This is a note to let you know that I've just added the patch titled
net: igmp: fix source address check for IGMPv3 reports
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-igmp-fix-source-address-check-for-igmpv3-reports.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Jan 29 11:15:06 CET 2018
From: Felix Fietkau <nbd@xxxxxxxx>
Date: Fri, 19 Jan 2018 11:50:46 +0100
Subject: net: igmp: fix source address check for IGMPv3 reports
From: Felix Fietkau <nbd@xxxxxxxx>
[ 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@xxxxxxxxxxxx>
Fixes: a46182b00290 ("net: igmp: Use correct source address on IGMPv3 reports")
Reported-by: Sebastian Gottschall <s.gottschall@xxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/igmp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -329,7 +329,7 @@ static __be32 igmpv3_get_srcaddr(struct
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);
Patches currently in stable-queue which might be from nbd@xxxxxxxx are
queue-3.18/net-igmp-fix-source-address-check-for-igmpv3-reports.patch