linux-kernel - [PATCH v5 6/6] nbd: don't start request if nbd_queue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 9 Sep 2021 22:12:56 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <axboe@...nel.dk>, <josef@...icpanda.com>, <ming.lei@...hat.com>,
        <hch@...radead.org>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <nbd@...er.debian.org>, <yukuai3@...wei.com>, <yi.zhang@...wei.com>
Subject: [PATCH v5 6/6] nbd: don't start request if nbd_queue_rq() failed

Currently, blk_mq_end_request() will be called if nbd_queue_rq()
failed, thus start request in such situation is useless.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
Reviewed-by: Christoph Hellwig <hch@....de>
---
 drivers/block/nbd.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index d298e2b9e6ee..7a963c4ec0d1 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -943,7 +943,6 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 	if (!refcount_inc_not_zero(&nbd->config_refs)) {
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 				    "Socks array is empty\n");
-		blk_mq_start_request(req);
 		return -EINVAL;
 	}
 	config = nbd->config;
@@ -952,7 +951,6 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 				    "Attempted send on invalid socket\n");
 		nbd_config_put(nbd);
-		blk_mq_start_request(req);
 		return -EINVAL;
 	}
 	cmd->status = BLK_STS_OK;
@@ -976,7 +974,6 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 			 */
 			sock_shutdown(nbd);
 			nbd_config_put(nbd);
-			blk_mq_start_request(req);
 			return -EIO;
 		}
 		goto again;
-- 
2.31.1