From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 26 Jul 2005 22:43:17 +0000 (-0700)
Subject: [XFRM]: Fix possible overflow of sock->sk_policy
X-Git-Tag: Ubuntu-goldfish-3.4.0-4.27~40131^2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=a4f1bac62564049ea4718c4624b0fadc9f597c84;p=mirror_ubuntu-zesty-kernel.git

[XFRM]: Fix possible overflow of sock->sk_policy

Spotted by, and original patch by, Balazs Scheidler.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index ecade4893a13..8da3e25b2c4c 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1350,6 +1350,9 @@ static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt,
 	if (nr > XFRM_MAX_DEPTH)
 		return NULL;
 
+	if (p->dir > XFRM_POLICY_OUT)
+		return NULL;
+
 	xp = xfrm_policy_alloc(GFP_KERNEL);
 	if (xp == NULL) {
 		*dir = -ENOBUFS;