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authorTejun Heo <tj@kernel.org>2015-07-23 01:05:53 +0300
committerJens Axboe <axboe@fb.com>2015-07-23 01:06:53 +0300
commit5f6c2d2b7dbb541c1e922538c49fa04c494ae3d7 (patch)
treee248b438d0302d71700c38cc5dfa40d85f81b76b /block/blk-cgroup.c
parent21974061cfb3c4b0b1a83447fb5e7cdcd06e56dc (diff)
downloadlinux-5f6c2d2b7dbb541c1e922538c49fa04c494ae3d7.tar.xz
blkcg: fix gendisk reference leak in blkg_conf_prep()
When a blkcg configuration is targeted to a partition rather than a whole device, blkg_conf_prep fails with -EINVAL; unfortunately, it forgets to put the gendisk ref in that case. Fix it. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-cgroup.c')
-rw-r--r--block/blk-cgroup.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 9da02c021ebe..d6283b3f5db5 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -718,8 +718,12 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
return -EINVAL;
disk = get_gendisk(MKDEV(major, minor), &part);
- if (!disk || part)
+ if (!disk)
return -EINVAL;
+ if (part) {
+ put_disk(disk);
+ return -EINVAL;
+ }
rcu_read_lock();
spin_lock_irq(disk->queue->queue_lock);