linux-ext4 - Re: [Bug report] BUG: Kernel NULL pointer dereference at 0x00000069, filemap_release

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Message-ID: <87bkqqplpc.fsf@mpe.ellerman.id.au>
Date:   Wed, 05 Oct 2022 22:13:35 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Zorro Lang <zlang@...nel.org>, linux-mm@...ck.org,
        linux-ext4@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [Bug report] BUG: Kernel NULL pointer dereference at
 0x00000069, filemap_release_folio+0x88/0xb0

Matthew Wilcox <willy@...radead.org> writes:
> On Fri, Sep 30, 2022 at 12:01:26PM +1000, Michael Ellerman wrote:
>> Matthew Wilcox <willy@...radead.org> writes:
>> >> [ 4681.238745] Instruction dump: 
>> >> [ 4681.238749] fbc1fff0 f821ffc1 7c7d1b78 7c9c2378 ebc30028 7fdff378 48000018 60000000  
>> >> [ 4681.238765] 60000000 ebff0008 7c3ef840 41820048 <815f0060> e93f0000 5529077c 7d295378  
>> >
>> > Running that through scripts/decodecode (with some minor hacks .. how
>> > do PPC people do this properly?)
>> 
>> We've just always used our own scripts. Mine is here: https://github.com/mpe/misc-scripts/blob/master/ppc/ppc-disasm
>> 
>> I've added an issue to our tracker for us to get scripts/decodecode
>> working on our oopses (eventually).
>
> Would you be open to changing your oops printer to do
> s/Instruction dump/Code/ ?  That would make it work without any other
> changes.

Yeah, we're the only arch that uses "Instruction dump".
For userspace instructions we already print "code".

I'll send a patch switching to "Code:".

cheers