diff options
Diffstat (limited to 'net/dccp/ipv4.c')
| -rw-r--r-- | net/dccp/ipv4.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index a545ad71201c..8f56e8723c73 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -247,7 +247,6 @@ static int dccp_v4_err(struct sk_buff *skb, u32 info) const u8 offset = iph->ihl << 2; const struct dccp_hdr *dh; struct dccp_sock *dp; - struct inet_sock *inet; const int type = icmp_hdr(skb)->type; const int code = icmp_hdr(skb)->code; struct sock *sk; @@ -255,12 +254,17 @@ static int dccp_v4_err(struct sk_buff *skb, u32 info) int err; struct net *net = dev_net(skb->dev); - /* Only need dccph_dport & dccph_sport which are the first - * 4 bytes in dccp header. + /* For the first __dccp_basic_hdr_len() check, we only need dh->dccph_x, + * which is in byte 7 of the dccp header. * Our caller (icmp_socket_deliver()) already pulled 8 bytes for us. + * + * Later on, we want to access the sequence number fields, which are + * beyond 8 bytes, so we have to pskb_may_pull() ourselves. */ - BUILD_BUG_ON(offsetofend(struct dccp_hdr, dccph_sport) > 8); - BUILD_BUG_ON(offsetofend(struct dccp_hdr, dccph_dport) > 8); + dh = (struct dccp_hdr *)(skb->data + offset); + if (!pskb_may_pull(skb, offset + __dccp_basic_hdr_len(dh))) + return -EINVAL; + iph = (struct iphdr *)skb->data; dh = (struct dccp_hdr *)(skb->data + offset); sk = __inet_lookup_established(net, &dccp_hashinfo, @@ -361,8 +365,7 @@ static int dccp_v4_err(struct sk_buff *skb, u32 info) * --ANK (980905) */ - inet = inet_sk(sk); - if (!sock_owned_by_user(sk) && inet->recverr) { + if (!sock_owned_by_user(sk) && inet_test_bit(RECVERR, sk)) { sk->sk_err = err; sk_error_report(sk); } else { /* Only an error on timeout */ @@ -474,7 +477,8 @@ static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk, .flowi4_oif = inet_iif(skb), .daddr = iph->saddr, .saddr = iph->daddr, - .flowi4_tos = RT_CONN_FLAGS(sk), + .flowi4_tos = ip_sock_rt_tos(sk), + .flowi4_scope = ip_sock_rt_scope(sk), .flowi4_proto = sk->sk_protocol, .fl4_sport = dccp_hdr(skb)->dccph_dport, .fl4_dport = dccp_hdr(skb)->dccph_sport, |