From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f79.google.com (mail-ot1-f79.google.com [209.85.210.79]) (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 5658B1A38F9 for ; Mon, 25 May 2026 05:10:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779685836; cv=none; b=RNQCwjoh+Ml/WgozB0sI2tb+8rn22E8MgusYiqcNqCCYS+mbaCxVCqv/LIuSyHJzxNxFYhrFAzR65maI9ptFY9t0oV2rmyrNMogm9Xwd3flyYe55kf/H3BhK9tSXFRjr212oNpWcHv9i3ULRk22whMMxvsi+vj5zwe0zfdE153Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779685836; c=relaxed/simple; bh=v30aYATmuDmrmNd8RtDhFM1+gSZszQ/uAM7pRiV54dU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=KOkx2CUmNcc7JGNhG2Gcjj+ZaBqmWVziRuAAsXWX8XLGjlV/Z8RAsyRkQBzQ+SHfBYdWNOaNOvslGIIJAX9KRK+H4zD4NHPfFdYWq0DU6/0wC3tP0oHQknf5+K39Vbm5ZchTKLIt5/GEbkT4EJ9Hd8cG2M2KeUH/SHVWZ7msaUs= 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=209.85.210.79 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-ot1-f79.google.com with SMTP id 46e09a7af769-7e61d8d99dfso2783200a34.2 for ; Sun, 24 May 2026 22:10:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779685834; x=1780290634; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=SFYnM5zzJUJ9FQeHeE81pgk1IUuW0SaM4j3QYHTx9AI=; b=WCsfOFuANGu0pmGPl1cBd3Lbr8vb9BIjKNFt9rEqZxuL2+EyHR86ZENGw4H+KW2BYu w1XmDGAmnZ2kd05+D6F71exgc8ZIki+sv5xcdfTv1Yc7k1qxnffnCJHhBmWAdoQQzHkt s3eWNgEYxcxw0YRAkAgakRaPxaGpL7OsB4kV+gGUaRb1Gwvc6bUjr3yJ2a8RJmxKS47u qBfnOGYJPQpwspU060znHbycQ7OW3rWf39Zw14NToBiw1uuAAFzBvj0jr5yA/jX5ex7L ct4s0v6iKFQjmxH2yDmVUBu2UMVsIbFbQN8XVD5extEEIX354+o0jjyr2jxjfnfpA73y HuWQ== X-Forwarded-Encrypted: i=1; AFNElJ+ypzQkJN40CLFV4VPtfHkbVnFE2WHlhgqx3VQ83OLEWM1ta3Xtl9LKQJ0j79+LNu0riqfQsgRj6aQV0g==@lists.linux.dev X-Gm-Message-State: AOJu0Yxs7ev9K4324J6Po7I1Fhgp8Kl5c2cqmynXROehWQfsW+0HLaRG GK2LrLZHOtx0S3oEAeSp7kMyYw2I8616Rx4B/iFVzbo3egWzlu2Hg4EE2IVbmnYM7ZQbYLju7/8 FL3QID7POR4M3m9UU9J2honlR5cPQy/mFU6zna6YATt3L9nK3XGFWTOKkhsg= Precedence: bulk X-Mailing-List: ocfs2-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2d05:b0:69d:ad9a:290e with SMTP id 006d021491bc7-69dad9a2c71mr1992949eaf.6.1779685834268; Sun, 24 May 2026 22:10:34 -0700 (PDT) Date: Sun, 24 May 2026 22:10:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a13d9ca.050a0220.7dd1.0000.GAE@google.com> Subject: [syzbot] [ocfs2?] kernel BUG in ocfs2_page_mkwrite (4) 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: df685633c3db Merge tag 'rcu-fixes.v7.1-20260519a' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14674c2e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7f195f6be48c12ec dashboard link: https://syzkaller.appspot.com/bug?extid=42984127d45ad96219de compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-df685633.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0d8ce459af2e/vmlinux-df685633.xz kernel image: https://storage.googleapis.com/syzbot-assets/5f8a4c255465/bzImage-df685633.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+42984127d45ad96219de@syzkaller.appspotmail.com (syz.0.0,5323,0):__ocfs2_journal_access:724 ERROR: Error -30 getting 1 access to buffer! (syz.0.0,5323,0):ocfs2_write_end_nolock:1945 ERROR: status = -30 (syz.0.0,5323,0):ocfs2_commit_trans:401 ERROR: status = -5 ------------[ cut here ]------------ kernel BUG at fs/ocfs2/mmap.c:106! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__ocfs2_page_mkwrite fs/ocfs2/mmap.c:106 [inline] RIP: 0010:ocfs2_page_mkwrite+0xb53/0xb60 fs/ocfs2/mmap.c:143 Code: 87 6a fe e9 bc fd ff ff e8 9a 0b e3 07 e8 d5 bb fd fd 4c 89 f7 48 c7 c6 e0 1c 13 8c e8 26 f6 5f fd 90 0f 0b e8 be bb fd fd 90 <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000f937940 EFLAGS: 00010293 RAX: ffffffff83c81872 RBX: 00000000ffffffe2 RCX: ffff88801cf4a500 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00000000ffffffe2 RBP: ffffc9000f937ae0 R08: ffffffff9030f0f7 R09: 1ffffffff2061e1e R10: dffffc0000000000 R11: fffffbfff2061e1f R12: 000000000000c000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000001000 FS: 0000555567afd540(0000) GS:ffff88808c87e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000c000 CR3: 0000000041fff000 CR4: 0000000000352ef0 Call Trace: do_page_mkwrite+0x14d/0x310 mm/memory.c:3684 do_shared_fault mm/memory.c:5985 [inline] do_fault mm/memory.c:6047 [inline] do_pte_missing+0x6dc/0x33f0 mm/memory.c:4566 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6565 [inline] handle_mm_fault+0x1bd9/0x3170 mm/memory.c:6734 do_user_addr_fault+0x75b/0x1340 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f762596d749 Code: dd 00 01 74 a3 83 f9 c0 0f 87 59 fe ff ff 62 e1 fe 28 6f 4e 01 48 29 fe 48 83 c7 3f 49 8d 0c 10 48 83 e7 c0 48 01 fe 48 29 f9 a4 62 c1 fe 28 7f 00 62 c1 fe 28 7f 48 01 c3 0f 1f 80 00 00 00 RSP: 002b:00007ffda9016b28 EFLAGS: 00010202 RAX: 00002000000079c0 RBX: 0000000000000004 RCX: 0000000000000ecb RDX: 000000000000550b RSI: 00007f762540c53f RDI: 000020000000c000 RBP: fffffffffffffffe R08: 00002000000079c0 R09: 0000000000000002 R10: 000000000000550b R11: 0000000000000002 R12: 00007ffda9016c50 R13: 00007f7625c15fac R14: 0000000000014e7a R15: 00007f7625c15fa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__ocfs2_page_mkwrite fs/ocfs2/mmap.c:106 [inline] RIP: 0010:ocfs2_page_mkwrite+0xb53/0xb60 fs/ocfs2/mmap.c:143 Code: 87 6a fe e9 bc fd ff ff e8 9a 0b e3 07 e8 d5 bb fd fd 4c 89 f7 48 c7 c6 e0 1c 13 8c e8 26 f6 5f fd 90 0f 0b e8 be bb fd fd 90 <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000f937940 EFLAGS: 00010293 RAX: ffffffff83c81872 RBX: 00000000ffffffe2 RCX: ffff88801cf4a500 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00000000ffffffe2 RBP: ffffc9000f937ae0 R08: ffffffff9030f0f7 R09: 1ffffffff2061e1e R10: dffffc0000000000 R11: fffffbfff2061e1f R12: 000000000000c000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000001000 FS: 0000555567afd540(0000) GS:ffff88808c87e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000c000 CR3: 0000000041fff000 CR4: 0000000000352ef0 --- 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