From: Felix Fietkau nbd@nbd.name
This patch has been added to the 4.1 stable tree. If you have any objections, please let us know.
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[ Upstream commit ad23b750933ea7bf962678972a286c78a8fa36aa ]
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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- net/ipv4/igmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 0e9d61bf8685..7d8121acac74 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -330,7 +330,7 @@ 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);