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kill-the-bkl/reiserfs: panic in case of lock imbalance

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Until now, trying to unlock the reiserfs write lock whereas the current
task doesn't hold it lead to a simple warning.
We should actually warn and panic in this case to avoid the user datas
to reach an unstable state.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Laurent Riffard <laurent.riffard@free.fr>
This commit is contained in:
Frederic Weisbecker 2009-08-25 04:18:06 +02:00
parent 7e94277050
commit 8050318598
1 changed files with 3 additions and 4 deletions
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7
fs/reiserfs/lock.c
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@ -37,11 +37,10 @@ void reiserfs_write_unlock(struct super_block *s)
/* /*
* Are we unlocking without even holding the lock? * Are we unlocking without even holding the lock?
* Such a situation could even raise a BUG() if we don't * Such a situation must raise a BUG() if we don't want
* want the data become corrupted * to corrupt the data.
*/ */
WARN_ONCE(sb_i->lock_owner != current, BUG_ON(sb_i->lock_owner != current);
"Superblock write lock imbalance");
if (--sb_i->lock_depth == -1) { if (--sb_i->lock_depth == -1) {
sb_i->lock_owner = NULL; sb_i->lock_owner = NULL;