linux-kernel - [PATCH 5.15 005/277] nbd: Fix incorrect error handle when first_minor is illegal in nbd_dev

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Date:   Tue, 12 Apr 2022 08:26:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ye Bin <yebin10@...wei.com>,
        Josef Bacik <josef@...icpanda.com>,
        Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 005/277] nbd: Fix incorrect error handle when first_minor is illegal in nbd_dev_add

From: Ye Bin <yebin10@...wei.com>

[ Upstream commit 69beb62ff0d1723a750eebe1c4d01da573d7cd19 ]

If first_minor is illegal will 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>
Reviewed-by: Josef Bacik <josef@...icpanda.com>
Link: https://lore.kernel.org/r/20211102015237.2309763-4-yebin10@huawei.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 946fdc1734f4..4ae6c221b36d 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1755,7 +1755,7 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs)
 	disk->first_minor = index << part_shift;
 	if (disk->first_minor < index || disk->first_minor > MINORMASK) {
 		err = -EINVAL;
-		goto out_free_idr;
+		goto out_err_disk;
 	}
 
 	disk->minors = 1 << part_shift;
-- 
2.35.1