linux-kernel - Re: [syzbot] WARNING in change_pte

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Message-ID: <Y0Cp7uHwq4yWMiDN@xz-m1.local>
Date:   Fri, 7 Oct 2022 18:36:30 -0400
From:   Peter Xu <peterx@...hat.com>
To:     syzbot <syzbot+2c2bb573a9524a95e787@...kaller.appspotmail.com>
Cc:     akpm@...ux-foundation.org, david@...hat.com, jack@...e.cz,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, namit@...are.com, rppt@...nel.org,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] WARNING in change_pte_range

On Fri, Oct 07, 2022 at 03:08:22PM -0700, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit b1f9e876862d8f7176299ec4fb2108bc1045cbc8
> Author: Peter Xu <peterx@...hat.com>
> Date:   Fri May 13 03:22:56 2022 +0000
> 
>     mm/uffd: enable write protection for shmem & hugetlbfs
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=108e8fb8880000
> start commit:   511cce163b75 Merge tag 'net-6.0-rc8' of git://git.kernel.o..
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=128e8fb8880000
> console output: https://syzkaller.appspot.com/x/log.txt?x=148e8fb8880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=4520785fccee9b40
> dashboard link: https://syzkaller.appspot.com/bug?extid=2c2bb573a9524a95e787
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14ecac35080000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15668b38880000
> 
> Reported-by: syzbot+2c2bb573a9524a95e787@...kaller.appspotmail.com
> Fixes: b1f9e876862d ("mm/uffd: enable write protection for shmem & hugetlbfs")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> 

#syz dup: WARNING in change_protection

-- 
Peter Xu