linux-kernel - Re: general protection fault in khugepaged

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 17 Jul 2020 15:40:04 -0700
From:   syzbot <syzbot+ed318e8b790ca72c5ad0@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, kirill.shutemov@...ux.intel.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        torvalds@...ux-foundation.org, william.kucharski@...cle.com,
        yang.shi@...ux.alibaba.com, ziy@...dia.com
Subject: Re: general protection fault in khugepaged

syzbot has bisected this issue to:

commit ffe945e633b527d5a4577b42cbadec3c7cbcf096
Author: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Date:   Wed Jun 3 23:00:09 2020 +0000

    khugepaged: do not stop collapse if less than half PTEs are referenced

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17356c2f100000
start commit:   e44f65fd xen-netfront: remove redundant assignment to vari..
git tree:       net-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=14b56c2f100000
console output: https://syzkaller.appspot.com/x/log.txt?x=10b56c2f100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=829871134ca5e230
dashboard link: https://syzkaller.appspot.com/bug?extid=ed318e8b790ca72c5ad0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=113406a7100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=175597d3100000

Reported-by: syzbot+ed318e8b790ca72c5ad0@...kaller.appspotmail.com
Fixes: ffe945e633b5 ("khugepaged: do not stop collapse if less than half PTEs are referenced")

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