diff options
Diffstat (limited to 'net/ipv6/raw.c')
| -rw-r--r-- | net/ipv6/raw.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index d09329ca326..d6dedc4aec7 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -604,7 +604,7 @@ error: return err; } -static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) +static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) { struct iovec *iov; u8 __user *type = NULL; @@ -616,7 +616,7 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) int i; if (!msg->msg_iov) - return; + return 0; for (i = 0; i < msg->msg_iovlen; i++) { iov = &msg->msg_iov[i]; @@ -638,8 +638,9 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) code = iov->iov_base; if (type && code) { - get_user(fl->fl_icmp_type, type); - get_user(fl->fl_icmp_code, code); + if (get_user(fl->fl_icmp_type, type) || + get_user(fl->fl_icmp_code, code)) + return -EFAULT; probed = 1; } break; @@ -650,7 +651,8 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) /* check if type field is readable or not. */ if (iov->iov_len > 2 - len) { u8 __user *p = iov->iov_base; - get_user(fl->fl_mh_type, &p[2 - len]); + if (get_user(fl->fl_mh_type, &p[2 - len])) + return -EFAULT; probed = 1; } else len += iov->iov_len; @@ -664,6 +666,7 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) if (probed) break; } + return 0; } static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, @@ -787,7 +790,9 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, opt = ipv6_fixup_options(&opt_space, opt); fl.proto = proto; - rawv6_probe_proto_opt(&fl, msg); + err = rawv6_probe_proto_opt(&fl, msg); + if (err) + goto out; ipv6_addr_copy(&fl.fl6_dst, daddr); if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |