From 41e43134ddda35949974be40520460a12dda3502 Mon Sep 17 00:00:00 2001 From: Zheng Qixing Date: Sat, 12 Apr 2025 17:25:54 +0800 Subject: block: fix resource leak in blk_register_queue() error path [ Upstream commit 40f2eb9b531475dd01b683fdaf61ca3cfd03a51e ] When registering a queue fails after blk_mq_sysfs_register() is successful but the function later encounters an error, we need to clean up the blk_mq_sysfs resources. Add the missing blk_mq_sysfs_unregister() call in the error path to properly clean up these resources and prevent a memory leak. Fixes: 320ae51feed5 ("blk-mq: new multi-queue block IO queueing mechanism") Signed-off-by: Zheng Qixing Reviewed-by: Christoph Hellwig Reviewed-by: Yu Kuai Link: https://lore.kernel.org/r/20250412092554.475218-1-zhengqixing@huaweicloud.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-sysfs.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'block/blk-sysfs.c') diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 692b27266220..0e2520d929e1 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -813,6 +813,8 @@ out_unregister_ia_ranges: out_debugfs_remove: blk_debugfs_remove(disk); mutex_unlock(&q->sysfs_lock); + if (queue_is_mq(q)) + blk_mq_sysfs_unregister(disk); out_put_queue_kobj: kobject_put(&disk->queue_kobj); mutex_unlock(&q->sysfs_dir_lock); -- cgit v1.2.3