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| author | Florian Larysch <fl@n621.de> | 2017-04-03 16:46:09 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-06 12:18:56 -0700 |
| commit | a8801799c6975601fd58ae62f48964caec2eb83f (patch) | |
| tree | a5072ee506c70b384c280e9d60101e5afd62efb6 /net | |
| parent | 0e4c0ee580749502e25609b83082ac8d92c13023 (diff) | |
| download | linux-0-day-a8801799c6975601fd58ae62f48964caec2eb83f.tar.gz linux-0-day-a8801799c6975601fd58ae62f48964caec2eb83f.tar.xz | |
net: ipv4: fix multipath RTM_GETROUTE behavior when iif is given
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 8471dd1167714..acd69cfe2951e 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2620,7 +2620,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh) skb_reset_network_header(skb); /* Bugfix: need to give ip_route_input enough of an IP header to not gag. */ - ip_hdr(skb)->protocol = IPPROTO_ICMP; + ip_hdr(skb)->protocol = IPPROTO_UDP; skb_reserve(skb, MAX_HEADER + sizeof(struct iphdr)); src = tb[RTA_SRC] ? nla_get_in_addr(tb[RTA_SRC]) : 0; |