From 95b496b66615d8c43f77702049b1bd01e2f06595 Mon Sep 17 00:00:00 2001 From: Yang Hongyang Date: Wed, 28 May 2008 16:27:28 +0800 Subject: [PATCH] [IPV6]: Fix the data length of get destination options with short length If get destination options with length which is not enough for that option,getsockopt() will still return the real length of the option, which is larger then the buffer space. This is because ipv6_getsockopt_sticky() returns the real length of the option. This patch fix this problem. Signed-off-by: Yang Hongyang Signed-off-by: YOSHIFUJI Hideaki --- 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 aa7bedf780e5..9293b9f0ac23 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -832,7 +832,7 @@ static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, len = min_t(unsigned int, len, ipv6_optlen(hdr)); if (copy_to_user(optval, hdr, len)) return -EFAULT; - return ipv6_optlen(hdr); + return len; } static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, -- 2.20.1