syzbot

dvb_usb_dibusb_mb 4-1:0.104: probe with driver dvb_usb_dibusb_mb failed with error -22
dvb-usb: found a 'Artec T1 USB2.0 TVBOX (please check the warm ID)' in cold state, will try to load a firmware
usb 4-1: Direct firmware load for dvb-usb-dibusb-6.0.0.8.fw failed with error -2
usb 4-1: Falling back to sysfs fallback for: dvb-usb-dibusb-6.0.0.8.fw
------------[ cut here ]------------
WARNING: drivers/base/firmware_loader/fallback.c:148 at fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:148 [inline], CPU#1: kworker/1:0/24
WARNING: drivers/base/firmware_loader/fallback.c:148 at firmware_fallback_sysfs+0x746/0xa40 drivers/base/firmware_loader/fallback.c:238, CPU#1: kworker/1:0/24
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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+0x746/0xa40 drivers/base/firmware_loader/fallback.c:238
Code: eb fb e9 5d fc ff ff e8 88 f6 eb fb c6 05 39 3b 97 09 01 48 c7 c7 80 20 e9 8b e8 45 a6 52 fb e9 85 fc ff ff e8 6b f6 eb fb 90 <0f> 0b 90 4c 89 f7 48 c7 c6 80 21 e9 8b 4c 89 e2 e8 55 0e 57 fb e9
RSP: 0018:ffffc900001e6870 EFLAGS: 00010283
RAX: ffffffff85d501e5 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc90019d9f000 RSI: 000000000003e2ee RDI: 000000000003e2ef
RBP: 0000000000000001 R08: ffffffff8f822477 R09: 1ffffffff1f0448e
R10: dffffc0000000000 R11: fffffbfff1f0448f R12: ffffffff8c32b360
R13: 0000000000001770 R14: ffff88806a6860b0 R15: 00000000fffffff5
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 0000000033c9a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000001
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 _request_firmware+0xfa4/0x1680 drivers/base/firmware_loader/main.c:898
 request_firmware+0x36/0x50 drivers/base/firmware_loader/main.c:948
 dvb_usb_download_firmware+0xaf/0x260 drivers/media/usb/dvb-usb/dvb-usb-firmware.c:93
 dvb_usb_device_init+0xdd2/0x2580 drivers/media/usb/dvb-usb/dvb-usb-init.c:298
 usb_probe_interface+0x668/0xc90 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26d/0xad0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831
 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:500
 __device_attach+0x2b8/0x430 drivers/base/dd.c:1031
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574
 device_add+0x7b6/0xb80 drivers/base/core.c:3689
 usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c4/0x3c0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26d/0xad0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831
 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:500
 __device_attach+0x2b8/0x430 drivers/base/dd.c:1031
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574
 device_add+0x7b6/0xb80 drivers/base/core.c:3689
 usb_new_device+0xa39/0x1720 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+0x29b1/0x4ef0 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>