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Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit

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Pull audit fixes from Paul Moore:
 "Two small patches to fix some bugs with the audit-by-executable
  functionality we introduced back in v4.3 (both patches are marked
  for the stable folks)"

* 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit:
  audit: fix exe_file access in audit_exe_compare
  mm: introduce get_task_exe_file
This commit is contained in:
Linus Torvalds
2016-09-01 15:55:56 -07:00
parent 7d1ce606a3 5efc244346
commit 511a8cdb65
4 changed files with 30 additions and 9 deletions
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8
kernel/audit_watch.c
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@@ -19,6 +19,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/file.h>
#include <linux/kernel.h>
#include <linux/audit.h>
#include <linux/kthread.h>
@@ -544,10 +545,11 @@ int audit_exe_compare(struct task_struct *tsk, struct audit_fsnotify_mark *mark)
unsigned long ino;
dev_t dev;
rcu_read_lock();
exe_file = rcu_dereference(tsk->mm->exe_file);
exe_file = get_task_exe_file(tsk);
if (!exe_file)
return 0;
ino = exe_file->f_inode->i_ino;
dev = exe_file->f_inode->i_sb->s_dev;
rcu_read_unlock();
fput(exe_file);
return audit_mark_compare(mark, ino, dev);
}