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authorJeff Mahoney <jeffm@jeffreymahoney.com>2010-03-29 15:12:39 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2010-03-30 22:13:09 +0200
commitb7b7fa43103a9fb30dbcc60cbd5161fdfc25f904 (patch)
tree8d384f813009478e24ff41505dd2d96ef60c8e52 /fs/reiserfs/super.c
parent2eaa9cfdf33b8d7fb7aff27792192e0019ae8fc6 (diff)
reiserfs: Fix locking BUG during mount failure
Commit 8ebc423238341b52912c7295b045a32477b33f09 (reiserfs: kill-the-BKL) introduced a bug in the mount failure case. The error label releases the lock before calling journal_release_error, but it requires that the lock be held. do_journal_release unlocks and retakes it. When it releases it without it held, we trigger a BUG(). The error_alloc label skips the unlock since the lock isn't held yet but none of the other conditions that are clean up exist yet either. This patch returns immediately after the kzalloc failure and moves the reiserfs_write_unlock after the journal_release_error call. This was reported in https://bugzilla.novell.com/show_bug.cgi?id=591807 Reported-by: Thomas Siedentopf <thomas.siedentopf@novell.com> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: Thomas Siedentopf <thomas.siedentopf@novell.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: 2.6.33.x <stable@kernel.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'fs/reiserfs/super.c')
-rw-r--r--fs/reiserfs/super.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 04bf5d791bd..ab190511bc1 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1618,10 +1618,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
- if (!sbi) {
- errval = -ENOMEM;
- goto error_alloc;
- }
+ if (!sbi)
+ return -ENOMEM;
s->s_fs_info = sbi;
/* Set default values for options: non-aggressive tails, RO on errors */
REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
@@ -1878,12 +1876,12 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
return (0);
error:
- reiserfs_write_unlock(s);
-error_alloc:
if (jinit_done) { /* kill the commit thread, free journal ram */
journal_release_error(NULL, s);
}
+ reiserfs_write_unlock(s);
+
reiserfs_free_bitmap_cache(s);
if (SB_BUFFER_WITH_SB(s))
brelse(SB_BUFFER_WITH_SB(s));