generic: copy backport, hack, pending patch and config from 6.1 to 6.6

Copy backport, hack, pending patch and config from 6.1 to 6.6.

Signed-off-by: Weijie Gao <hackpascal@gmail.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/target/linux/generic/pending-6.6/151-net-bridge-do-not-send-arp-replies-if-src-and-target.patch b/target/linux/generic/pending-6.6/151-net-bridge-do-not-send-arp-replies-if-src-and-target.patch
new file mode 100644
index 0000000000..f420d210c2
--- /dev/null
+++ b/target/linux/generic/pending-6.6/151-net-bridge-do-not-send-arp-replies-if-src-and-target.patch
@@ -0,0 +1,37 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 4 Jan 2024 15:21:21 +0100
+Subject: [PATCH] net: bridge: do not send arp replies if src and target hw
+ addr is the same
+
+There are broken devices in the wild that handle duplicate IP address
+detection by sending out ARP requests for the IP that they received from a
+DHCP server and refuse the address if they get a reply.
+When proxyarp is enabled, they would go into a loop of requesting an address
+and then NAKing it again.
+
+Link: https://github.com/openwrt/openwrt/issues/14309
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/bridge/br_arp_nd_proxy.c
++++ b/net/bridge/br_arp_nd_proxy.c
+@@ -204,7 +204,10 @@ void br_do_proxy_suppress_arp(struct sk_
+ 			if ((p && (p->flags & BR_PROXYARP)) ||
+ 			    (f->dst && (f->dst->flags & (BR_PROXYARP_WIFI |
+ 							 BR_NEIGH_SUPPRESS)))) {
+-				if (!vid)
++				replied = true;
++				if (!memcmp(n->ha, sha, dev->addr_len))
++					replied = false;
++				else if (!vid)
+ 					br_arp_send(br, p, skb->dev, sip, tip,
+ 						    sha, n->ha, sha, 0, 0);
+ 				else
+@@ -212,7 +215,6 @@ void br_do_proxy_suppress_arp(struct sk_
+ 						    sha, n->ha, sha,
+ 						    skb->vlan_proto,
+ 						    skb_vlan_tag_get(skb));
+-				replied = true;
+ 			}
+ 
+ 			/* If we have replied or as long as we know the