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2002:a05:6820:199a:b0:6aa:f172:3094 with SMTP id 006d021491bc7-6ae96cb428bmr5074098eaf.10.1785969807042; Wed, 05 Aug 2026 15:43:27 -0700 (PDT) Date: Wed, 05 Aug 2026 15:43:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a73bc8f.5aeeccc9.207e63.0001.GAE@google.com> Subject: [syzbot] [nfc?] WARNING in port100_send_cmd_async/usb_submit_urb (3) From: syzbot To: david@ixit.cz, krzk@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, oe-linux-nfc@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15b613b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=89f5f8143d8e62af2b61 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=17379bb9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1073be32580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-848acc8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6fb497cc0c8d/vmlinux-848acc8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/663ccee34982/bzImage-848acc8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+89f5f8143d8e62af2b61@syzkaller.appspotmail.com usb 5-1: Product: syz usb 5-1: Manufacturer: syz usb 5-1: SerialNumber: syz ------------[ cut here ]------------ URB ffff88803435b300 submitted while active WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x1689/0x19b0 drivers/usb/core/urb.c:379, CPU#1: kworker/1:0/29 Modules linked in: CPU: 1 UID: 0 PID: 29 Comm: kworker/1:0 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 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 9e ed 89 fa 48 8d 3d a7 6d af 09 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:ffffc90000686e38 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88803435b300 RCX: 1ffff1100686b7d1 RDX: ffff88801f6c2540 RSI: ffff88803435b300 RDI: ffffffff912fe4f0 RBP: ffff8880350c0c68 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880350c0c38 R13: ffff88802ef4fe00 R14: ffff88803823bcc0 R15: ffff8880350c0c60 FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33463fff CR3: 000000003f4ce000 CR4: 0000000000352ef0 Call Trace: port100_send_frame_async drivers/nfc/port100.c:783 [inline] port100_send_cmd_async+0x7f7/0xc60 drivers/nfc/port100.c:879 port100_send_cmd_sync drivers/nfc/port100.c:919 [inline] port100_set_command_type drivers/nfc/port100.c:990 [inline] port100_probe+0xb4c/0x1190 drivers/nfc/port100.c:1555 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396 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:291 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:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x30a3/0x4a60 drivers/usb/core/hub.c:5953 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+0x72b/0xd50 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 9e ed 89 fa call 0xfa89edbe 20: 48 8d 3d a7 6d af 09 lea 0x9af6da7(%rip),%rdi # 0x9af6dce 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