Unverified Commit f18dd64c authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!3651 nbd: get config_lock before sock_shutdown 

Merge Pull Request from: @ci-robot 
 
PR sync from: Li Lingfeng <lilingfeng3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/IDGNAPV7PCYAUJIBHYYJYXVTWOFGQ6A4/ 
 
https://gitee.com/openeuler/kernel/issues/I8S2P0 
 
Link:https://gitee.com/openeuler/kernel/pulls/3651

 

Reviewed-by: default avatarYu Kuai <yukuai3@huawei.com>
Reviewed-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parents 0d41232e 0d0f7abd

drivers/block/nbd.c

+6 −1
Original line number Diff line number Diff line
@@ -1417,13 +1417,18 @@ static int nbd_start_device_ioctl(struct nbd_device *nbd) 
	mutex_unlock(&nbd->config_lock);

	ret = wait_event_interruptible(config->recv_wq,

					 atomic_read(&config->recv_threads) == 0);



	/*

	 * recv_work in flush_workqueue will not get this lock, because nbd_open

	 * will hold nbd->config_refs

	 */

	mutex_lock(&nbd->config_lock);

	if (ret) {

		sock_shutdown(nbd);

		nbd_clear_que(nbd);

	}



	flush_workqueue(nbd->recv_workq);

	mutex_lock(&nbd->config_lock);

	nbd_bdev_reset(nbd);

	/* user requested, ignore socket errors */

	if (test_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags))