[PATCH 5.15 092/667] ipv6: Dont send rs packets to the interface of ARPHRD_TUNNEL
From: Greg Kroah-Hartman
Date: Tue Jun 07 2022 - 14:27:36 EST
From: jianghaoran <jianghaoran@xxxxxxxxxx>
[ Upstream commit b52e1cce31ca721e937d517411179f9196ee6135 ]
ARPHRD_TUNNEL interface can't process rs packets
and will generate TX errors
ex:
ip tunnel add ethn mode ipip local 192.168.1.1 remote 192.168.1.2
ifconfig ethn x.x.x.x
ethn: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1480
inet x.x.x.x netmask 255.255.255.255 destination x.x.x.x
inet6 fe80::5efe:ac1e:3cdb prefixlen 64 scopeid 0x20<link>
tunnel txqueuelen 1000 (IPIP Tunnel)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 3 dropped 0 overruns 0 carrier 0 collisions 0
Signed-off-by: jianghaoran <jianghaoran@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220429053802.246681-1-jianghaoran@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/ipv6/addrconf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1ba5ff21412c..07b868c002a3 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4219,7 +4219,8 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id,
send_rs = send_mld &&
ipv6_accept_ra(ifp->idev) &&
ifp->idev->cnf.rtr_solicits != 0 &&
- (dev->flags&IFF_LOOPBACK) == 0;
+ (dev->flags & IFF_LOOPBACK) == 0 &&
+ (dev->type != ARPHRD_TUNNEL);
read_unlock_bh(&ifp->idev->lock);
/* While dad is in progress mld report's source address is in6_addrany.
--
2.35.1