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authorPaolo Abeni <pabeni@redhat.com>2016-01-29 12:30:20 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-03-03 15:07:05 -0800
commite1c4e14bf12eb0a7179eedde41e3a94877a08802 (patch)
tree20dee2170c34658bdb4a9167a3784476eb793e30 /net/ipv6
parente8e729ccd2fee9f0445c4949a1aa7dd610bfa8bd (diff)
ipv6/udp: use sticky pktinfo egress ifindex on connect()
[ Upstream commit 1cdda91871470f15e79375991bd2eddc6e86ddb1 ] Currently, the egress interface index specified via IPV6_PKTINFO is ignored by __ip6_datagram_connect(), so that RFC 3542 section 6.7 can be subverted when the user space application calls connect() before sendmsg(). Fix it by initializing properly flowi6_oif in connect() before performing the route lookup. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/datagram.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 517c55b01ba8..428162155280 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -162,6 +162,9 @@ ipv4_connected:
fl6.fl6_dport = inet->inet_dport;
fl6.fl6_sport = inet->inet_sport;
+ if (!fl6.flowi6_oif)
+ fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
+
if (!fl6.flowi6_oif && (addr_type&IPV6_ADDR_MULTICAST))
fl6.flowi6_oif = np->mcast_oif;