From d1e2777d4f419a865ddccdb9b3412021d0e4de51 Mon Sep 17 00:00:00 2001
From: Abhijith Das <adas@redhat.com>
Date: Thu, 23 Aug 2007 13:33:01 -0500
Subject: [PATCH] [GFS2] panic after can't parse mount arguments

When you try to mount gfs2 with -o garbage, the mount fails and the gfs2
superblock is deallocated and becomes NULL. The vfs comes around later
on and calls gfs2_kill_sb. At this point the hidden gfs2 superblock
pointer (sb->s_fs_info) is NULL and dereferencing it through
gfs2_meta_syncfs causes the panic. (the other function call to
gfs2_delete_debugfs_file() succeeds because this function already checks
for a NULL pointer)

Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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