Re: [syzbot] [mm?] WARNING in hpage_collapse_scan_pmd (2)

Re: [syzbot] [mm?] WARNING in hpage_collapse_scan_pmd (2)

[syzbot]

syzbot has bisected this issue to:

commit ef5b6a542b1dbb718226a5f8208be09ef405983d
Author: Paolo Bonzini <pbonzini@redhat.com>
Date:   Wed Nov 8 09:40:35 2023 +0000

    selftests: kvm/s390x: use vm_create_barebones()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14071cd3980000
start commit:   e67572cd2204 Linux 6.9-rc6
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16071cd3980000
console output: https://syzkaller.appspot.com/x/log.txt?x=12071cd3980000
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

Reported-by: syzbot+5ea2845f44caa77f5543@syzkaller.appspotmail.com
Fixes: ef5b6a542b1d ("selftests: kvm/s390x: use vm_create_barebones()")

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

Re: [syzbot] [mm?] WARNING in hpage_collapse_scan_pmd (2)

[syzbot]

syzbot suspects this issue was fixed by commit:

commit c88033efe9a391e72ba6b5df4b01d6e628f4e734
Author: Peter Xu <peterx@redhat.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