[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>
git-mirror · Jul 26, 2005 · a4f1bac · a4f1bac
1 parent cadf01c
commit a4f1bac
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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;