commit b7131ee0bac5e5df73e4098e77bbddb3a31d06ff
author Christoph Hellwig <hch@lst.de> Sat Nov 14 19:12:46 2020 +0100
committer Jens Axboe <axboe@kernel.dk> Sat Nov 14 11:17:34 2020 -0700
tree 25d8b2e78186bf8150178bb30c6ad1d8df29f3fa
parent 9f16a66733c90b5f33f624b0b0e36a345b0aaf93

blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats

disk_get_part needs to be paired with a disk_put_part.

Cc: stable@vger.kernel.org
Fixes: ef45fe470e1 ("blk-cgroup: show global disk stats in root cgroup io.stat")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-cgroup.c

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index c68bdf5..54fbe1e 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -849,6 +849,7 @@
 			blkg_iostat_set(&blkg->iostat.cur, &tmp);
 			u64_stats_update_end(&blkg->iostat.sync);
 		}
+		disk_put_part(part);
 	}
 }