diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2009-06-02 08:09:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-11 20:01:56 -0700 |
| commit | e025f408e6c036ce2447096c2bf8a2046c106ed3 (patch) | |
| tree | bbaf6b7fc7fe7ceace20c13fb06ac480b40157cc | |
| parent | 1a7112dad612fff39a34507f1b3032fa4690c31a (diff) | |
ext4: fix locking typo in mballoc which could cause soft lockup hangs
upstream commit: e7c9e3e99adf6c49c5d593a51375916acc039d1e
Smatch (http://repo.or.cz/w/smatch.git/) complains about the locking in
ext4_mb_add_n_trim() from fs/ext4/mballoc.c
4438 list_for_each_entry_rcu(tmp_pa, &lg->lg_prealloc_list[order],
4439 pa_inode_list) {
4440 spin_lock(&tmp_pa->pa_lock);
4441 if (tmp_pa->pa_deleted) {
4442 spin_unlock(&pa->pa_lock);
4443 continue;
4444 }
Brown paper bag time...
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/ext4/mballoc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 5f8702371ef..c7dc1157c1b 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4532,7 +4532,7 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac) pa_inode_list) { spin_lock(&tmp_pa->pa_lock); if (tmp_pa->pa_deleted) { - spin_unlock(&pa->pa_lock); + spin_unlock(&tmp_pa->pa_lock); continue; } if (!added && pa->pa_free < tmp_pa->pa_free) { |