linux-kernel - Re: [syzbot] KASAN: use-after-free Read in mas_next

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] [day] [month] [year] [list]

Message-ID: <CACT4Y+b3P8=0aehSvEhX09A5vTNFTaME1Qse93J-zCR6zns6HQ@mail.gmail.com>
Date:   Fri, 27 Jan 2023 08:09:07 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     "Liam R. Howlett" <Liam.Howlett@...cle.com>
Cc:     syzbot <syzbot+7170d66493145b71afd4@...kaller.appspotmail.com>,
        brauner@...nel.org, dan.carpenter@...cle.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org,
        viro@...iv.linux.org.uk, wanjiabing@...o.com, willy@...radead.org
Subject: Re: [syzbot] KASAN: use-after-free Read in mas_next_nentry

On Thu, 26 Jan 2023 at 14:14, Liam R. Howlett <Liam.Howlett@...cle.com> wrote:
>
> syz fix: fs/userfaultfd: Fix maple tree iterator in userfaultfd_unregister()
>
> * syzbot <syzbot+7170d66493145b71afd4@...kaller.appspotmail.com> [230125 17:04]:
> > syzbot suspects this issue was fixed by commit:

syzbot needs the hash to parse the command:

#syz fix: fs/userfaultfd: Fix maple tree iterator in userfaultfd_unregister()

> > commit 59f2f4b8a757412fce372f6d0767bdb55da127a8
> > Author: Liam Howlett <liam.howlett@...cle.com>
> > Date:   Mon Nov 7 20:11:42 2022 +0000
> >
> >     fs/userfaultfd: Fix maple tree iterator in userfaultfd_unregister()
> >
> > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=129e8afe480000
> > start commit:   b229b6ca5abb Merge tag 'perf-tools-fixes-for-v6.1-2022-10-..
> > git tree:       upstream
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=a66c6c673fb555e8
> > dashboard link: https://syzkaller.appspot.com/bug?extid=7170d66493145b71afd4
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11bfb2a9880000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10b1d319880000
> >
> > If the result looks correct, please mark the issue as fixed by replying with:
> >
> > #syz fix: fs/userfaultfd: Fix maple tree iterator in userfaultfd_unregister()
> >
> > For information about bisection process see: https://goo.gl/tpsmEJ#bisection