linux-kernel - Re: [syzbot] [mm?] WARNING in try_to_migrate

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Message-ID: <6898b19b.050a0220.7f033.00cf.GAE@google.com>
Date: Sun, 10 Aug 2025 07:50:03 -0700
From: syzbot <syzbot+63859a31071a369082b1@...kaller.appspotmail.com>
To: Liam.Howlett@...cle.com, akpm@...ux-foundation.org, david@...hat.com, 
	dev.jain@....com, harry.yoo@...cle.com, hdanton@...a.com, 
	liam.howlett@...cle.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	lorenzo.stoakes@...cle.com, riel@...riel.com, syzkaller-bugs@...glegroups.com, 
	vbabka@...e.cz, ziy@...dia.com
Subject: Re: [syzbot] [mm?] WARNING in try_to_migrate_one (3)

syzbot has bisected this issue to:

commit cac1db8c3aad97d6ffb56ced8868d6cbbbd2bfbe
Author: Dev Jain <dev.jain@....com>
Date:   Fri Jul 18 09:02:43 2025 +0000

    mm: optimize mprotect() by PTE batching

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12ac8842580000
start commit:   0227b49b5027 Merge tag 'gpio-updates-for-v6.17-rc1-part2' ..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11ac8842580000
console output: https://syzkaller.appspot.com/x/log.txt?x=16ac8842580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2ae1da3a7f4a6ba4
dashboard link: https://syzkaller.appspot.com/bug?extid=63859a31071a369082b1
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=117c72f0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17ab7ea2580000

Reported-by: syzbot+63859a31071a369082b1@...kaller.appspotmail.com
Fixes: cac1db8c3aad ("mm: optimize mprotect() by PTE batching")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection