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Sender: Guenter Roeck <groeck7@gmail.com>
Subject: Re: [PATCH 4.14 00/14] 4.14.230-rc1 review
To:     Naresh Kamboju <naresh.kamboju@linaro.org>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        open list <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Shuah Khan <shuah@kernel.org>, patches@kernelci.org,
        lkft-triage@lists.linaro.org, Pavel Machek <pavel@denx.de>,
        Jon Hunter <jonathanh@nvidia.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        linux-stable <stable@vger.kernel.org>
References: <20210409095300.391558233@linuxfoundation.org>
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 <CA+G9fYuB5wgnoa4Q7Ag5XW+HSKeXKRFOtScQ3m6OZGLEnBs0dQ@mail.gmail.com>
From:   Guenter Roeck <linux@roeck-us.net>
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Message-ID: <a7421119-3e6d-bdb9-5fba-eef3c9b89b43@roeck-us.net>
Date:   Sat, 10 Apr 2021 08:46:07 -0700
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On 4/10/21 2:21 AM, Naresh Kamboju wrote:
> On Sat, 10 Apr 2021 at 01:43, Guenter Roeck <linux@roeck-us.net> wrote:
>>
>> On Fri, Apr 09, 2021 at 11:53:25AM +0200, Greg Kroah-Hartman wrote:
>>> This is the start of the stable review cycle for the 4.14.230 release.
>>> There are 14 patches in this series, all will be posted as a response
>>> to this one.  If anyone has any issues with these being applied, please
>>> let me know.
>>>
>>> Responses should be made by Sun, 11 Apr 2021 09:52:52 +0000.
>>> Anything received after that time might be too late.
>>>
>>
>> Build results:
>>         total: 168 pass: 168 fail: 0
>> Qemu test results:
>>         total: 408 pass: 408 fail: 0
>>
>> Tested-by: Guenter Roeck <linux@roeck-us.net>
>>
>> Having said this, I did see a spurious crash, and I see an unusual warning.
>> I have seen the crash only once, but the warning happens with every boot.
>> These are likely not new but exposed because I added network interface
>> tests. This is all v4.14.y specific; I did not see it in other branches.
>> See below for the tracebacks. Maybe someone has seen it before.
> 
> I do not notice these warnings.
> Please share the testing environment / device / setup / network interfaces
> and Kernel configs and steps to reproduce.
> 
>  - Naresh
> 

Hi Naresh,

the configuration is based on aspeed_g5_defconfig (see attached configuration file)
and the following qemu command line (qemu v5.2):

qemu-system-arm -M romulus-bmc -kernel \
	arch/arm/boot/zImage -no-reboot \
	-initrd rootfs-armv5.cpio -nic user -nodefaults \
	--append "panic=-1 slub_debug=FZPUA rdinit=/sbin/init console=ttyS4,115200 earlycon=uart8250,mmio32,0x1e784000,115200n8" \
	-dtb arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
	-nographic -monitor null -serial stdio

It also happens with other bmc platforms using the same network interface, though
it is for some reason more prevalent on romulus-bmc.

The root file system is generated with buildroot. See buildone.sh / buildall.sh
in branch local-2021.02 of git@github.com:groeck/buildroot.git. The warning happens
with almost every boot; the crash in maybe one of 5-10 boots. The test, if you want
to call it that, uses udhcpc to get an IP address and then

net_test_successful=0
ifconfig eth0 2>/dev/null | grep -q "inet addr:10.0.2.15"
if [ $? -eq 0 ]; then
    ping -q -c 1 -s 1000 -W 1 -I eth0 10.0.2.2 >/dev/null
    if [ $? -eq 0 ]; then
	telnet 10.0.2.2:22 </dev/null >/dev/null 2>dev/null
	if [ $? -eq 0 ]; then
	    net_test_successful=1
	fi
    fi
fi

See package/busybox/run.sh in the above repository/branch.

Guenter

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