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From:   Qinglang Miao <miaoqinglang@huawei.com>
To:     Alasdair Kergon <agk@redhat.com>,
        Mike Snitzer <snitzer@redhat.com>, <dm-devel@redhat.com>
CC:     <linux-kernel@vger.kernel.org>,
        Qinglang Miao <miaoqinglang@huawei.com>
Subject: [PATCH 1/3] dm ioctl: fix error return code in target_message
Date:   Sat, 28 Nov 2020 18:19:59 +0800
Message-ID: <20201128101959.95277-1-miaoqinglang@huawei.com>
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Precedence: bulk

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 2ca4c92f58f9 ("dm ioctl: prevent empty message")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
---
 drivers/md/dm-ioctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index cd0478d44..5e306bba4 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1600,6 +1600,7 @@ static int target_message(struct file *filp, struct dm_ioctl *param, size_t para
 
 	if (!argc) {
 		DMWARN("Empty message received.");
+		r = -EINVAL;
 		goto out_argv;
 	}
 
-- 
2.23.0