Commit 5d1b1b3f492f ("ext4: fix BUG when calling ext4_error with locked
block group") introduces ext4_grp_locked_error to handle unlocking a
group in error cases. Otherwise, there is a possibility of a sleep while
atomic. However, since 43c73221b3b1 ("ext4: replace BUG_ON with WARN_ON
in mb_find_extent()"), mb_find_extent() has contained a ext4_error()
call while a group spinlock is held. Replace this with
ext4_grp_locked_error.
Fixes: 43c73221b3b1 ("ext4: replace BUG_ON with WARN_ON in mb_find_extent()")
Cc: <stable@xxxxxxxxxxxxxxx> # 4.14+
Signed-off-by: Stephen Brennan <stephen.s.brennan@xxxxxxxxxx>
Reviewed-by: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
---
fs/ext4/mballoc.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c2c22c2baac0..089c958aa2c3 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1909,10 +1909,11 @@ static int mb_find_extent(struct ext4_buddy *e4b, int block,
if (ex->fe_start + ex->fe_len > EXT4_CLUSTERS_PER_GROUP(e4b->bd_sb)) {
/* Should never happen! (but apparently sometimes does?!?) */
WARN_ON(1);
- ext4_error(e4b->bd_sb, "corruption or bug in mb_find_extent "
- "block=%d, order=%d needed=%d ex=%u/%d/%d@%u",
- block, order, needed, ex->fe_group, ex->fe_start,
- ex->fe_len, ex->fe_logical);
+ ext4_grp_locked_error(e4b->bd_sb, e4b->bd_group, 0, 0,
+ "corruption or bug in mb_find_extent "
+ "block=%d, order=%d needed=%d ex=%u/%d/%d@%u",
+ block, order, needed, ex->fe_group, ex->fe_start,
+ ex->fe_len, ex->fe_logical);
ex->fe_len = 0;
ex->fe_start = 0;
ex->fe_group = 0;
--
2.30.2
