linux-ext4 - Re: [Bug 216529] New: [fstests generic/048] BUG: Kernel NULL pointer dereference at 0x00000069, filemap_release

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Message-ID: <20220927181049.jpk3b52ssmq326b5@riteshh-domain>
Date:   Tue, 27 Sep 2022 23:40:49 +0530
From:   "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
To:     Theodore Ts'o <tytso@....edu>
Cc:     bugzilla-daemon@...nel.org, linux-ext4@...r.kernel.org
Subject: Re: [Bug 216529] New: [fstests generic/048] BUG: Kernel NULL pointer
 dereference at 0x00000069, filemap_release_folio+0x88/0xb0

On 22/09/26 01:02AM, Theodore Ts'o wrote:
> On Sun, Sep 25, 2022 at 11:55:29AM +0000, bugzilla-daemon@...nel.org wrote:
> > https://bugzilla.kernel.org/show_bug.cgi?id=216529
> >
> >
> > Hit a panic on ppc64le, by running generic/048 with 1k block size:
>
> Hmm, does this reproduce reliably for you?  I test with a 1k block
> size on x86_64 as a proxy 4k block sizes on PPC64, where the blocksize
> < pagesize... and this isn't reproducing for me on x86, and I don't
> have access to a PPC64LE system.
>
> Ritesh, is this something you can take a look at it?  Thanks!

I was away for some personal work for last few days, but I am back to work from
today. Sure, I will take a look at this and will get back.

I did give this test a couple of runs though, but wasn't able to reproduce it.
But let me try few more things along with more iterations. Will update
accordingly.

-ritesh