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authorLinus Torvalds <torvalds@linux-foundation.org>2008-11-01 09:50:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-11-01 09:50:38 -0700
commit0a6d2fac615972142715d736289abeeb7382e81d (patch)
tree828bd68949a5d4dd3a958c2be215695170b9b29c /security
parent76f8bef0db031f03bf286c8bbccfaf83f0b22224 (diff)
parent37dd0bd04a3240d2922786d501e2f12cec858fbf (diff)
downloadlinux-linaro-stable-0a6d2fac615972142715d736289abeeb7382e81d.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: SELinux: properly handle empty tty_files list
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 3e3fde7c1d2b..f85597a4d733 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2126,14 +2126,16 @@ static inline void flush_unauthorized_files(struct files_struct *files)
tty = get_current_tty();
if (tty) {
file_list_lock();
- file = list_entry(tty->tty_files.next, typeof(*file), f_u.fu_list);
- if (file) {
+ if (!list_empty(&tty->tty_files)) {
+ struct inode *inode;
+
/* Revalidate access to controlling tty.
Use inode_has_perm on the tty inode directly rather
than using file_has_perm, as this particular open
file may belong to another process and we are only
interested in the inode-based check here. */
- struct inode *inode = file->f_path.dentry->d_inode;
+ file = list_first_entry(&tty->tty_files, struct file, f_u.fu_list);
+ inode = file->f_path.dentry->d_inode;
if (inode_has_perm(current, inode,
FILE__READ | FILE__WRITE, NULL)) {
drop_tty = 1;