From: Wang Qing wangqing@vivo.com
mainline inclusion from mainline-v5.14-rc1 commit 16ad3db3b24cd9f70aa24e93cef0d4a83dece7ac category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I81XCK
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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We must release the queue before freeing the tagset.
Fixes: 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and blk_cleanup_disk") Reported-and-tested-by: syzbot+9ca43ff47167c0ee3466@syzkaller.appspotmail.com Signed-off-by: Wang Qing wangqing@vivo.com Signed-off-by: Guoqing Jiang jiangguoqing@kylinos.cn Reviewed-by: Christoph Hellwig hch@lst.de Link: https://lore.kernel.org/r/20210706040016.1360412-1-guoqing.jiang@linux.dev Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Zhong Jinghua zhongjinghua@huawei.com Signed-off-by: Li Nan linan122@huawei.com --- drivers/block/nbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 7e7d754361d7..76cbff828bdb 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -229,8 +229,8 @@ static void nbd_dev_remove(struct nbd_device *nbd)
if (disk) { del_gendisk(disk); - blk_mq_free_tag_set(&nbd->tag_set); blk_cleanup_disk(disk); + blk_mq_free_tag_set(&nbd->tag_set); }
/*