dvb-usb: found a 'WideView WT-220U PenType Receiver (Typhoon/Freecom)' in cold state, will try to load a firmware
usb 5-1: Direct firmware load for dvb-usb-wt220u-02.fw failed with error -2
usb 5-1: Falling back to sysfs fallback for: dvb-usb-wt220u-02.fw
------------[ cut here ]------------
WARNING: CPU: 3 PID: 34 at drivers/base/firmware_loader/fallback.c:148 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:148 [inline]
WARNING: CPU: 3 PID: 34 at drivers/base/firmware_loader/fallback.c:148 firmware_fallback_sysfs+0x6d3/0xbe0 drivers/base/firmware_loader/fallback.c:238
Modules linked in:
CPU: 3 UID: 0 PID: 34 Comm: kworker/3:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: usb_hub_wq hub_event
RIP: 0010:fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:148 [inline]
RIP: 0010:firmware_fallback_sysfs+0x6d3/0xbe0 drivers/base/firmware_loader/fallback.c:238
Code: b2 fb e9 da f9 ff ff e8 9b d4 d3 fb e8 e6 6f 99 fb 31 ff 89 c3 89 c6 e8 cb cf d3 fb 85 db 0f 84 17 fb ff ff e8 7e d4 d3 fb 90 <0f> 0b 90 48 c7 c6 20 c2 20 8c 4c 89 e2 4c 89 f7 e8 88 14 f9 ff e9
RSP: 0018:ffffc900006ded08 EFLAGS: 00010287
RAX: 00000000000766ca RBX: 00000000fffffff5 RCX: ffffc9002ffb8000
RDX: 0000000000100000 RSI: ffffffff85e97432 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff5 R11: 0000000000002bd1 R12: ffffffff8c7809a0
R13: ffff88803c3e3140 R14: ffff8880594580b0 R15: 0000000000001770
FS:  0000000000000000(0000) GS:ffff8880d6cd8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff39af60d8 CR3: 000000000e182000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 _request_firmware+0xfe9/0x1470 drivers/base/firmware_loader/main.c:906
 request_firmware+0x35/0x50 drivers/base/firmware_loader/main.c:957
 dvb_usb_download_firmware+0x9c/0x270 drivers/media/usb/dvb-usb/dvb-usb-firmware.c:93
 dvb_usb_device_init+0xa0e/0x2070 drivers/media/usb/dvb-usb/dvb-usb-init.c:298
 dtt200u_usb_probe+0x66/0x120 drivers/media/usb/dvb-usb/dtt200u.c:148
 usb_probe_interface+0x303/0xa40 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031
 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
 device_add+0x1148/0x1aa0 drivers/base/core.c:3689
 usb_set_configuration+0x1187/0x1e20 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x3e0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031
 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
 device_add+0x1148/0x1aa0 drivers/base/core.c:3689
 usb_new_device+0xd07/0x1a60 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+0x2f34/0x4fe0 drivers/usb/core/hub.c:5952
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>