netfilter: xt_TEE: fix wrong interface selection

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TEE netdevice notifier handler checks only interface name. however
each netns can have same interface name. hence other netns's interface
could be selected.

test commands:
   %ip netns add vm1
   %iptables -I INPUT -p icmp -j TEE --gateway 192.168.1.1 --oif enp2s0
   %ip link set enp2s0 netns vm1

Above rule is in the root netns. but that rule could get enp2s0
ifindex of vm1 by notifier handler.

After this patch, TEE rule is added to the per-netns list.

Fixes: 9e2f6c5d78 ("netfilter: Rework xt_TEE netdevice notifier")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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Taehee Yoo 2018-10-07 00:09:18 +09:00 • committed by Pablo Neira Ayuso

parent 4a3e71b7b7

commit f24d2d4f95

1 changed files with 52 additions and 17 deletions

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net/netfilter/xt_TEE.c

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