group = NULL; |
1919 |
kumaneko |
3689 |
return true; |
1920 |
|
|
} |
1921 |
|
|
|
1922 |
|
|
/** |
1923 |
|
|
* ccs_read_policy - Read "struct ccs_..._entry" list. |
1924 |
|
|
* |
1925 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1926 |
|
|
* @idx: Index number. |
1927 |
|
|
* |
1928 |
|
|
* Returns true on success, false otherwise. |
1929 |
|
|
* |
1930 |
|
|
* Caller holds ccs_read_lock(). |
1931 |
|
|
*/ |
1932 |
|
|
static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx) |
1933 |
|
|
{ |
1934 |
kumaneko |
3780 |
list_for_each_cookie(head->r.acl, &ccs_policy_list[idx]) { |
1935 |
|
|
struct ccs_acl_head *acl = |
1936 |
|
|
container_of(head->r.acl, typeof(*acl), list); |
1937 |
kumaneko |
3689 |
if (acl->is_deleted) |
1938 |
|
|
continue; |
1939 |
kumaneko |
3780 |
if (!ccs_flush(head)) |
1940 |
|
|
return false; |
1941 |
kumaneko |
3689 |
switch (idx) { |
1942 |
kumaneko |
3752 |
case CCS_ID_TRANSITION_CONTROL: |
1943 |
kumaneko |
3689 |
{ |
1944 |
kumaneko |
3752 |
struct ccs_transition_control *ptr = |
1945 |
kumaneko |
3689 |
container_of(acl, typeof(*ptr), head); |
1946 |
kumaneko |
3780 |
ccs_set_string(head, |
1947 |
|
|
ccs_transition_type[ptr->type]); |
1948 |
|
|
ccs_set_string(head, ptr->program ? |
1949 |
|
|
ptr->program->name : "any"); |
1950 |
|
|
ccs_set_string(head, " from "); |
1951 |
|
|
ccs_set_string(head, ptr->domainname ? |
1952 |
|
|
ptr->domainname->name : "any"); |
1953 |
kumaneko |
3689 |
} |
1954 |
kumaneko |
2863 |
break; |
1955 |
kumaneko |
3689 |
case CCS_ID_AGGREGATOR: |
1956 |
|
|
{ |
1957 |
kumaneko |
3693 |
struct ccs_aggregator *ptr = |
1958 |
kumaneko |
3689 |
container_of(acl, typeof(*ptr), head); |
1959 |
kumaneko |
3968 |
ccs_set_string(head, "aggregator "); |
1960 |
kumaneko |
3780 |
ccs_set_string(head, ptr->original_name->name); |
1961 |
|
|
ccs_set_space(head); |
1962 |
|
|
ccs_set_string(head, |
1963 |
|
|
ptr->aggregated_name->name); |
1964 |
kumaneko |
3689 |
} |
1965 |
kumaneko |
2943 |
break; |
1966 |
kumaneko |
3689 |
case CCS_ID_RESERVEDPORT: |
1967 |
|
|
{ |
1968 |
kumaneko |
3693 |
struct ccs_reserved *ptr = |
1969 |
kumaneko |
3689 |
container_of(acl, typeof(*ptr), head); |
1970 |
|
|
const u16 min_port = ptr->min_port; |
1971 |
|
|
const u16 max_port = ptr->max_port; |
1972 |
kumaneko |
3968 |
ccs_set_string(head, "deny_autobind "); |
1973 |
kumaneko |
3780 |
ccs_io_printf(head, "%u", min_port); |
1974 |
|
|
if (min_port != max_port) |
1975 |
|
|
ccs_io_printf(head, "-%u", max_port); |
1976 |
kumaneko |
3689 |
} |
1977 |
kumaneko |
2943 |
break; |
1978 |
kumaneko |
3696 |
default: |
1979 |
|
|
continue; |
1980 |
kumaneko |
3689 |
} |
1981 |
kumaneko |
3780 |
ccs_set_lf(head); |
1982 |
kumaneko |
2863 |
} |
1983 |
kumaneko |
3780 |
head->r.acl = NULL; |
1984 |
kumaneko |
3689 |
return true; |
1985 |
kumaneko |
2863 |
} |
1986 |
|
|
|
1987 |
kumaneko |
2897 |
/** |
1988 |
kumaneko |
3693 |
* ccs_read_exception - Read exception policy. |
1989 |
kumaneko |
3689 |
* |
1990 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1991 |
|
|
* |
1992 |
kumaneko |
4084 |
* Returns nothing. |
1993 |
|
|
* |
1994 |
kumaneko |
3689 |
* Caller holds ccs_read_lock(). |
1995 |
|
|
*/ |
1996 |
kumaneko |
3693 |
static void ccs_read_exception(struct ccs_io_buffer *head) |
1997 |
kumaneko |
3689 |
{ |
1998 |
kumaneko |
3780 |
if (head->r.eof) |
1999 |
kumaneko |
3689 |
return; |
2000 |
kumaneko |
3780 |
while (head->r.step < CCS_MAX_POLICY && |
2001 |
|
|
ccs_read_policy(head, head->r.step)) |
2002 |
|
|
head->r.step++; |
2003 |
|
|
if (head->r.step < CCS_MAX_POLICY) |
2004 |
kumaneko |
3689 |
return; |
2005 |
kumaneko |
3780 |
while (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP && |
2006 |
|
|
ccs_read_group(head, head->r.step - CCS_MAX_POLICY)) |
2007 |
|
|
head->r.step++; |
2008 |
|
|
if (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP) |
2009 |
kumaneko |
3697 |
return; |
2010 |
kumaneko |
3821 |
while (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP |
2011 |
kumaneko |
3924 |
+ CCS_MAX_ACL_GROUPS * 2) { |
2012 |
|
|
head->r.group_index = (head->r.step - CCS_MAX_POLICY |
2013 |
|
|
- CCS_MAX_GROUP) / 2; |
2014 |
kumaneko |
3821 |
if (!ccs_read_domain2(head, |
2015 |
kumaneko |
3924 |
&ccs_acl_group[head->r.group_index], |
2016 |
|
|
head->r.step & 1)) |
2017 |
kumaneko |
3821 |
return; |
2018 |
|
|
head->r.step++; |
2019 |
|
|
} |
2020 |
|
|
head->r.eof = true; |
2021 |
kumaneko |
3689 |
} |
2022 |
|
|
|
2023 |
kumaneko |
4063 |
/* Wait queue for kernel -> userspace notification. */ |
2024 |
kumaneko |
2863 |
static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait); |
2025 |
kumaneko |
4063 |
/* Wait queue for userspace -> kernel notification. */ |
2026 |
kumaneko |
4049 |
static DECLARE_WAIT_QUEUE_HEAD(ccs_answer_wait); |
2027 |
kumaneko |
2863 |
|
2028 |
|
|
/* Structure for query. */ |
2029 |
kumaneko |
3781 |
struct ccs_query { |
2030 |
kumaneko |
2863 |
struct list_head list; |
2031 |
|
|
char *query; |
2032 |
|
|
int query_len; |
2033 |
|
|
unsigned int serial; |
2034 |
|
|
int timer; |
2035 |
|
|
int answer; |
2036 |
kumaneko |
4049 |
u8 retry; |
2037 |
kumaneko |
2863 |
}; |
2038 |
|
|
|
2039 |
kumaneko |
3781 |
/* The list for "struct ccs_query". */ |
2040 |
kumaneko |
2863 |
static LIST_HEAD(ccs_query_list); |
2041 |
|
|
|
2042 |
kumaneko |
4084 |
/* Lock for manipulating ccs_query_list. */ |
2043 |
|
|
static DEFINE_SPINLOCK(ccs_query_list_lock); |
2044 |
|
|
|
2045 |
kumaneko |
2863 |
/* Number of "struct file" referring /proc/ccs/query interface. */ |
2046 |
|
|
static atomic_t ccs_query_observers = ATOMIC_INIT(0); |
2047 |
|
|
|
2048 |
kumaneko |
4063 |
/** |
2049 |
|
|
* ccs_truncate - Truncate a line. |
2050 |
|
|
* |
2051 |
|
|
* @str: String to truncate. |
2052 |
|
|
* |
2053 |
|
|
* Returns length of truncated @str. |
2054 |
|
|
*/ |
2055 |
kumaneko |
4049 |
static int ccs_truncate(char *str) |
2056 |
kumaneko |
3761 |
{ |
2057 |
kumaneko |
4049 |
char *start = str; |
2058 |
|
|
while (*(unsigned char *) str > (unsigned char) ' ') |
2059 |
kumaneko |
3761 |
str++; |
2060 |
|
|
*str = '\0'; |
2061 |
kumaneko |
4049 |
return strlen(start) + 1; |
2062 |
kumaneko |
3761 |
} |
2063 |
|
|
|
2064 |
kumaneko |
4063 |
/** |
2065 |
|
|
* ccs_add_entry - Add an ACL to current thread's domain. Used by learning mode. |
2066 |
|
|
* |
2067 |
|
|
* @header: Lines containing ACL. |
2068 |
|
|
* |
2069 |
|
|
* Returns nothing. |
2070 |
|
|
*/ |
2071 |
kumaneko |
4049 |
static void ccs_add_entry(char *header) |
2072 |
|
|
{ |
2073 |
|
|
char *buffer; |
2074 |
|
|
char *realpath = NULL; |
2075 |
|
|
char *argv0 = NULL; |
2076 |
|
|
char *symlink = NULL; |
2077 |
|
|
char *handler; |
2078 |
|
|
char *cp = strchr(header, '\n'); |
2079 |
|
|
int len; |
2080 |
|
|
if (!cp) |
2081 |
|
|
return; |
2082 |
|
|
cp = strchr(cp + 1, '\n'); |
2083 |
|
|
if (!cp) |
2084 |
|
|
return; |
2085 |
|
|
*cp++ = '\0'; |
2086 |
|
|
len = strlen(cp) + 1; |
2087 |
|
|
/* strstr() will return NULL if ordering is wrong. */ |
2088 |
|
|
if (*cp == 'f') { |
2089 |
|
|
argv0 = strstr(header, " argv[]={ \""); |
2090 |
|
|
if (argv0) { |
2091 |
|
|
argv0 += 10; |
2092 |
|
|
len += ccs_truncate(argv0) + 14; |
2093 |
|
|
} |
2094 |
|
|
realpath = strstr(header, " exec={ realpath=\""); |
2095 |
|
|
if (realpath) { |
2096 |
|
|
realpath += 8; |
2097 |
|
|
len += ccs_truncate(realpath) + 6; |
2098 |
|
|
} |
2099 |
|
|
symlink = strstr(header, " symlink.target=\""); |
2100 |
|
|
if (symlink) |
2101 |
|
|
len += ccs_truncate(symlink + 1) + 1; |
2102 |
|
|
} |
2103 |
|
|
handler = strstr(header, "type=execute_handler"); |
2104 |
|
|
if (handler) |
2105 |
|
|
len += ccs_truncate(handler) + 6; |
2106 |
|
|
buffer = kmalloc(len, CCS_GFP_FLAGS); |
2107 |
|
|
if (!buffer) |
2108 |
|
|
return; |
2109 |
|
|
snprintf(buffer, len - 1, "%s", cp); |
2110 |
|
|
if (handler) |
2111 |
|
|
ccs_addprintf(buffer, len, " task.%s", handler); |
2112 |
|
|
if (realpath) |
2113 |
|
|
ccs_addprintf(buffer, len, " exec.%s", realpath); |
2114 |
|
|
if (argv0) |
2115 |
|
|
ccs_addprintf(buffer, len, " exec.argv[0]=%s", argv0); |
2116 |
|
|
if (symlink) |
2117 |
|
|
ccs_addprintf(buffer, len, "%s", symlink); |
2118 |
|
|
ccs_normalize_line(buffer); |
2119 |
|
|
if (!ccs_write_domain2(buffer, ccs_current_domain(), false)) |
2120 |
|
|
ccs_update_stat(CCS_STAT_POLICY_UPDATES); |
2121 |
|
|
kfree(buffer); |
2122 |
|
|
} |
2123 |
|
|
|
2124 |
kumaneko |
2863 |
/** |
2125 |
kumaneko |
2922 |
* ccs_supervisor - Ask for the supervisor's decision. |
2126 |
kumaneko |
2863 |
* |
2127 |
kumaneko |
3701 |
* @r: Pointer to "struct ccs_request_info". |
2128 |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
2129 |
kumaneko |
2863 |
* |
2130 |
|
|
* Returns 0 if the supervisor decided to permit the access request which |
2131 |
kumaneko |
3494 |
* violated the policy in enforcing mode, CCS_RETRY_REQUEST if the supervisor |
2132 |
|
|
* decided to retry the access request which violated the policy in enforcing |
2133 |
|
|
* mode, 0 if it is not in enforcing mode, -EPERM otherwise. |
2134 |
kumaneko |
2863 |
*/ |
2135 |
kumaneko |
2922 |
int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...) |
2136 |
kumaneko |
2863 |
{ |
2137 |
|
|
va_list args; |
2138 |
kumaneko |
4049 |
int error; |
2139 |
kumaneko |
2863 |
int len; |
2140 |
|
|
static unsigned int ccs_serial; |
2141 |
kumaneko |
4049 |
struct ccs_query entry = { }; |
2142 |
kumaneko |
2863 |
bool quota_exceeded = false; |
2143 |
kumaneko |
4055 |
va_start(args, fmt); |
2144 |
|
|
len = vsnprintf((char *) &len, 1, fmt, args) + 1; |
2145 |
|
|
va_end(args); |
2146 |
kumaneko |
4170 |
/* Write /proc/ccs/audit. */ |
2147 |
kumaneko |
3746 |
va_start(args, fmt); |
2148 |
kumaneko |
4055 |
ccs_write_log2(r, len, fmt, args); |
2149 |
kumaneko |
3746 |
va_end(args); |
2150 |
kumaneko |
4049 |
/* Nothing more to do if granted. */ |
2151 |
|
|
if (r->granted) |
2152 |
kumaneko |
2897 |
return 0; |
2153 |
kumaneko |
4049 |
if (r->mode) |
2154 |
|
|
ccs_update_stat(r->mode); |
2155 |
|
|
switch (r->mode) { |
2156 |
kumaneko |
2863 |
int i; |
2157 |
kumaneko |
4049 |
struct ccs_profile *p; |
2158 |
|
|
case CCS_CONFIG_ENFORCING: |
2159 |
|
|
error = -EPERM; |
2160 |
|
|
if (atomic_read(&ccs_query_observers)) |
2161 |
|
|
break; |
2162 |
kumaneko |
4249 |
if (r->dont_sleep_on_enforce_error) |
2163 |
kumaneko |
4049 |
goto out; |
2164 |
|
|
p = ccs_profile(r->profile); |
2165 |
|
|
/* Check enforcing_penalty parameter. */ |
2166 |
|
|
for (i = 0; i < p->pref[CCS_PREF_ENFORCING_PENALTY]; i++) { |
2167 |
kumaneko |
2863 |
set_current_state(TASK_INTERRUPTIBLE); |
2168 |
|
|
schedule_timeout(HZ / 10); |
2169 |
|
|
} |
2170 |
kumaneko |
4049 |
goto out; |
2171 |
|
|
case CCS_CONFIG_LEARNING: |
2172 |
|
|
error = 0; |
2173 |
|
|
/* Check mac_learning_entry parameter. */ |
2174 |
|
|
if (ccs_domain_quota_ok(r)) |
2175 |
|
|
break; |
2176 |
|
|
/* fall through */ |
2177 |
|
|
default: |
2178 |
|
|
return 0; |
2179 |
kumaneko |
2863 |
} |
2180 |
kumaneko |
4049 |
/* Get message. */ |
2181 |
|
|
va_start(args, fmt); |
2182 |
kumaneko |
4055 |
entry.query = ccs_init_log(r, len, fmt, args); |
2183 |
kumaneko |
4049 |
va_end(args); |
2184 |
|
|
if (!entry.query) |
2185 |
kumaneko |
2863 |
goto out; |
2186 |
kumaneko |
4049 |
entry.query_len = strlen(entry.query) + 1; |
2187 |
|
|
if (!error) { |
2188 |
|
|
ccs_add_entry(entry.query); |
2189 |
kumaneko |
2863 |
goto out; |
2190 |
kumaneko |
4049 |
} |
2191 |
kumaneko |
4055 |
len = ccs_round2(entry.query_len); |
2192 |
kumaneko |
2863 |
spin_lock(&ccs_query_list_lock); |
2193 |
kumaneko |
4049 |
if (ccs_memory_quota[CCS_MEMORY_QUERY] && |
2194 |
|
|
ccs_memory_used[CCS_MEMORY_QUERY] + len |
2195 |
|
|
>= ccs_memory_quota[CCS_MEMORY_QUERY]) { |
2196 |
kumaneko |
2863 |
quota_exceeded = true; |
2197 |
|
|
} else { |
2198 |
kumaneko |
4049 |
entry.serial = ccs_serial++; |
2199 |
|
|
entry.retry = r->retry; |
2200 |
|
|
ccs_memory_used[CCS_MEMORY_QUERY] += len; |
2201 |
|
|
list_add_tail(&entry.list, &ccs_query_list); |
2202 |
kumaneko |
2863 |
} |
2203 |
|
|
spin_unlock(&ccs_query_list_lock); |
2204 |
|
|
if (quota_exceeded) |
2205 |
|
|
goto out; |
2206 |
|
|
/* Give 10 seconds for supervisor's opinion. */ |
2207 |
kumaneko |
4049 |
while (entry.timer < 10) { |
2208 |
|
|
wake_up_all(&ccs_query_wait); |
2209 |
|
|
if (wait_event_interruptible_timeout |
2210 |
|
|
(ccs_answer_wait, entry.answer || |
2211 |
|
|
!atomic_read(&ccs_query_observers), HZ)) |
2212 |
kumaneko |
2863 |
break; |
2213 |
kumaneko |
4049 |
else |
2214 |
|
|
entry.timer++; |
2215 |
kumaneko |
2863 |
} |
2216 |
|
|
spin_lock(&ccs_query_list_lock); |
2217 |
kumaneko |
4049 |
list_del(&entry.list); |
2218 |
|
|
ccs_memory_used[CCS_MEMORY_QUERY] -= len; |
2219 |
kumaneko |
2863 |
spin_unlock(&ccs_query_list_lock); |
2220 |
kumaneko |
4049 |
switch (entry.answer) { |
2221 |
kumaneko |
2863 |
case 3: /* Asked to retry by administrator. */ |
2222 |
kumaneko |
3494 |
error = CCS_RETRY_REQUEST; |
2223 |
kumaneko |
2863 |
r->retry++; |
2224 |
|
|
break; |
2225 |
|
|
case 1: |
2226 |
|
|
/* Granted by administrator. */ |
2227 |
|
|
error = 0; |
2228 |
|
|
break; |
2229 |
|
|
default: |
2230 |
kumaneko |
4049 |
/* Timed out or rejected by administrator. */ |
2231 |
kumaneko |
2863 |
break; |
2232 |
|
|
} |
2233 |
kumaneko |
4049 |
out: |
2234 |
|
|
kfree(entry.query); |
2235 |
kumaneko |
2863 |
return error; |
2236 |
|
|
} |
2237 |
|
|
|
2238 |
|
|
/** |
2239 |
|
|
* ccs_poll_query - poll() for /proc/ccs/query. |
2240 |
|
|
* |
2241 |
|
|
* @file: Pointer to "struct file". |
2242 |
|
|
* @wait: Pointer to "poll_table". |
2243 |
|
|
* |
2244 |
|
|
* Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
2245 |
|
|
* |
2246 |
|
|
* Waits for access requests which violated policy in enforcing mode. |
2247 |
|
|
*/ |
2248 |
|
|
static int ccs_poll_query(struct file *file, poll_table *wait) |
2249 |
|
|
{ |
2250 |
|
|
struct list_head *tmp; |
2251 |
|
|
bool found = false; |
2252 |
|
|
u8 i; |
2253 |
|
|
for (i = 0; i < 2; i++) { |
2254 |
|
|
|