linux-kernel - [PATCH 3.10 239/319] mISDN: Fixing missing validation in base_sock

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Message-Id: <1486322541-8206-140-git-send-email-w@1wt.eu>
Date:   Sun,  5 Feb 2017 20:21:01 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Emrah Demir <ed@...sec.com>,
        "David S . Miller" <davem@...emloft.net>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 239/319] mISDN: Fixing missing validation in base_sock_bind()

From: Emrah Demir <ed@...sec.com>

commit b821646826e22f0491708768fccce58eef3f5704 upstream.

Add validation code into mISDN/socket.c

Signed-off-by: Emrah Demir <ed@...sec.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/isdn/mISDN/socket.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 5cefb47..00bd80a 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -717,6 +717,9 @@ base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 	if (!maddr || maddr->family != AF_ISDN)
 		return -EINVAL;
 
+	if (addr_len < sizeof(struct sockaddr_mISDN))
+		return -EINVAL;
+
 	lock_sock(sk);
 
 	if (_pms(sk)->dev) {
-- 
2.8.0.rc2.1.gbe9624a