netdev - [PATCH net-next 8/9] can: raw: fix getsockopt() for new CAN_RAW_XL_VCID

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Tue, 20 Feb 2024 09:46:10 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Simon Horman <horms@...nel.org>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 8/9] can: raw: fix getsockopt() for new CAN_RAW_XL_VCID_OPTS

From: Oliver Hartkopp <socketcan@...tkopp.net>

The code for the CAN_RAW_XL_VCID_OPTS getsockopt() was incompletely adopted
from the CAN_RAW_FILTER getsockopt().

Add the missing put_user() and return statements.

Flagged by Smatch.

Fixes: c83c22ec1493 ("can: canxl: add virtual CAN network identifier support")
Reported-by: Simon Horman <horms@...nel.org>
Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>
Link: https://lore.kernel.org/all/20240219200021.12113-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 net/can/raw.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/can/raw.c b/net/can/raw.c
index cb8e6f788af8..897ffc17d850 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -835,7 +835,9 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 			if (copy_to_user(optval, &ro->raw_vcid_opts, len))
 				err = -EFAULT;
 		}
-		break;
+		if (!err)
+			err = put_user(len, optlen);
+		return err;
 
 	case CAN_RAW_JOIN_FILTERS:
 		if (len > sizeof(int))
-- 
2.43.0