linux-kernel - Re: [syzbot] [ext4?] KASAN: use-after-free Read in __ext4_check_dir

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: <67fa74b3.050a0220.379d84.000e.GAE@google.com>
Date: Sat, 12 Apr 2025 07:12:03 -0700
From: syzbot <syzbot+09921540dd04aba82a35@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, jack@...e.cz, libaokun1@...wei.com, 
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, tytso@....edu, yi.zhang@...wei.com
Subject: Re: [syzbot] [ext4?] KASAN: use-after-free Read in
 __ext4_check_dir_entry (3)

syzbot suspects this issue was fixed by commit:

commit 26343ca0df715097065b02a6cddb4a029d5b9327
Author: Baokun Li <libaokun1@...wei.com>
Date:   Wed Jan 22 11:05:27 2025 +0000

    ext4: reject the 'data_err=abort' option in nojournal mode

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15734870580000
start commit:   e32cde8d2bd7 Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=1f009dd80b3799c2
dashboard link: https://syzkaller.appspot.com/bug?extid=09921540dd04aba82a35
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=102f23d0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1082e580580000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: ext4: reject the 'data_err=abort' option in nojournal mode

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