linux-kernel - Re: [syzbot] [ocfs2?] KASAN: slab-use-after-free Read in ocfs2_reserve_suballoc

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Message-ID: <6969d41e.050a0220.58bed.003e.GAE@google.com>
Date: Thu, 15 Jan 2026 22:01:02 -0800
From: syzbot <syzbot+af14efe17dfa46173239@...kaller.appspotmail.com>
To: activprithvi@...il.com, akpm@...ux-foundation.org, 
	david.hunter.linux@...il.com, dmantipov@...dex.ru, heming.zhao@...e.com, 
	jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, khalid@...nel.org, 
	linux-kernel-mentees@...ts.linux.dev, linux-kernel@...r.kernel.org, 
	mark@...heh.com, ocfs2-devel@...ts.linux.dev, skhan@...uxfoundation.org, 
	stable@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [ocfs2?] KASAN: slab-use-after-free Read in ocfs2_reserve_suballoc_bits

syzbot suspects this issue was fixed by commit:

commit e1c70505ee8158c1108340d9cd67182ade93af4a
Author: Dmitry Antipov <dmantipov@...dex.ru>
Date:   Thu Oct 30 15:30:02 2025 +0000

    ocfs2: add extra consistency checks for chain allocator dinodes

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=140a0852580000
start commit:   36c254515dc6 Merge tag 'powerpc-6.12-4' of git://git.kerne..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995
dashboard link: https://syzkaller.appspot.com/bug?extid=af14efe17dfa46173239
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13444727980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11861440580000

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

#syz fix: ocfs2: add extra consistency checks for chain allocator dinodes

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