linux-kernel - Re: general protection fault in mas_empty_area

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Message-ID: <CAJg=8jzRT=oA9g6AGd1KmAY3GBkKkczj1rCqQ+pik5LmUQYd_A@mail.gmail.com>
Date: Mon, 22 Apr 2024 08:11:32 -0700
From: Marius Fleischer <fleischermarius@...il.com>
To: "Liam R. Howlett" <Liam.Howlett@...cle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, maple-tree@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, syzkaller@...glegroups.com, 
	harrisonmichaelgreen@...il.com
Subject: Re: general protection fault in mas_empty_area_rev

Hi Liam,

Thank you so much for the response!

> >
> > Crash log:
> >
> > general protection fault, probably for non-canonical address
> > 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
> >
> > KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> >
> > CPU: 0 PID: 79545 Comm: syz-executor.0 Not tainted 6.9.0-rc4-dirty #3
>
> This indicates that you built with your own patches.  Could you test an
> unmodified 6.9.0-rc4 with your setup?
>

I'm very sorry for this oversight. I had applied the patches for another bug
from this conversation
(https://lore.kernel.org/all/20240404070702.2744-3-osalvador@suse.de/T/#m480f21ab850996395082d0faab7f624f45b83781)
I will test the reproducer without these patches and get back to you!

If there is any other information I can provide to help you, please let me know!

Wishing you a lovely start to the week!

Best,
Marius