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

Message-ID: <0000000000004dc42605f31dd05c@google.com>
Date:   Wed, 25 Jan 2023 14:04:17 -0800
From:   syzbot <syzbot+7170d66493145b71afd4@...kaller.appspotmail.com>
To:     Liam.Howlett@...cle.com, brauner@...nel.org,
        dan.carpenter@...cle.com, dvyukov@...gle.com,
        liam.howlett@...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

syzbot suspects this issue was fixed by commit:

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