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blkcg: fix memleak for iolatency

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[ 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: d706751215 ("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>
This commit is contained in:
Yufen Yu 2020-08-10 22:21:16 -04:00 • committed by Greg Kroah-Hartman
commit 05c608f630
1 changed files with 5 additions and 3 deletions
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10
block/blk-cgroup.c
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@ -1219,13 +1219,15 @@ int blkcg_init_queue(struct request_queue *q)
if (preloaded)
radix_tree_preload_end();
ret = blk_iolatency_init(q);
if (ret)
goto err_destroy_all;
ret = blk_throtl_init(q);
if (ret)
goto err_destroy_all;
ret = blk_iolatency_init(q);
if (ret) {
blk_throtl_exit(q);
goto err_destroy_all;
}
return 0;
err_destroy_all: