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MD: Memory leak when flush bio size is zero

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[ Upstream commit af9b926de9 ]

flush_pool is leaked when flush bio size is zero

Fixes: 5a409b4f56 ("MD: fix lock contention for flush bios")
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiao Ni
2018-10-20 08:09:25 +08:00
committed by Greg Kroah-Hartman
parent 64c90d9c15
commit fbf975efbf
1 changed files with 6 additions and 4 deletions
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10
drivers/md/md.c
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@@ -452,10 +452,11 @@ static void md_end_flush(struct bio *fbio)
rdev_dec_pending(rdev, mddev);
if (atomic_dec_and_test(&fi->flush_pending)) {
if (bio->bi_iter.bi_size == 0)
if (bio->bi_iter.bi_size == 0) {
/* an empty barrier - all done */
bio_endio(bio);
else {
mempool_free(fi, mddev->flush_pool);
} else {
INIT_WORK(&fi->flush_work, submit_flushes);
queue_work(md_wq, &fi->flush_work);
}
@@ -509,10 +510,11 @@ void md_flush_request(struct mddev *mddev, struct bio *bio)
rcu_read_unlock();
if (atomic_dec_and_test(&fi->flush_pending)) {
if (bio->bi_iter.bi_size == 0)
if (bio->bi_iter.bi_size == 0) {
/* an empty barrier - all done */
bio_endio(bio);
else {
mempool_free(fi, mddev->flush_pool);
} else {
INIT_WORK(&fi->flush_work, submit_flushes);
queue_work(md_wq, &fi->flush_work);
}