From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f8.google.com (mail-oi2-f8.google.com [74.125.231.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 998152D7BF for ; Fri, 28 Aug 2026 02:12:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787883153; cv=none; b=EkmnMVvA4RWNpzo2G2xIXONu/O//MUOblgvUujuoAv4VK5AMlAD4/Shn92XMyIOA0PEJkL89PTt1IJm+YyqKx40uPsAemwao10RW+CTDq38pP+KA7d0G34nNIITi+8E7tFv/X5WE8Tw1z3gVoGl9TATUM/ao/yCgoNrxAxSPSb4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787883153; c=relaxed/simple; bh=1hj/OJUPVgN/qtjAcfKjFM4OTZS4RU71LNIa3Vsl+FE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=eWBdrvx6ELeMDeYJJRLON2MTyQ9q5ou9TPfRDtKxQRqToJs3GKvDwYfHI79Rv5evjaaG5SQioR4Xi05CQgMVSwab0WGDJEVPvcBTcRpoczCXYCug5YfU2oehtgyle+Xb3x0lpkwgJYJf8Pr8a7bGzazmCXDsGDO7hiyANLlFcuo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=74.125.231.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi2-f8.google.com with SMTP id 46e09a7af769-7f0355eb4b3so190329a34.0 for ; Thu, 27 Aug 2026 19:12:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787883150; x=1788487950; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=j631KfuXT7Q6Z7MHV3kuKtSJxOKHdXGjbHFa8rcKGNM=; b=KV6xaUWAP05vOMGbQdiR98bffwj8+KR5xQD3tNWKjFTMZX/dtmavvIyLH43aUPO+OF qGbVpDjczdes5LpFkitxfF+JxKZZh/K1jF36I0+sQXE+5LnFYA/iAfYJVnmH/m5Wg0We 7KS+5V2ghCDY5Ap2nC6h0hr7kEiHrvvcL8AvUVDDwT/95LLk6cAYnWiQ67ygdkzdZU3H If+e8Kojfq+WZkjolAWxh0OVnzFAKNm5PvfX8cvhpvFRydu50FhYHm1m/M5bg3+Phcip TReNYbkUvnY9moC8av02e55DvQMq/U+6tmAotFCg8j6nfwJl2HyuEkOFFI/mfc+TQc+r kSPw== X-Forwarded-Encrypted: i=1; AHgh+RoaIj1Tro9OFhw8ooWsyW9K006Y6w5iAt8kxiZaefgGKZ/ukk4mk5V3l/jfaL/cq3nwk7okcqS6Emr9fQ==@lists.linux.dev X-Gm-Message-State: AFuF++k+w/Ds3V5fBmPGtj+cTyiqS9WSXt/Lp6+0vOVxcU+W5asNBN1C QfoR/7szKCDNGtK6haN7kSOQ1bXRyYIRmhadHDqooE7Hx/ja9MlRcQdeMUylafc6b+g1DSFHhbc HWrwMKzZBFGRKpuo+NS63hyiQt/xQxbRSoxg8lC2I60UgeH3tuGwQLcBgYNE= Precedence: bulk X-Mailing-List: ocfs2-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:26a:b0:6ae:c68b:3a7 with SMTP id 006d021491bc7-6b1c6753623mr2478306eaf.16.1787883150511; Thu, 27 Aug 2026 19:12:30 -0700 (PDT) Date: Thu, 27 Aug 2026 19:12:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a90ee8e.1d9ded08.62e62.00e1.GAE@google.com> Subject: [syzbot] [ocfs2?] kernel BUG in ocfs2_write_begin_nolock (3) From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4352b8aee980 Merge tag 'i3c/for-7.3' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14fc3549580000 kernel config: https://syzkaller.appspot.com/x/.config?x=335632b21d0ce540 dashboard link: https://syzkaller.appspot.com/bug?extid=fd44623201beb5f3b462 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8491c9d0d35e/disk-4352b8ae.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/51cc3aee80d1/vmlinux-4352b8ae.xz kernel image: https://storage.googleapis.com/syzbot-assets/e0bcbebdbede/bzImage-4352b8ae.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fd44623201beb5f3b462@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ocfs2/aops.c:1391! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 7883 Comm: syz.6.469 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:ocfs2_populate_write_desc fs/ocfs2/aops.c:1391 [inline] RIP: 0010:ocfs2_write_begin_nolock+0x41b2/0x41f0 fs/ocfs2/aops.c:1689 Code: 84 3a e3 fd 49 bf 00 00 00 00 00 fc ff df 4c 8b 24 24 e9 62 fe ff ff e8 7c 50 fc 07 e8 67 3a e3 fd 90 0f 0b e8 5f 3a e3 fd 90 <0f> 0b e8 57 3a e3 fd 90 0f 0b e8 4f 3a e3 fd 90 0f 0b e8 47 3a e3 RSP: 0018:ffffc900060df2e0 EFLAGS: 00010293 RAX: ffffffff83e3f321 RBX: ffff88802a26c010 RCX: ffff88802ec5be80 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc900060df880 R08: ffff88802ec5be80 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: ffff88802a26c000 R13: 1ffff110041ec81f R14: 0000000000000003 R15: 0000000000000000 FS: 0000555591908500(0000) GS:ffff888124cf3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5117ed158 CR3: 000000005a889000 CR4: 0000000000350ef0 Call Trace: __ocfs2_page_mkwrite fs/ocfs2/mmap.c:92 [inline] ocfs2_page_mkwrite+0x640/0xb60 fs/ocfs2/mmap.c:143 do_page_mkwrite+0x147/0x310 mm/memory.c:3754 wp_page_shared mm/memory.c:4155 [inline] do_wp_page+0x1a9c/0x4b80 mm/memory.c:4378 handle_pte_fault mm/memory.c:6520 [inline] __handle_mm_fault mm/memory.c:6645 [inline] handle_mm_fault+0x1576/0x3720 mm/memory.c:6814 do_user_addr_fault+0x746/0x1340 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f5f73c67682 Code: 30 48 8b 14 24 48 85 d2 74 17 8b 44 24 10 0f c8 89 c0 48 89 44 24 10 48 83 fa 01 0f 85 aa 02 00 00 48 8b 44 24 18 8b 74 24 10 <89> 30 e9 1e fe ff ff 48 8b 44 24 18 8b 10 48 8b 04 24 48 85 c0 0f RSP: 002b:00007ffd7d7d31a0 EFLAGS: 00010246 RAX: 0000200000000180 RBX: 0000000000000004 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005555919083d8 RBP: 00007ffd7d7d32c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00007ffd7d7d3300 R13: 00007f5f7402609c R14: 000000000002ae89 R15: 00007ffd7d7d32e0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_populate_write_desc fs/ocfs2/aops.c:1391 [inline] RIP: 0010:ocfs2_write_begin_nolock+0x41b2/0x41f0 fs/ocfs2/aops.c:1689 Code: 84 3a e3 fd 49 bf 00 00 00 00 00 fc ff df 4c 8b 24 24 e9 62 fe ff ff e8 7c 50 fc 07 e8 67 3a e3 fd 90 0f 0b e8 5f 3a e3 fd 90 <0f> 0b e8 57 3a e3 fd 90 0f 0b e8 4f 3a e3 fd 90 0f 0b e8 47 3a e3 RSP: 0018:ffffc900060df2e0 EFLAGS: 00010293 RAX: ffffffff83e3f321 RBX: ffff88802a26c010 RCX: ffff88802ec5be80 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc900060df880 R08: ffff88802ec5be80 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: ffff88802a26c000 R13: 1ffff110041ec81f R14: 0000000000000003 R15: 0000000000000000 FS: 0000555591908500(0000) GS:ffff888124cf3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc50359f6c CR3: 000000005a889000 CR4: 0000000000350ef0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup