linux-kernel - [PATCH 4.19 421/421] scsi: scsi_dh_alua: Fix signedness bug in alua

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Date:   Mon, 19 Jul 2021 16:53:52 +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, Martin Wilck <mwilck@...e.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.19 421/421] scsi: scsi_dh_alua: Fix signedness bug in alua_rtpg()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 80927822e8b6be46f488524cd7d5fe683de97fc4 upstream.

The "retval" variable needs to be signed for the error handling to work.

Link: https://lore.kernel.org/r/YLjMEAFNxOas1mIp@mwanda
Fixes: 7e26e3ea0287 ("scsi: scsi_dh_alua: Check for negative result value")
Reviewed-by: Martin Wilck <mwilck@...e.com>
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/device_handler/scsi_dh_alua.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -522,7 +522,8 @@ static int alua_rtpg(struct scsi_device
 	struct alua_port_group *tmp_pg;
 	int len, k, off, bufflen = ALUA_RTPG_SIZE;
 	unsigned char *desc, *buff;
-	unsigned err, retval;
+	unsigned err;
+	int retval;
 	unsigned int tpg_desc_tbl_off;
 	unsigned char orig_transition_tmo;
 	unsigned long flags;