Re: [PATCHv3 net] net: sched: set xt_tgchk_param par.net properly in ipt_init_target

[David Miller <davem@davemloft.net>]

From: Xin Long <lucien.xin@gmail.com>
Date: Tue,  8 Aug 2017 15:25:25 +0800

> Now xt_tgchk_param par in ipt_init_target is a local varibale,
> par.net is not initialized there. Later when xt_check_target
> calls target's checkentry in which it may access par.net, it
> would cause kernel panic.
> 
> Jaroslav found this panic when running:
> 
>   # ip link add TestIface type dummy
>   # tc qd add dev TestIface ingress handle ffff:
>   # tc filter add dev TestIface parent ffff: u32 match u32 0 0 \
>     action xt -j CONNMARK --set-mark 4
> 
> This patch is to pass net param into ipt_init_target and set
> par.net with it properly in there.
> 
> v1->v2:
>   As Wang Cong pointed, I missed ipt_net_id != xt_net_id, so fix
>   it by also passing net_id to __tcf_ipt_init.
> v2->v3:
>   Missed the fixes tag, so add it.
> 
> Fixes: ecb2421b5ddf ("netfilter: add and use nf_ct_netns_get/put")
> Reported-by: Jaroslav Aster <jaster@redhat.com>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

Applied and queued up for -stable, thanks.