From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f79.google.com (mail-oo1-f79.google.com [209.85.161.79]) (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 8D3FF2D0C6C for ; Sat, 6 Dec 2025 18:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765046608; cv=none; b=stesUX9dfnXsl2oJd3BtKg3LPKG8Y78yepW3VYliV/rZ+PmKP4HvkSAfnWv629KMvEPpvhJsPiLPOoBxl+S0HdKlet+ts658jC8xvlKByQWEx9Jw3pKcna3dapvAdqMAA8XUlQ0khpl++RLEUT6wXG2+Zxew+vnqVexda+tlYfM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765046608; c=relaxed/simple; bh=mdMrjc4h5pvS1zSyuVuLFdmSNOl0SIsXb1MbnbEdyX4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=pB7doI9MeK2oWmV/Wtr8xyrG+GRXJJBJFbLCwSZWyfl4pe7iKDF+N/GlFG0R7sgunjDzL3gHM90BB3JbJOkXNv73yHUUDsdV5l7EN7kS+TAd5shHsSJZ0QBq6lBuLZt6ck72yh+NFmPKKZioQGJ1ugUts7JKDSxkGTedAswa51s= 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=209.85.161.79 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-oo1-f79.google.com with SMTP id 006d021491bc7-65716511512so3764706eaf.1 for ; Sat, 06 Dec 2025 10:43:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765046605; x=1765651405; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=HrnUl006fZneJtVvzqzuGNHqS4IXSc9Tpbbms7ul/tU=; b=sOqaCJk0RdPUtrcrtj6bFaU3Ns7v8bqznga3ZqbRK8XzU2lcVsHNHKZtaE67T5pKXg JPvAvSGAU4MX/w84ADViXr4hd9q+54hGz/oawZASMPGprt2tgHNPwedAJzTKQNRHOkJg CVduCpo/mPw0duko66KVH4VCTNzApaXuKr47SbMsA+CyE0qNub7JFDrL4aE093AeyrRq 4NWmgFGUg1CMMReNpJDmzLTRboZzix63Zd2M7sUxhZ4DdxF4iThbhw70HraPTfDAwpHK sJuJJuumYAO0ftR9LeNj6AC7x3W1h3gpPa8+lbUX/OnP5qYLFqFuoDJ1GPBBDERxBY3w hH/Q== X-Forwarded-Encrypted: i=1; AJvYcCUEb5wPf8+QNRw9ikVT/8zjsHDryRFAfH6fp120TQnLJtnUi8m0OF+perjxO9AdPfmZep6+PorIPI+0gw==@vger.kernel.org X-Gm-Message-State: AOJu0YxUfmyCL9TwdyLPaIVl+CBnnlnMOolzWO8xhWXmAPreG0ND2bII Ye5YUQlGTMgG6buDhpDo+846iAjRRZpjnxwkWZovr3NlK/1Tg+PDtIjoQRNQe4lEDYSOK/7NAE0 +ErbYzheblu9rcbpe3wuMzdLBhK3axC8zUMUMXn/8nyO/RTOaFk1u6X3f7Co= X-Google-Smtp-Source: AGHT+IGCN2TMcutC2LIqP+lgJPJ5D5CzQL76MRaZMZqhiy1P8zAdpDv0Qemu2l/7thiXQojd23u5d+aReYdJmc3oOBF5CW64xih7 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2911:b0:659:9a49:9077 with SMTP id 006d021491bc7-6599a97d923mr1169885eaf.66.1765046605709; Sat, 06 Dec 2025 10:43:25 -0800 (PST) Date: Sat, 06 Dec 2025 10:43:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6934794d.a70a0220.38f243.0034.GAE@google.com> Subject: [syzbot] [input?] WARNING in cm109_input_open From: syzbot To: dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4a26e7032d7d Merge tag 'core-bugs-2025-12-01' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=106814c2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cabbc708f0a470fb dashboard link: https://syzkaller.appspot.com/bug?extid=fed3fab8533934671abc 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/41d09ea4104d/disk-4a26e703.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e8c0f32d0475/vmlinux-4a26e703.xz kernel image: https://storage.googleapis.com/syzbot-assets/f19b39e18b64/bzImage-4a26e703.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fed3fab8533934671abc@syzkaller.appspotmail.com ------------[ cut here ]------------ URB ffff88802aa55600 submitted while active WARNING: drivers/usb/core/urb.c:380 at 0x0, CPU#1: kworker/1:4/5904 Modules linked in: CPU: 1 UID: 0 PID: 5904 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_submit_urb+0x7e/0x1890 drivers/usb/core/urb.c:380 Code: 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 97 b3 32 fb 49 83 3e 00 74 36 e8 fc 30 cd fa 48 8d 3d c5 fe 98 08 48 89 de <67> 48 0f b9 3a b8 f0 ff ff ff e9 8b 00 00 00 e8 de 30 cd fa b8 ea RSP: 0018:ffffc900042deaf0 EFLAGS: 00010287 RAX: ffffffff86f3b5f4 RBX: ffff88802aa55600 RCX: 0000000000100000 RDX: ffffc9001bb8f000 RSI: ffff88802aa55600 RDI: ffffffff8f8cb4c0 RBP: 000000000000000f R08: ffffffff8f801377 R09: 1ffffffff1f0026e R10: dffffc0000000000 R11: fffffbfff1f0026f R12: 0000000000000cc0 R13: ffff88806f531048 R14: ffff88802aa55608 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881261c5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9bb61a17e0 CR3: 0000000078b0f000 CR4: 0000000000350ef0 Call Trace: cm109_input_open+0x1fe/0x4b0 drivers/input/misc/cm109.c:566 input_open_device+0x1d3/0x390 drivers/input/input.c:601 kbd_connect+0xed/0x140 drivers/tty/vt/keyboard.c:1584 input_attach_handler drivers/input/input.c:994 [inline] input_register_device+0xd00/0x1140 drivers/input/input.c:2378 cm109_usb_probe+0x118c/0x1690 drivers/input/misc/cm109.c:797 usb_probe_interface+0x668/0xc30 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x52d/0xa60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 89 f0 mov %esi,%eax 2: 48 c1 e8 03 shr $0x3,%rax 6: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) b: 74 08 je 0x15 d: 4c 89 f7 mov %r14,%rdi 10: e8 97 b3 32 fb call 0xfb32b3ac 15: 49 83 3e 00 cmpq $0x0,(%r14) 19: 74 36 je 0x51 1b: e8 fc 30 cd fa call 0xfacd311c 20: 48 8d 3d c5 fe 98 08 lea 0x898fec5(%rip),%rdi # 0x898feec 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: b8 f0 ff ff ff mov $0xfffffff0,%eax 34: e9 8b 00 00 00 jmp 0xc4 39: e8 de 30 cd fa call 0xfacd311c 3e: b8 .byte 0xb8 3f: ea (bad) --- 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