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bcache: destroy dc->writeback_write_wq if failed to create dc->writeback_thread

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commit f54d801dda upstream.

Commit 9baf30972b ("bcache: fix for gc and write-back race") added a
new work queue dc->writeback_write_wq, but forgot to destroy it in the
error condition when creating dc->writeback_thread failed.

This patch destroys dc->writeback_write_wq if kthread_create() returns
error pointer to dc->writeback_thread, then a memory leak is avoided.

Fixes: 9baf30972b ("bcache: fix for gc and write-back race")
Signed-off-by: Coly Li <colyli@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Coly Li 2019-06-28 19:59:44 +08:00 committed by Greg Kroah-Hartman
parent 2ab14861d2
commit f11ba9df8e
1 changed files with 1 additions and 0 deletions
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1
drivers/md/bcache/writeback.c
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@ -807,6 +807,7 @@ int bch_cached_dev_writeback_start(struct cached_dev *dc)
"bcache_writeback");
if (IS_ERR(dc->writeback_thread)) {
cached_dev_put(dc);
destroy_workqueue(dc->writeback_write_wq);
return PTR_ERR(dc->writeback_thread);
}