ipv6: Fix PMTU updates for UDP/raw sockets in presence of VRF
authorDavid Ahern <dsahern@gmail.com>
Sun, 18 Nov 2018 18:45:30 +0000 (10:45 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 23 Nov 2018 07:19:25 +0000 (08:19 +0100)
commit590f89a7ee6b73c928f886010fe2d7a08384874e
tree12c76d8ec0019778d3eb9d8c0d167dc151da2eea
parentdbd5f23bd962198b298d4589565c5c5ada62e3b8
ipv6: Fix PMTU updates for UDP/raw sockets in presence of VRF

[ Upstream commit 7ddacfa564870cdd97275fd87decb6174abc6380 ]

Preethi reported that PMTU discovery for UDP/raw applications is not
working in the presence of VRF when the socket is not bound to a device.
The problem is that ip6_sk_update_pmtu does not consider the L3 domain
of the skb device if the socket is not bound. Update the function to
set oif to the L3 master device if relevant.

Fixes: ca254490c8df ("net: Add VRF support to IPv6 stack")
Reported-by: Preethi Ramachandra <preethir@juniper.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/ipv6/route.c