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linux/drivers/net/ipvlan
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Jianguo Wu ecaa1bf506 ipvlan: Make skb->skb_iif track skb->dev for l3s mode 
[ Upstream commit 59a0b022aa ]

For l3s mode, skb->dev is set to ipvlan interface in ipvlan_nf_input():
  skb->dev = addr->master->dev
but, skb->skb_iif remain unchanged, this will cause socket lookup failed
if a target socket is bound to a interface, like the following example:

  ip link add ipvlan0 link eth0 type ipvlan mode l3s
  ip addr add dev ipvlan0 192.168.124.111/24
  ip link set ipvlan0 up

  ping -c 1 -I ipvlan0 8.8.8.8
  100% packet loss

This is because there is no match sk in __raw_v4_lookup() as sk->sk_bound_dev_if != dif(skb->skb_iif).
Fix this by make skb->skb_iif track skb->dev in ipvlan_nf_input().

Fixes: c675e06a98 ("ipvlan: decouple l3s mode dependencies from other modes")
Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/29865b1f-6db7-c07a-de89-949d3721ea30@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-03-22 13:31:24 +01:00
..
ipvlan.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ipvlan_core.c ipvlan: Fix out-of-bound bugs caused by unset skb->mac_header 2022-09-28 11:11:47 +02:00
ipvlan_l3s.c ipvlan: Make skb->skb_iif track skb->dev for l3s mode 2023-03-22 13:31:24 +01:00
ipvlan_main.c net: use eth_hw_addr_set() instead of ether_addr_copy() 2022-08-31 17:16:37 +02:00
ipvtap.c net: ipvtap - add __init/__exit annotations to module init/exit funcs 2022-08-31 17:16:40 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00