From: Gabriel Krisman Bertazi krisman@collabora.com
[ Upstream commit 52abfcbd57eefdd54737fc8c2dc79d8f46d4a3e5 ]
If new_blkg allocation raced with blk_policy change and blkg_lookup_check fails, new_blkg is leaked.
Acked-by: Tejun Heo tj@kernel.org Signed-off-by: Gabriel Krisman Bertazi krisman@collabora.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-cgroup.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 20d82681a62a..a1282fe901ec 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -909,6 +909,7 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol, blkg = blkg_lookup_check(pos, pol, q); if (IS_ERR(blkg)) { ret = PTR_ERR(blkg); + blkg_free(new_blkg); goto fail_unlock; }