Skip to content
Snippets Groups Projects
Unverified Commit 97b9fcc9 authored by David Bauer's avatar David Bauer Committed by GitHub
Browse files

net vxlan: don't learn non-unicast L2 destinations (#3192)

parent 47eaf9e8
No related branches found
Tags experimental-2024-03-29-base
Loading
From: David Bauer <mail@david-bauer.net>
Date: Sat, 17 Feb 2024 22:37:05 +0100
Subject: net vxlan: don't learn non-unicast L2 destinations
See Gluon #3191
Link: https://github.com/freifunk-gluon/gluon/issues/3191
Signed-off-by: David Bauer <mail@david-bauer.net>
diff --git a/target/linux/generic/hack-5.15/999-net-vxlan-don-t-learn-non-unicast-L2-destinations.patch b/target/linux/generic/hack-5.15/999-net-vxlan-don-t-learn-non-unicast-L2-destinations.patch
new file mode 100644
index 0000000000000000000000000000000000000000..0be8783287b32c33ec76e19b8407397f8f0fe5f3
--- /dev/null
+++ b/target/linux/generic/hack-5.15/999-net-vxlan-don-t-learn-non-unicast-L2-destinations.patch
@@ -0,0 +1,32 @@
+From 3f1a227cb071f65f6ecc4db9f399649869735a7c Mon Sep 17 00:00:00 2001
+From: David Bauer <mail@david-bauer.net>
+Date: Sat, 17 Feb 2024 22:34:59 +0100
+Subject: [PATCH] net vxlan: don't learn non-unicast L2 destinations
+
+See Gluon #3191
+
+Link: https://github.com/freifunk-gluon/gluon/issues/3191
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+---
+ drivers/net/vxlan.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
+index 141635a35c28..253a741d6c36 100644
+--- a/drivers/net/vxlan/vxlan_core.c
++++ b/drivers/net/vxlan/vxlan_core.c
+@@ -1467,6 +1467,10 @@ static bool vxlan_snoop(struct net_device *dev,
+ struct vxlan_fdb *f;
+ u32 ifindex = 0;
+
++ /* Don't learn broadcast packets (Gluon #3191) */
++ if (is_multicast_ether_addr(src_mac) || is_zero_ether_addr(src_mac))
++ return false;
++
+ #if IS_ENABLED(CONFIG_IPV6)
+ if (src_ip->sa.sa_family == AF_INET6 &&
+ (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL))
+--
+2.43.0
+
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment