From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 815B7449B11 for ; Fri, 31 Jul 2026 17:14:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785518073; cv=none; b=L2QQjkMw2sQHxs178A/fP6uSfEJG42M/Yyrb4OqbXWK62NbU6y375AUs6yfzN/00yKwvakFQMx0sEqQFAj2wtsslW7iTe5h8QjEa/KtWZsfxBvKx6bitD4Rcya2Y/xr6QpH/8+lZnIhfE0Y7AFdB6f7OzjthI7APl5rnWCL/LM4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785518073; c=relaxed/simple; bh=MaEk9IhYqtSp5p8XQpWZpSgVOWuSjHZoEn9KLCOdXmg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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SMTP id 5614622812f47-4af5e18ac5amr1294243b6e.8.1785518070536; Fri, 31 Jul 2026 10:14:30 -0700 (PDT) Date: Fri, 31 Jul 2026 10:14:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6cd7f6.2d659fcc.1d46f5.0198.GAE@google.com> Subject: [syzbot] [usb?] WARNING in cxacru_cm/usb_submit_urb (3) From: syzbot To: 3chas3@gmail.com, accessrunner-general@lists.sourceforge.net, gregkh@linuxfoundation.org, linux-atm-general@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 5d5fd841c346 Merge 7.2-rc5 into usb-next git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=14ebcaea580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ec4d592e55f7960 dashboard link: https://syzkaller.appspot.com/bug?extid=f254240f0da61e58c9ef compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=157ca5b9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a77a49580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2ed536ae4daf/disk-5d5fd841.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ab40098ccbf1/vmlinux-5d5fd841.xz kernel image: https://storage.googleapis.com/syzbot-assets/66d5c395f47c/bzImage-5d5fd841.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f254240f0da61e58c9ef@syzkaller.appspotmail.com cxacru 4-1:1.0: send of cm 0x84 failed (-104) ATM dev 0: cxacru_atm_start: CHIP_ADSL_LINE_START returned -104 ------------[ cut here ]------------ URB ffff8881136a1a00 submitted while active WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x1689/0x19b0 drivers/usb/core/urb.c:379, CPU#0: kworker/0:2/1122 Modules linked in: CPU: 0 UID: 0 PID: 1122 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_submit_urb+0x168c/0x19b0 drivers/usb/core/urb.c:379 Code: 00 48 8b 04 24 48 8b 90 b0 00 00 00 e9 70 ff ff ff bb ed ff ff ff e9 ac f1 ff ff e8 ae c8 ba fc 48 8d 3d 97 28 01 06 48 89 de <67> 48 0f b9 3a bb f0 ff ff ff e9 8e f1 ff ff c7 44 24 30 00 00 00 RSP: 0018:ffffc900030deb98 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8881136a1a00 RCX: 0000000000000000 RDX: ffff88810df81e00 RSI: ffff8881136a1a00 RDI: ffffffff8afa6430 RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc900030dec20 R11: 0000000000000000 R12: 0000000000000040 R13: ffff88811dc98000 R14: ffff8881129a3000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888268636000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ae16b61948 CR3: 0000000115e52000 CR4: 00000000003506f0 Call Trace: cxacru_cm+0x202/0x950 drivers/usb/atm/cxacru.c:631 cxacru_cm_get_array drivers/usb/atm/cxacru.c:722 [inline] cxacru_poll_status+0x147/0xdc0 drivers/usb/atm/cxacru.c:828 cxacru_atm_start+0x203/0x240 drivers/usb/atm/cxacru.c:814 usbatm_atm_init+0x196/0x360 drivers/usb/atm/usbatm.c:927 usbatm_usb_probe+0x147e/0x1b50 drivers/usb/atm/usbatm.c:1178 cxacru_usb_probe+0x101/0x200 drivers/usb/atm/cxacru.c:1370 usb_probe_interface+0x386/0x9b0 drivers/usb/core/driver.c:399 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2700 hub_port_connect drivers/usb/core/hub.c:5572 [inline] hub_port_connect_change drivers/usb/core/hub.c:5712 [inline] port_event drivers/usb/core/hub.c:5876 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5958 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 00 48 8b add %cl,-0x75(%rax) 3: 04 24 add $0x24,%al 5: 48 8b 90 b0 00 00 00 mov 0xb0(%rax),%rdx c: e9 70 ff ff ff jmp 0xffffff81 11: bb ed ff ff ff mov $0xffffffed,%ebx 16: e9 ac f1 ff ff jmp 0xfffff1c7 1b: e8 ae c8 ba fc call 0xfcbac8ce 20: 48 8d 3d 97 28 01 06 lea 0x6012897(%rip),%rdi # 0x60128be 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: bb f0 ff ff ff mov $0xfffffff0,%ebx 34: e9 8e f1 ff ff jmp 0xfffff1c7 39: c7 .byte 0xc7 3a: 44 24 30 rex.R and $0x30,%al 3d: 00 00 add %al,(%rax) --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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