From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 6 Aug 2009 20:27:04 +0000 (+0000)
Subject: can: Fix raw_getname() leak
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e84b90ae5eb3c112d1f208964df1d8156a538289;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

can: Fix raw_getname() leak

raw_getname() can leak 10 bytes of kernel memory to user

(two bytes hole between can_family and can_ifindex,
8 bytes at the end of sockaddr_can structure)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/can/raw.c b/net/can/raw.c
index f4cc44548bda..db3152df7d2b 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -401,6 +401,7 @@ static int raw_getname(struct socket *sock, struct sockaddr *uaddr,
 	if (peer)
 		return -EOPNOTSUPP;
 
+	memset(addr, 0, sizeof(*addr));
 	addr->can_family  = AF_CAN;
 	addr->can_ifindex = ro->ifindex;