diff options
| author | dann frazier <dann.frazier@canonical.com> | 2010-11-18 15:03:09 -0700 |
|---|---|---|
| committer | AK <andi@firstfloor.org> | 2011-03-31 11:58:03 -0700 |
| commit | ce7f2cfe2de74e8bc53a04c63fd61696b89ffe3e (patch) | |
| tree | 1b44bb5b9bcd5de16d5a49a9df9e2002a1a9fa13 /fs | |
| parent | a9ba6fef50d463c4d089c49df24678a6df1d80c9 (diff) | |
ocfs2_connection_find() returns pointer to bad structure
commit 226291aa4641fa13cb5dec3bcb3379faa83009e2 upstream.
If ocfs2_live_connection_list is empty, ocfs2_connection_find() will return
a pointer to the LIST_HEAD, cast as a ocfs2_live_connection. This can cause
an oops when ocfs2_control_send_down() dereferences c->oc_conn:
Call Trace:
[<ffffffffa00c2a3c>] ocfs2_control_message+0x28c/0x2b0 [ocfs2_stack_user]
[<ffffffffa00c2a95>] ocfs2_control_write+0x35/0xb0 [ocfs2_stack_user]
[<ffffffff81143a88>] vfs_write+0xb8/0x1a0
[<ffffffff8155cc13>] ? do_page_fault+0x153/0x3b0
[<ffffffff811442f1>] sys_write+0x51/0x80
[<ffffffff810121b2>] system_call_fastpath+0x16/0x1b
Fix by explicitly returning NULL if no match is found.
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ocfs2/stack_user.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c index 2dc57bca068..22db114a4f0 100644 --- a/fs/ocfs2/stack_user.c +++ b/fs/ocfs2/stack_user.c @@ -191,7 +191,7 @@ static struct ocfs2_live_connection *ocfs2_connection_find(const char *name) return c; } - return c; + return NULL; } /* |