linux-kernel - Re: KASAN: null-ptr-deref Write in start

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]

Message-ID: <CAL3q7H63XwdxmHgTRZthh6xYtg1uyqAK3apbrwxobRQ660U+JA@mail.gmail.com>
Date:   Fri, 8 Jan 2021 14:22:00 +0000
From:   Filipe Manana <fdmanana@...il.com>
To:     syzbot <syzbot+6700bca07dff187809c4@...kaller.appspotmail.com>
Cc:     Chris Mason <clm@...com>, David Sterba <dsterba@...e.com>,
        Filipe David Borba Manana <fdmanana@...e.com>,
        Josef Bacik <josef@...icpanda.com>,
        linux-btrfs <linux-btrfs@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        mingo@...nel.org, mingo@...hat.com, peterz@...radead.org,
        rostedt@...dmis.org, syzkaller-bugs@...glegroups.com,
        will@...nel.org
Subject: Re: KASAN: null-ptr-deref Write in start_transaction

On Thu, Jan 7, 2021 at 1:13 PM syzbot
<syzbot+6700bca07dff187809c4@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit f30bed83426c5cb9fce6cabb3f7cc5a9d5428fcc
> Author: Filipe Manana <fdmanana@...e.com>
> Date:   Fri Nov 13 11:24:17 2020 +0000
>
>     btrfs: remove unnecessary attempt to drop extent maps after adding inline extent
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13ddc30b500000
> start commit:   521b619a Merge tag 'linux-kselftest-kunit-fixes-5.10-rc3' ..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=61033507391c77ff
> dashboard link: https://syzkaller.appspot.com/bug?extid=6700bca07dff187809c4
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14a07ab2500000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10fe69c6500000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: btrfs: remove unnecessary attempt to drop extent maps after adding inline extent

Nop, it can't be this change.

What should fix it should be the following commit:

commit ecfdc08b8cc65d737eebc26a1ee1875a097fd6a0
Author: Goldwyn Rodrigues <rgoldwyn@...e.com>
Date:   Thu Sep 24 11:39:21 2020 -0500

    btrfs: remove dio iomap DSYNC workaround

Thanks.


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



-- 
Filipe David Manana,

“Whether you think you can, or you think you can't — you're right.”