inotify: stop kernel memory leak on file creation failure

commit a2ae4cc9a16e211c8a128ba10d22a85431f093ab upstream.

If inotify_init is unable to allocate a new file for the new inotify
group we leak the new group.  This patch drops the reference on the
group on file allocation failure.

Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index bf7f6d776c31a22e71573ef86e00516c195e95e6..5b7c6fe7fb61b25929f4cf6bb20f6328ecafc750 100644 (file)
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -751,6 +751,7 @@ SYSCALL_DEFINE1(inotify_init1, int, flags)
        if (ret >= 0)
                return ret;
 
+       fsnotify_put_group(group);
        atomic_dec(&user->inotify_devs);
 out_free_uid:
        free_uid(user);