linux-kernel - [PATCH 3.16 019/328] scsi: target/iscsi: Make iscsit_ta_authentication() respect the output buffer size

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Message-ID: <lsq.1544392233.434757862@decadent.org.uk>
Date:   Sun, 09 Dec 2018 21:50:33 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Bart Van Assche" <bart.vanassche@....com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "Mike Christie" <mchristi@...hat.com>,
        "Hannes Reinecke" <hare@...e.com>, "Christoph Hellwig" <hch@....de>
Subject: [PATCH 3.16 019/328] scsi: target/iscsi: Make iscsit_ta_authentication()
 respect the output buffer size

3.16.62-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Bart Van Assche <bart.vanassche@....com>

commit 35bea5c84fd13c643cce63f0b5cd4b148f8c901d upstream.

Fixes: e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1")
Signed-off-by: Bart Van Assche <bart.vanassche@....com>
Reviewed-by: Mike Christie <mchristi@...hat.com>
Cc: Mike Christie <mchristi@...hat.com>
Cc: Christoph Hellwig <hch@....de>
Cc: Hannes Reinecke <hare@...e.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/target/iscsi/iscsi_target_tpg.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -652,8 +652,7 @@ int iscsit_ta_authentication(struct iscs
 		none = strstr(buf1, NONE);
 		if (none)
 			goto out;
-		strncat(buf1, ",", strlen(","));
-		strncat(buf1, NONE, strlen(NONE));
+		strlcat(buf1, "," NONE, sizeof(buf1));
 		if (iscsi_update_param_value(param, buf1) < 0)
 			return -EINVAL;
 	}