net: ipv4: fix multipath RTM_GETROUTE behavior when iif is given

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[ Upstream commit a8801799c6 ]

inet_rtm_getroute synthesizes a skeletal ICMP skb, which is passed to
ip_route_input when iif is given. If a multipath route is present for
the designated destination, ip_multipath_icmp_hash ends up being called,
which uses the source/destination addresses within the skb to calculate
a hash. However, those are not set in the synthetic skb, causing it to
return an arbitrary and incorrect result.

Instead, use UDP, which gets no such special treatment.

Signed-off-by: Florian Larysch <fl@n621.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Florian Larysch 2017-04-03 16:46:09 +02:00 • committed by Greg Kroah-Hartman

parent 425cc775d1

commit dbaaa5890d

1 changed files with 1 additions and 1 deletions

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net/ipv4/route.c

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