linux-kernel - [PATCH -next v2 1/2] nbd: Fix incorrect error handle when first_minor big than '0xff' in nbd_dev

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Message-ID: <20211021125231.916081-2-yebin10@huawei.com>
Date:   Thu, 21 Oct 2021 20:52:30 +0800
From:   Ye Bin <yebin10@...wei.com>
To:     <josef@...icpanda.com>, <axboe@...nel.dk>,
        <linux-block@...r.kernel.org>, <nbd@...er.debian.org>
CC:     <linux-kernel@...r.kernel.org>, Ye Bin <yebin10@...wei.com>
Subject: [PATCH -next v2 1/2] nbd: Fix incorrect error handle when first_minor big than '0xff' in nbd_dev_add

If first_minor big than '0xff' goto out_free_idr label, this will miss
cleanup disk.

Fixes: b1a811633f73 ("block: nbd: add sanity check for first_minor")
Signed-off-by: Ye Bin <yebin10@...wei.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 c38971874ea3..6b6ae08ec93b 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1820,7 +1820,7 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs)
 	disk->first_minor = index << part_shift;
 	if (disk->first_minor > 0xff) {
 		err = -EINVAL;
-		goto out_free_idr;
+		goto out_err_disk;
 	}
 
 	disk->minors = 1 << part_shift;
-- 
2.31.1