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| author | Bob Peterson <rpeterso@redhat.com> | 2008-06-09 19:08:23 +0200 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-06-27 10:39:41 +0200 |
| commit | 9171f5a991e7613cbee816874ad8c9515dcab50f (patch) | |
| tree | 6fd5df32583c059344f7ec4b9436b68edecd61c0 /fs/gfs2/ops_super.c | |
| parent | [GFS2] Revise readpage locking (diff) | |
| download | linux-9171f5a991e7613cbee816874ad8c9515dcab50f.tar.xz linux-9171f5a991e7613cbee816874ad8c9515dcab50f.zip | |
[GFS2] kernel panic mounting volume
This patch fixes Red Hat bugzilla bug 450156.
This started with a not-too-improbable mount failure because the
locking protocol was never set back to its proper "lock_dlm" after the
system was rebooted in the middle of a gfs2_fsck. That left a
(purposely) invalid locking protocol in the superblock, which caused an
error when the file system was mounted the next time.
When there's an error mounting, vfs calls DQUOT_OFF, which calls
vfs_quota_off which calls gfs2_sync_fs. Next, gfs2_sync_fs calls
gfs2_log_flush passing s_fs_info. But due to the error, s_fs_info
had been previously set to NULL, and so we have the kernel oops.
My solution in this patch is to test for the NULL value before passing
it. I tested this patch and it fixes the problem.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/ops_super.c')
| -rw-r--r-- | fs/gfs2/ops_super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c index 0b7cc920eb89..66907922109f 100644 --- a/fs/gfs2/ops_super.c +++ b/fs/gfs2/ops_super.c @@ -155,7 +155,7 @@ static void gfs2_write_super(struct super_block *sb) static int gfs2_sync_fs(struct super_block *sb, int wait) { sb->s_dirt = 0; - if (wait) + if (wait && sb->s_fs_info) gfs2_log_flush(sb->s_fs_info, NULL); return 0; } |