diff options
| author | Tejun Heo <tj@kernel.org> | 2015-08-18 14:55:07 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-08 06:42:00 -0400 |
| commit | afc6ec14b86349b814ba4984f7c02a4d8216e2a9 (patch) | |
| tree | c4a2ebea671da52295d6e28c3364accc9aa630e4 /block | |
| parent | f9fac98fc753ca29e5367c2d81b13ff4eee506a8 (diff) | |
blkcg: use blkg_free() in blkcg_init_queue() failure path
[ Upstream commit 994b78327458ea14a1743196ee0560c73ace37f3 ]
When blkcg_init_queue() fails midway after creating a new blkg, it
performs kfree() directly; however, this doesn't free the policy data
areas. Make it use blkg_free() instead. In turn, blkg_free() is
updated to handle root request_list special case.
While this fixes a possible memory leak, it's on an unlikely failure
path of an already cold path and the size leaked per occurrence is
miniscule too. I don't think it needs to be tagged for -stable.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-cgroup.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 9817c29b4fd0..7104d9e1b5f9 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -54,7 +54,8 @@ static void blkg_free(struct blkcg_gq *blkg) for (i = 0; i < BLKCG_MAX_POLS; i++) kfree(blkg->pd[i]); - blk_exit_rl(&blkg->rl); + if (blkg->blkcg != &blkcg_root) + blk_exit_rl(&blkg->rl); kfree(blkg); } @@ -870,7 +871,7 @@ int blkcg_init_queue(struct request_queue *q) radix_tree_preload_end(); if (IS_ERR(blkg)) { - kfree(new_blkg); + blkg_free(new_blkg); return PTR_ERR(blkg); } |