linux-kernel - Re: KASAN: null-ptr-deref Write in xlog_cil

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Message-ID: <CAJg=8jw=D5kVL6ETwm5EMias4rgUKfEg2H9dLUgesqf1wq7evw@mail.gmail.com>
Date: Thu, 25 Apr 2024 13:33:51 -0700
From: Marius Fleischer <fleischermarius@...il.com>
To: Leah Rumancik <leah.rumancik@...il.com>
Cc: "Darrick J. Wong" <djwong@...nel.org>, Dave Chinner <david@...morbit.com>, linux-xfs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, harrisonmichaelgreen@...il.com, 
	syzkaller@...glegroups.com
Subject: Re: KASAN: null-ptr-deref Write in xlog_cil_commit

Hi Leah,

Thanks for your response!

I can reliably reproduce the issue, so I'll try to create a patch and
let you know.

Wishing you a lovely day!

Best,
Marius

On Thu, 25 Apr 2024 at 13:31, Leah Rumancik <leah.rumancik@...il.com> wrote:
>
> Hi Marius,
>
> Thanks for the bug report. If you can reliably reproduce this issue
> and can provide a patch which fixes it, I can add that patch to the
> next set of 5.15 backports. I am a bit limited for time at the moment
> though and trying to work on the backlog of backports into 6.1.y as
> well, so I am not sure what the exact timeline would look for a 5.15.y
> set yet.
>
> - Leah
>
>
> On Tue, Apr 23, 2024 at 8:42 PM Darrick J. Wong <djwong@...nel.org> wrote:
> >
> > On Tue, Apr 23, 2024 at 08:05:22AM -0700, Marius Fleischer wrote:
> > > Hi Dave,
> > >
> > > Thank you so much for your detailed explanations!
> > >
> > > > > Do you think it would make sense to backport that patch to 5.15.156 (the
> > > > > LTS kernel)?
> > > >
> > > > That's up to the 5.15 LTS maintainers to decide. They also need to
> > > > weigh up the fact that xlog_cil_kvmalloc() doesn't exist anymore in
> > > > the upstream code base. i.e. we found other places that had the same
> > > > kvmalloc() performance problems, and so lifted that code up further
> > > > and used it in other places in XFS....
> > > >
> > >
> > > Understood. Please allow me one last follow-up question. Did I add the correct
> > > maintainers/mailing lists to reach the 5.15 LTS maintainers? If not,
> > > how do I find
> > > the correct addresses? I used scripts/get_maintainer.pl as suggested here
> > > (https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html)
> > > to locate maintainers/mailing lists.
> >
> > You got it correct -- Leah is the 5.15 maintainer of record.
> >
> > --D
> >
> > > Wishing you a lovely week!
> > >
> > > Best,
> > > Marius