From 286930797d74b2c9a5beae84836044f6a836235f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 7 Mar 2007 12:50:46 -0800 Subject: [PATCH] [IPV6]: Handle np->opt being NULL in ipv6_getsockopt_sticky(). Signed-off-by: David S. Miller --- net/ipv6/ipv6_sockglue.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 286c86735aed..4e0561a082d0 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -795,11 +795,15 @@ int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, EXPORT_SYMBOL(compat_ipv6_setsockopt); #endif -static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr, +static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, char __user *optval, int len) { - if (!hdr) + struct ipv6_opt_hdr *hdr; + + if (!opt || !opt->hopopt) return 0; + hdr = opt->hopopt; + len = min_t(int, len, ipv6_optlen(hdr)); if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) return -EFAULT; @@ -940,7 +944,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, { lock_sock(sk); - len = ipv6_getsockopt_sticky(sk, np->opt->hopopt, + len = ipv6_getsockopt_sticky(sk, np->opt, optval, len); release_sock(sk); return put_user(len, optlen); -- 2.20.1