From d2b02ed9487ed25832d19534575052e43f8e0c4f Mon Sep 17 00:00:00 2001 From: Chris Wright Date: Fri, 9 Mar 2007 16:19:17 -0800 Subject: [PATCH] [IPV6] fix ipv6_getsockopt_sticky copy_to_user leak User supplied len < 0 can cause leak of kernel memory. Use unsigned compare instead. Signed-off-by: Chris Wright Signed-off-by: David S. Miller --- net/ipv6/ipv6_sockglue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index b82333b9228f..f5f9582a8d39 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -804,7 +804,7 @@ static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, return 0; hdr = opt->hopopt; - len = min_t(int, len, ipv6_optlen(hdr)); + len = min_t(unsigned int, len, ipv6_optlen(hdr)); if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) return -EFAULT; return len; -- 2.20.1