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

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Date:   Sat,  8 Apr 2023 22:00:28 +0800
From:   Ding Hui <dinghui@...gfor.com.cn>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, intel-wired-lan@...ts.osuosl.org
Cc:     jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        keescook@...omium.org, grzegorzx.szczurek@...el.com,
        mateusz.palczewski@...el.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        Ding Hui <dinghui@...gfor.com.cn>
Subject: [PATCH net 0/2] iavf: Fix issues when setting channels concurrency

There are two issues can be reproduced by the following script:

[root@...t ~]# cat test-iavf-1.sh
#!/bin/bash

pf_dbsf="0000:40:01.1/0000:41:00.0"
vf0_dbsf="0000:40:01.1/0000:41:02.0"
g_pids=()

function do_set_numvf()
{
    echo "set 2 vfs"
    echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs
    sleep $((RANDOM%3+1))
    echo "set 0 vfs"
    echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs
    sleep $((RANDOM%3+1))
}

function do_nic_reset()
{
    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
    echo "set $nic 1 combined"
    ethtool -L $nic combined 1
    echo "set $nic 4 combined"
    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+=($!)
while :; do do_nic_reset ; done &
g_pids+=($!)

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