netdev - [patch net-next v4 20/21] rocker: Add proper validation of Netlink attributes

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Message-Id: <1417084826-9875-21-git-send-email-jiri@resnulli.us>
Date:	Thu, 27 Nov 2014 11:40:25 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, nhorman@...driver.com, andy@...yhouse.net,
	tgraf@...g.ch, dborkman@...hat.com, ogerlitz@...lanox.com,
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Subject: [patch net-next v4 20/21] rocker: Add proper validation of Netlink attributes

From: Thomas Graf <tgraf@...g.ch>

Signed-off-by: Thomas Graf <tgraf@...g.ch>
Signed-off-by: Jiri Pirko <jiri@...nulli.us>
---
new in v4
---
 drivers/net/ethernet/rocker/rocker.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
index 61cfdbf..30687bf 100644
--- a/drivers/net/ethernet/rocker/rocker.c
+++ b/drivers/net/ethernet/rocker/rocker.c
@@ -3712,6 +3712,9 @@ static int rocker_port_bridge_setlink(struct net_device *dev,
 	if (afspec) {
 		attr = nla_find_nested(afspec, IFLA_BRIDGE_MODE);
 		if (attr) {
+			if (nla_len(attr) < sizeof(mode))
+				return -EINVAL;
+
 			mode = nla_get_u16(attr);
 			if (mode != BRIDGE_MODE_SWDEV)
 				return -EINVAL;
@@ -3721,6 +3724,9 @@ static int rocker_port_bridge_setlink(struct net_device *dev,
 	if (protinfo) {
 		attr = nla_find_nested(protinfo, IFLA_BRPORT_LEARNING);
 		if (attr) {
+			if (nla_len(attr) < sizeof(u8))
+				return -EINVAL;
+
 			if (nla_get_u8(attr))
 				rocker_port->brport_flags |= BR_LEARNING;
 			else
@@ -3731,6 +3737,9 @@ static int rocker_port_bridge_setlink(struct net_device *dev,
 		}
 		attr = nla_find_nested(protinfo, IFLA_BRPORT_LEARNING_SYNC);
 		if (attr) {
+			if (nla_len(attr) < sizeof(u8))
+				return -EINVAL;
+
 			if (nla_get_u8(attr))
 				rocker_port->brport_flags |= BR_LEARNING_SYNC;
 			else
-- 
1.9.3

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