path: root/net/ipv4/igmp.c
diff options
authorFelix Fietkau <nbd@nbd.name>2018-01-19 11:50:46 +0100
committerDavid S. Miller <davem@davemloft.net>2018-01-22 16:16:05 -0500
commitad23b750933ea7bf962678972a286c78a8fa36aa (patch)
tree706e8d1d63144e2266cb3e04ab0f187fe55f6eb0 /net/ipv4/igmp.c
parentgso: validate gso_type in GSO handlers (diff)
net: igmp: fix source address check for IGMPv3 reports
Commit "net: igmp: Use correct source address on IGMPv3 reports" introduced a check to validate the source address of locally generated IGMPv3 packets. Instead of checking the local interface address directly, it uses inet_ifa_match(fl4->saddr, ifa), which checks if the address is on the local subnet (or equal to the point-to-point address if used). This breaks for point-to-point interfaces, so check against ifa->ifa_local directly. Cc: Kevin Cernekee <cernekee@chromium.org> Fixes: a46182b00290 ("net: igmp: Use correct source address on IGMPv3 reports") Reported-by: Sebastian Gottschall <s.gottschall@dd-wrt.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/igmp.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 726f6b608274..2d49717a7421 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -332,7 +332,7 @@ static __be32 igmpv3_get_srcaddr(struct net_device *dev,
return htonl(INADDR_ANY);
for_ifa(in_dev) {
- if (inet_ifa_match(fl4->saddr, ifa))
+ if (fl4->saddr == ifa->ifa_local)
return fl4->saddr;
} endfor_ifa(in_dev);