linux-kernel - Re: WARNING in wp_page

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Date:   Tue, 17 Dec 2019 12:16:01 -0800
From:   syzbot <syzbot+9301f2f33873407d5b33@...kaller.appspotmail.com>
To:     andriin@...com, ast@...nel.org, bjorn.topel@...el.com,
        bpf@...r.kernel.org, catalin.marinas@....com, daniel@...earbox.net,
        davem@...emloft.net, hawk@...nel.org, jakub.kicinski@...ronome.com,
        john.fastabend@...il.com, jonathan.lemon@...il.com,
        justin.he@....com, kafai@...com, kirill.shutemov@...ux.intel.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        magnus.karlsson@...il.com, magnus.karlsson@...el.com,
        netdev@...r.kernel.org, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: WARNING in wp_page_copy

syzbot has bisected this bug to:

commit 83d116c53058d505ddef051e90ab27f57015b025
Author: Jia He <justin.he@....com>
Date:   Fri Oct 11 14:09:39 2019 +0000

     mm: fix double page fault on arm64 if PTE_AF is cleared

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1378f5b6e00000
start commit:   e31736d9 Merge tag 'nios2-v5.5-rc2' of git://git.kernel.or..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=10f8f5b6e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1778f5b6e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=79f79de2a27d3e3d
dashboard link: https://syzkaller.appspot.com/bug?extid=9301f2f33873407d5b33
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10fd9fb1e00000

Reported-by: syzbot+9301f2f33873407d5b33@...kaller.appspotmail.com
Fixes: 83d116c53058 ("mm: fix double page fault on arm64 if PTE_AF is  
cleared")

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