lkml.org 
[lkml]   [2011]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] audit: fix mark refcounting
From
Ping?

On Mon, Nov 7, 2011 at 3:59 PM, Miklos Szeredi <miklos@szeredi.hu> wrote:
> From: Miklos Szeredi <mszeredi@suse.cz>
>
> Removing the parent of a watched file results in "kernel BUG at
> fs/notify/mark.c:139".
>
> To reproduce
>
>  add "-w /tmp/audit/dir/watched_file" to audit.rules
>  rm -rf /tmp/audit/dir
>
> This is caused by fsnotify_destroy_mark() being called without an
> extra reference taken by the caller.
>
> Reported by Francesco Cosoleto here:
>
>  https://bugzilla.novell.com/show_bug.cgi?id=689860
>
> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
> CC: Al Viro <viro@zeniv.linux.org.uk>
> CC: Eric Paris <eparis@redhat.com>
> CC: stable@vger.kernel.org
> ---
>  kernel/audit_watch.c |    2 ++
>  1 file changed, 2 insertions(+)
>
> Index: linux.git/kernel/audit_watch.c
> ===================================================================
> --- linux.git.orig/kernel/audit_watch.c 2011-09-13 16:08:20.000000000 +0200
> +++ linux.git/kernel/audit_watch.c      2011-11-07 15:19:07.000000000 +0100
> @@ -349,7 +349,9 @@ static void audit_remove_parent_watches(
>        }
>        mutex_unlock(&audit_filter_mutex);
>
> +       audit_get_parent(parent);
>        fsnotify_destroy_mark(&parent->mark);
> +       audit_put_parent(parent);
>  }
>
>  /* Get path information necessary for adding watches. */
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-11-15 15:15    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site