diff options
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index f7142ba519ab..03ecbfeab849 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -631,11 +631,15 @@ e_inval: return -EINVAL; } -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; @@ -779,7 +783,7 @@ int 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); |