linux-kernel - Re: selftests: memfd: run_hugetlbfs_test.sh - invalid opcode: 0000 [#1] PREEMPT SMP

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Date:   Fri, 3 Feb 2023 12:30:06 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     Anders Roxell <anders.roxell@...aro.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-stable <stable@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, Jeff Xu <jeffxu@...gle.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Pranith Kumar <bobby.prani@...il.com>,
        David Herrmann <dh.herrmann@...il.com>
Subject: Re: selftests: memfd: run_hugetlbfs_test.sh - invalid opcode: 0000
 [#1] PREEMPT SMP

On Fri, 3 Feb 2023 at 03:24, Mike Kravetz <mike.kravetz@...cle.com> wrote:
>
> On 02/02/23 16:29, Anders Roxell wrote:
> > On Thu, 2 Feb 2023 at 15:54, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
> > >
> > > Hi Mike,
> > >
> > > On Wed, 25 Jan 2023 at 06:04, Mike Kravetz <mike.kravetz@...cle.com> wrote:
> > > >
> > > > On 01/05/23 15:14, Naresh Kamboju wrote:
> > > > > While running selftests: memfd: run_hugetlbfs_test.sh on qemu_i386 and i386 the
> > > > > following invalid opcode was noticed on stable-rc 6.1 and  6.0.
> > > > >
> > > > > This is always reproducible on stable-rc 6.1 and  6.0 with qemu_i386 and i386.
> > > > > Build, config and test log details provided in the below links [1].
> > > >
> > > > Hello Naresh,
> > > >
> > > > I have tried to create this issue a few times without success.  Since I
> > > > do not have i386 HW, I am using qemu_i386.  If I use the supplied config,
> > > > my kernel does not boot.  I then try to modify config options which I
> > > > think are not relevant.  By the time I get to a config that will boot, I
> > > > can not recreate the issue. :(
> > > >
> > > > Just curious if you have any suggestions?  Or, Wondering if anyone else has
> > > > suggestions on how to proceed?
> > >
> > > Please install tuxmake and run attached script to reproduce reported issues,
> > > $ pip3 install tuxmake
> >
> > oops, a typo, should be 'tuxrun' not 'tuxmake'.
> >
> > https://tuxrun.org/
> >
> > Cheers,
> > Anders
> >
> > > $ ./memfd-crash-test-qemu-i386.sh
> > >
> > > This script downloads kernel Image and rootfs and runs run_hugetlbfs_test.sh.
> > > If you have any questions please get back to me.
> > > For your reference I have attached logs.txt
>
> Sorry, I am still a bit confused.
>
> Was the intention to attach the script 'memfd-crash-test-qemu-i386.sh'?

Might be due to the emailer not allowing scripts files upload / download.

> The only attachment I have seen is 'logs.txt' which is the output of the run.

I have sent you a private email with a reproducer script.

> --
> Mike Kravetz