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

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Message-ID: <0000000000004754de061fbb1356@google.com>
Date: Thu, 15 Aug 2024 09:10:03 -0700
From: syzbot <syzbot+5ea2845f44caa77f5543@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, axboe@...nel.dk, borntraeger@...ux.ibm.com, 
	david@...hat.com, frankja@...ux.ibm.com, imbrenda@...ux.ibm.com, 
	io-uring@...r.kernel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-mm@...ck.org, pbonzini@...hat.com, 
	peterx@...hat.com, shuah@...nel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] WARNING in hpage_collapse_scan_pmd (2)

syzbot suspects this issue was fixed by commit:

commit c88033efe9a391e72ba6b5df4b01d6e628f4e734
Author: Peter Xu <peterx@...hat.com>
Date:   Mon Apr 22 13:33:11 2024 +0000

    mm/userfaultfd: reset ptes when close() for wr-protected ones

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12f2396b980000
start commit:   e67572cd2204 Linux 6.9-rc6
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=3310e643b6ef5d69
dashboard link: https://syzkaller.appspot.com/bug?extid=5ea2845f44caa77f5543
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10874a40980000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: mm/userfaultfd: reset ptes when close() for wr-protected ones

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