netdev - [PATCH v2] can: test size of struct sockaddr in sendmsg

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Date:	Sat, 15 Jan 2011 20:39:16 +0100
From:	Kurt Van Dijck <kurt.van.dijck@....be>
To:	netdev@...r.kernel.org, socketcan-core@...ts.berlios.de,
	Oliver Hartkopp <socketcan@...tkopp.net>
Subject: [PATCH v2] can: test size of struct sockaddr in sendmsg

This patch makes the CAN socket code conform to the manpage of sendmsg.

Signed-off-by: Kurt Van Dijck <kurt.van.dijck@....be>
Acked-by: Oliver Hartkopp <socketcan@...tkopp.net>
---
 net/can/bcm.c |    3 +++
 net/can/raw.c |    3 +++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/net/can/bcm.c b/net/can/bcm.c
index 6faa825..2f804e4 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -1256,6 +1256,9 @@ static int bcm_sendmsg(struct kiocb *iocb, struct socket *sock,
 		struct sockaddr_can *addr =
 			(struct sockaddr_can *)msg->msg_name;
 
+		if (msg->msg_namelen < sizeof(*addr))
+			return -EINVAL;
+
 		if (addr->can_family != AF_CAN)
 			return -EINVAL;
 
diff --git a/net/can/raw.c b/net/can/raw.c
index e88f610..883e9d7 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -649,6 +649,9 @@ static int raw_sendmsg(struct kiocb *iocb, struct socket *sock,
 		struct sockaddr_can *addr =
 			(struct sockaddr_can *)msg->msg_name;
 
+		if (msg->msg_namelen < sizeof(*addr))
+			return -EINVAL;
+
 		if (addr->can_family != AF_CAN)
 			return -EINVAL;
 
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