From 85fbaa75037d0b6b786ff18658ddf0b4014ce2a4 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Sat, 23 Nov 2013 00:46:12 +0100 Subject: inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions Commit bceaa90240b6019ed73b49965eac7d167610be69 ("inet: prevent leakage of uninitialized memory to user in recv syscalls") conditionally updated addr_len if the msg_name is written to. The recv_error and rxpmtu functions relied on the recvmsg functions to set up addr_len before. As this does not happen any more we have to pass addr_len to those functions as well and set it to the size of the corresponding sockaddr length. This broke traceroute and such. Fixes: bceaa90240b6 ("inet: prevent leakage of uninitialized memory to user in recv syscalls") Reported-by: Brad Spengler Reported-by: Tom Labanowski Cc: mpb Cc: David S. Miller Cc: Eric Dumazet Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/ipv6/udp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/ipv6/udp.c') diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 81eb8cf8389..bcd5699313c 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -393,10 +393,10 @@ int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, bool slow; if (flags & MSG_ERRQUEUE) - return ipv6_recv_error(sk, msg, len); + return ipv6_recv_error(sk, msg, len, addr_len); if (np->rxpmtu && np->rxopt.bits.rxpmtu) - return ipv6_recv_rxpmtu(sk, msg, len); + return ipv6_recv_rxpmtu(sk, msg, len, addr_len); try_again: skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), -- cgit v1.2.3-70-g09d2 From ce7a3bdf18a8dbcba1409f5d335c56fde432ca89 Mon Sep 17 00:00:00 2001 From: Florent Fourcot Date: Tue, 10 Dec 2013 15:15:46 +0100 Subject: ipv6: do not erase dst address with flow label destination This patch is following b579035ff766c9412e2b92abf5cab794bff102b6 "ipv6: remove old conditions on flow label sharing" Since there is no reason to restrict a label to a destination, we should not erase the destination value of a socket with the value contained in the flow label storage. This patch allows to really have the same flow label to more than one destination. Signed-off-by: Florent Fourcot Reviewed-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/dccp/ipv6.c | 1 - net/ipv6/datagram.c | 1 - net/ipv6/raw.c | 1 - net/ipv6/tcp_ipv6.c | 1 - net/ipv6/udp.c | 1 - net/l2tp/l2tp_ip6.c | 1 - 6 files changed, 6 deletions(-) (limited to 'net/ipv6/udp.c') diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index 4ac71ff7c2e..2b90a786e47 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -851,7 +851,6 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (flowlabel == NULL) return -EINVAL; - usin->sin6_addr = flowlabel->dst; fl6_sock_release(flowlabel); } } diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index 8dfe1f4d3c1..93b1aa34c43 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -73,7 +73,6 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (flowlabel == NULL) return -EINVAL; - usin->sin6_addr = flowlabel->dst; } } diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index 7fb4e14c467..b6bb87e5580 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -792,7 +792,6 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (flowlabel == NULL) return -EINVAL; - daddr = &flowlabel->dst; } } diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 0740f93a114..f67033b4bb6 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -156,7 +156,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr, flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (flowlabel == NULL) return -EINVAL; - usin->sin6_addr = flowlabel->dst; fl6_sock_release(flowlabel); } } diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index bcd5699313c..089c741a399 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1140,7 +1140,6 @@ do_udp_sendmsg: flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (flowlabel == NULL) return -EINVAL; - daddr = &flowlabel->dst; } } diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c index d9b437e5500..bb6e206ea70 100644 --- a/net/l2tp/l2tp_ip6.c +++ b/net/l2tp/l2tp_ip6.c @@ -528,7 +528,6 @@ static int l2tp_ip6_sendmsg(struct kiocb *iocb, struct sock *sk, flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (flowlabel == NULL) return -EINVAL; - daddr = &flowlabel->dst; } } -- cgit v1.2.3-70-g09d2