diff mbox series

[5.4,106/214] blkcg: fix memleak for iolatency

Message ID 20200901150958.067453405@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH Sept. 1, 2020, 3:09 p.m. UTC 
From: Yufen Yu <yuyufen@huawei.com>

[ Upstream commit 27029b4b18aa5d3b060f0bf2c26dae254132cfce ]

Normally, blkcg_iolatency_exit() will free related memory in iolatency
when cleanup queue. But if blk_throtl_init() return error and queue init
fail, blkcg_iolatency_exit() will not do that for us. Then it cause
memory leak.

Fixes: d70675121546 ("block: introduce blk-iolatency io controller")
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 block/blk-cgroup.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 1eb8895be4c6b..0c7addcd19859 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1219,13 +1219,15 @@  int blkcg_init_queue(struct request_queue *q)
 	if (preloaded)
 		radix_tree_preload_end();
 
-	ret = blk_iolatency_init(q);
+	ret = blk_throtl_init(q);
 	if (ret)
 		goto err_destroy_all;
 
-	ret = blk_throtl_init(q);
-	if (ret)
+	ret = blk_iolatency_init(q);
+	if (ret) {
+		blk_throtl_exit(q);
 		goto err_destroy_all;
+	}
 	return 0;
 
 err_destroy_all: