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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2011-07-08 13:22:41 +0900
committerJames Morris <jmorris@namei.org>2011-07-11 11:05:32 +1000
commit8761afd49ebff8ae04c1a7888af090177441d07d (patch)
treef43b52e1b8467eeea465762d2f9d0b81a336faa0 /security/tomoyo/audit.c
parent2066a36125fcbf5220990173b9d8e8bc49ad7538 (diff)
downloadlinux-linaro-stable-8761afd49ebff8ae04c1a7888af090177441d07d.tar.gz
TOMOYO: Allow using owner/group etc. of file objects as conditions.
This patch adds support for permission checks using file object's DAC attributes (e.g. owner/group) when checking file's pathnames. Hooks for passing file object's pointers are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/audit.c')
-rw-r--r--security/tomoyo/audit.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/security/tomoyo/audit.c b/security/tomoyo/audit.c
index 9381d0e7f78f..4973edd40718 100644
--- a/security/tomoyo/audit.c
+++ b/security/tomoyo/audit.c
@@ -10,6 +10,35 @@
#include <linux/slab.h>
/**
+ * tomoyo_filetype - Get string representation of file type.
+ *
+ * @mode: Mode value for stat().
+ *
+ * Returns file type string.
+ */
+static inline const char *tomoyo_filetype(const mode_t mode)
+{
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ case 0:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FILE];
+ case S_IFDIR:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_DIRECTORY];
+ case S_IFLNK:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SYMLINK];
+ case S_IFIFO:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FIFO];
+ case S_IFSOCK:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SOCKET];
+ case S_IFBLK:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_BLOCK_DEV];
+ case S_IFCHR:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_CHAR_DEV];
+ }
+ return "unknown"; /* This should not happen. */
+}
+
+/**
* tomoyo_print_header - Get header line of audit log.
*
* @r: Pointer to "struct tomoyo_request_info".
@@ -23,9 +52,11 @@ static char *tomoyo_print_header(struct tomoyo_request_info *r)
{
struct tomoyo_time stamp;
const pid_t gpid = task_pid_nr(current);
+ struct tomoyo_obj_info *obj = r->obj;
static const int tomoyo_buffer_len = 4096;
char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
int pos;
+ u8 i;
if (!buffer)
return NULL;
{
@@ -44,6 +75,47 @@ static char *tomoyo_print_header(struct tomoyo_request_info *r)
current_uid(), current_gid(), current_euid(),
current_egid(), current_suid(), current_sgid(),
current_fsuid(), current_fsgid());
+ if (!obj)
+ goto no_obj_info;
+ if (!obj->validate_done) {
+ tomoyo_get_attributes(obj);
+ obj->validate_done = true;
+ }
+ for (i = 0; i < TOMOYO_MAX_PATH_STAT; i++) {
+ struct tomoyo_mini_stat *stat;
+ unsigned int dev;
+ mode_t mode;
+ if (!obj->stat_valid[i])
+ continue;
+ stat = &obj->stat[i];
+ dev = stat->dev;
+ mode = stat->mode;
+ if (i & 1) {
+ pos += snprintf(buffer + pos,
+ tomoyo_buffer_len - 1 - pos,
+ " path%u.parent={ uid=%u gid=%u "
+ "ino=%lu perm=0%o }", (i >> 1) + 1,
+ stat->uid, stat->gid, (unsigned long)
+ stat->ino, stat->mode & S_IALLUGO);
+ continue;
+ }
+ pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
+ " path%u={ uid=%u gid=%u ino=%lu major=%u"
+ " minor=%u perm=0%o type=%s", (i >> 1) + 1,
+ stat->uid, stat->gid, (unsigned long)
+ stat->ino, MAJOR(dev), MINOR(dev),
+ mode & S_IALLUGO, tomoyo_filetype(mode));
+ if (S_ISCHR(mode) || S_ISBLK(mode)) {
+ dev = stat->rdev;
+ pos += snprintf(buffer + pos,
+ tomoyo_buffer_len - 1 - pos,
+ " dev_major=%u dev_minor=%u",
+ MAJOR(dev), MINOR(dev));
+ }
+ pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
+ " }");
+ }
+no_obj_info:
if (pos < tomoyo_buffer_len - 1)
return buffer;
kfree(buffer);