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| author | Felix Fietkau <nbd@nbd.name> | 2018-01-19 11:50:46 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2018-03-03 15:52:27 +0000 |
| commit | d01262f521931bc5c1cb2078c5136ab45b2226df (patch) | |
| tree | 6618ee2b4c90d973434f9dbd2dfac419733cfac1 /net | |
| parent | d3c38df3171bdb31d9ef24dadc855c8b40370f29 (diff) | |
| download | linux-stable-d01262f521931bc5c1cb2078c5136ab45b2226df.tar.gz linux-stable-d01262f521931bc5c1cb2078c5136ab45b2226df.tar.bz2 linux-stable-d01262f521931bc5c1cb2078c5136ab45b2226df.zip | |
net: igmp: fix source address check for IGMPv3 reports
commit ad23b750933ea7bf962678972a286c78a8fa36aa upstream.
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: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/igmp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 62705267000d..387c5e404650 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -334,7 +334,7 @@ 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); |