linux-hardening - Re: [PATCH net v5 0/2] iavf: Fix issues when setting channels concurrency with removing

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Message-ID: <ZFuLB7QwaWMzfY6F@localhost.localdomain>
Date:   Wed, 10 May 2023 14:16:07 +0200
From:   Michal Kubiak <michal.kubiak@...el.com>
To:     Ding Hui <dinghui@...gfor.com.cn>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <intel-wired-lan@...ts.osuosl.org>,
        <jesse.brandeburg@...el.com>, <anthony.l.nguyen@...el.com>,
        <keescook@...omium.org>, <grzegorzx.szczurek@...el.com>,
        <mateusz.palczewski@...el.com>, <mitch.a.williams@...el.com>,
        <gregory.v.rose@...el.com>, <jeffrey.t.kirsher@...el.com>,
        <simon.horman@...igine.com>, <madhu.chittim@...el.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-hardening@...r.kernel.org>, <pengdonglin@...gfor.com.cn>,
        <huangcun@...gfor.com.cn>
Subject: Re: [PATCH net v5 0/2] iavf: Fix issues when setting channels
 concurrency with removing

On Tue, May 09, 2023 at 07:11:46PM +0800, Ding Hui wrote:
> The patchset fix two issues which can be reproduced by the following script:
> 
> [root@...t ~]# cat repro.sh
> #!/bin/bash
> 
> pf_dbsf="0000:41:00.0"
> vf0_dbsf="0000:41:02.0"
> g_pids=()
> 
> function do_set_numvf()
> {
>     echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs
>     sleep $((RANDOM%3+1))
>     echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs
>     sleep $((RANDOM%3+1))
> }
> 
> function do_set_channel()
> {
>     local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)
>     [ -z "$nic" ] && { sleep $((RANDOM%3)) ; return 1; }
>     ifconfig $nic 192.168.18.5 netmask 255.255.255.0
>     ifconfig $nic up
>     ethtool -L $nic combined 1
>     ethtool -L $nic combined 4
>     sleep $((RANDOM%3))
> }
> 
> function on_exit()
> {
>     local pid
>     for pid in "${g_pids[@]}"; do
>         kill -0 "$pid" &>/dev/null && kill "$pid" &>/dev/null
>     done
>     g_pids=()
> }
> 
> trap "on_exit; exit" EXIT
> 
> while :; do do_set_numvf ; done &
> g_pids+=($!)
> while :; do do_set_channel ; done &
> g_pids+=($!)
> 
> wait
> 
> 
> Ding Hui (2):
>   iavf: Fix use-after-free in free_netdev
>   iavf: Fix out-of-bounds when setting channels on remove
> 
>  drivers/net/ethernet/intel/iavf/iavf_ethtool.c | 4 +++-
>  drivers/net/ethernet/intel/iavf/iavf_main.c    | 6 +-----
>  2 files changed, 4 insertions(+), 6 deletions(-)
> 
> -- 
> 2.17.1
> 

For the series:
Reviewed-by: Michal Kubiak <michal.kubiak@...el.com>

Thanks,
Michal