linux-kernel - Re: [syzbot] [mm?] BUG: Bad page map (8)

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Message-ID: <ZvqtIn-9PZRWkMDa@casper.infradead.org>
Date: Mon, 30 Sep 2024 14:52:34 +0100
From: Matthew Wilcox <willy@...radead.org>
To: syzbot <syzbot+ec4b7d82bb051330f15a@...kaller.appspotmail.com>
Cc: Liam.Howlett@...cle.com, akpm@...ux-foundation.org, david@...hat.com,
	hdanton@...a.com, hughd@...gle.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, lorenzo.stoakes@...cle.com,
	syzkaller-bugs@...glegroups.com, vbabka@...e.cz,
	vivek.kasireddy@...el.com
Subject: Re: [syzbot] [mm?] BUG: Bad page map (8)

On Sun, Sep 29, 2024 at 05:02:02PM -0700, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit f8d112a4e657c65c888e6b8a8435ef61a66e4ab8
> Author: Liam R. Howlett <Liam.Howlett@...cle.com>
> Date:   Fri Aug 30 04:00:54 2024 +0000
> 
>     mm/mmap: avoid zeroing vma tree in mmap_region()

This is almost certainly a bogus bisection.  See
https://lore.kernel.org/all/00000000000020f6f8061da86023@google.com/