From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (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 C68EE398FA3 for ; Thu, 4 Dec 2025 23:06:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764889588; cv=none; b=B2rNjZXVWF1kYQW/d/ORXVBSkENc9RhIc/5+U44QB+IJZYLFVtioJCNdwRXISPL2+eAnwgb83bA2wZ74iL1gxKF85oDcm4BJeUN/uR7lNyws8oDDqAcvpdB6ab+ValLOofM8pkv4c9A/zqr6t4m1tZp0h04ZaS0D1kjj1jAMkss= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764889588; c=relaxed/simple; bh=giNSoCSbhpXjGbgHLlFwP7vKZOFxuAaVqP8eFIZ+6H8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=kh5UVj79mIp/+f6yzY5o60UJMesqeigzRS4ZzuSoF9cWaNG/s+JjKIDnfBjcpzyQM3sIRut4qro1XogPlAFKKbY7jYbNsf9HD+bInWoBNU4nnjREyE29CqEESipHhuTB0+Z39GcCePZxtdXhb8zoGKbA44JjVEqP/mF39uNZ8jk= 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=209.85.167.208 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-oi1-f208.google.com with SMTP id 5614622812f47-450adce3ee8so2943108b6e.1 for ; Thu, 04 Dec 2025 15:06:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764889586; x=1765494386; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/JbadZ7COpe+F2eYyyrsqq4UTVq0oPWQw8RvHpqF6dk=; b=g/qR1JXHVBYFHc4qxImHSBFvDo2cQYsjV9EYmJQElvTXc1/8Iifn+mmef0+EnOV3dh kJT5y2LgdkLfiNv2k1fe6nKzZXPF3BYhX4iZ/R8g1FBEKSioymx8Xl/sNr5/Hd94qNcu oeaDe8LI9NfFnnFJ6yIauk9vNGxScXhlK3JNhUBjYTL/8ZCdiF9I6z0SyzcOwltJFOFS IwCCFlHKxA42JnsYfbDLvlOZBaoceYrkEa1F6+z7aHXBA7RuJp14ZEpLUChF8ZZuse62 tDbzt/g7pullK9qmTJNACs0+njgNmxXBxGtmfVCDX/gxFgfRNXI3pQ8s/aiZLh0fct80 ehRg== X-Forwarded-Encrypted: i=1; AJvYcCVSuXHHHLAKGmhpxfHmIUhi5XKbtYRDChGP3JH5prQMp0oorBT5l8vqfH4b7uK/nqN4oqEgFKBEK+OR/GE=@vger.kernel.org X-Gm-Message-State: AOJu0YzVR3mpB3IEw3MJyESll6zT+7swHYdkT6KiEsi5U/cjOOUMZvCt 6AlRMSi+Hsuv9TV9fmM1MwXrWvh4lbtHZ0ScsaYHQZH2bikhlVaDnAvU2fGNKcJr0IyGT1kW2CN DTA/hKiS9TXOK3MbwoJTW3ngLyieHXIk5FqvRGhlnVX2t/bESR0rfPHCKW2Q= X-Google-Smtp-Source: AGHT+IHKYf+e/y2MSropsrWokahtNt0jZVYHT8jhjy/HxIKNg6j2WC8ur2AoIX7XdeGO04FZy5MRZpDCb/a0N1wtEoNnBVASmVF6 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2191:b0:450:c976:496c with SMTP id 5614622812f47-4536e39e3d7mr4200225b6e.3.1764889585861; Thu, 04 Dec 2025 15:06:25 -0800 (PST) Date: Thu, 04 Dec 2025 15:06:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <693213f1.a70a0220.d98e3.01de.GAE@google.com> Subject: [syzbot] [jfs?] general protection fault in inode_cgwb_move_to_attached From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7d31f578f323 Add linux-next specific files for 20251128 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=142970c2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6336d8e94a7c517d dashboard link: https://syzkaller.appspot.com/bug?extid=90f56ac0963995f6a919 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6b49d8ad90de/disk-7d31f578.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dbe2d4988ca7/vmlinux-7d31f578.xz kernel image: https://storage.googleapis.com/syzbot-assets/fc0448ab2411/bzImage-7d31f578.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+90f56ac0963995f6a919@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0104620b0f: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000823105878-0x000000082310587f] CPU: 0 UID: 0 PID: 5833 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__list_del_entry_valid_or_report+0xa6/0x190 lib/list_debug.c:65 Code: 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 fe 5c 90 fd 49 39 1f 0f 85 92 00 00 00 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 db 5c 90 fd 49 39 1f 0f 85 9e 00 RSP: 0018:ffffc900041df8a8 EFLAGS: 00010206 RAX: 1ffff1100a98fb05 RBX: ffff888054c7d828 RCX: ffff88802b525b80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888054c7d830 RBP: 0000000000000001 R08: ffff888054c7d71b R09: 1ffff1100a98fae3 R10: dffffc0000000000 R11: ffffed100a98fae4 R12: 0000000104620b0f R13: dffffc0000000000 R14: 0000000823105870 R15: 0000000823105878 FS: 0000555557b3f500(0000) GS:ffff888125e4f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8a55156c0 CR3: 0000000064058000 CR4: 00000000003526f0 Call Trace: __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del_init include/linux/list.h:295 [inline] inode_cgwb_move_to_attached+0x294/0x580 fs/fs-writeback.c:323 writeback_single_inode+0x655/0xc70 fs/fs-writeback.c:1875 write_inode_now+0x160/0x1d0 fs/fs-writeback.c:2924 iput_final fs/inode.c:1941 [inline] iput+0xa77/0x1030 fs/inode.c:2003 jfs_umount+0x199/0x3c0 fs/jfs/jfs_umount.c:65 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x135/0x2c0 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1328 task_work_run+0x1d4/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0xff/0x4f0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fad1a390a77 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffffbd10c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fad1a413d7d RCX: 00007fad1a390a77 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffffbd10cd0 RBP: 00007ffffbd10cd0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffffbd11d60 R13: 00007fad1a413d7d R14: 000000000002fabf R15: 00007ffffbd11da0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0xa6/0x190 lib/list_debug.c:65 Code: 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 fe 5c 90 fd 49 39 1f 0f 85 92 00 00 00 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 db 5c 90 fd 49 39 1f 0f 85 9e 00 RSP: 0018:ffffc900041df8a8 EFLAGS: 00010206 RAX: 1ffff1100a98fb05 RBX: ffff888054c7d828 RCX: ffff88802b525b80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888054c7d830 RBP: 0000000000000001 R08: ffff888054c7d71b R09: 1ffff1100a98fae3 R10: dffffc0000000000 R11: ffffed100a98fae4 R12: 0000000104620b0f R13: dffffc0000000000 R14: 0000000823105870 R15: 0000000823105878 FS: 0000555557b3f500(0000) GS:ffff888125e4f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8a55156c0 CR3: 0000000064058000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 4d 89 fc mov %r15,%r12 3: 49 c1 ec 03 shr $0x3,%r12 7: 43 80 3c 2c 00 cmpb $0x0,(%r12,%r13,1) c: 74 08 je 0x16 e: 4c 89 ff mov %r15,%rdi 11: e8 fe 5c 90 fd call 0xfd905d14 16: 49 39 1f cmp %rbx,(%r15) 19: 0f 85 92 00 00 00 jne 0xb1 1f: 4d 8d 7e 08 lea 0x8(%r14),%r15 23: 4d 89 fc mov %r15,%r12 26: 49 c1 ec 03 shr $0x3,%r12 * 2a: 43 80 3c 2c 00 cmpb $0x0,(%r12,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ff mov %r15,%rdi 34: e8 db 5c 90 fd call 0xfd905d14 39: 49 39 1f cmp %rbx,(%r15) 3c: 0f .byte 0xf 3d: 85 .byte 0x85 3e: 9e sahf --- 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