syzbot

dvb-usb: found a 'Prof 1100 USB ' in cold state, will try to load a firmware
usb 6-1: Direct firmware load for dvb-usb-p1100.fw failed with error -2
usb 6-1: Falling back to sysfs fallback for: dvb-usb-p1100.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#0: kworker/0:7/5946
WARNING: drivers/base/firmware_loader/fallback.c:148 at firmware_fallback_sysfs+0x6d3/0xc40 drivers/base/firmware_loader/fallback.c:238, CPU#0: kworker/0:7/5946
Modules linked in:
CPU: 0 UID: 0 PID: 5946 Comm: kworker/0:7 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+0x6d3/0xc40 drivers/base/firmware_loader/fallback.c:238
Code: ae fb e9 da f9 ff ff e8 2b 22 d1 fb e8 d6 6e 95 fb 31 ff 89 c3 89 c6 e8 bb 1c d1 fb 85 db 0f 84 17 fb ff ff e8 0e 22 d1 fb 90 <0f> 0b 90 48 c7 c6 40 8c 22 8c 4c 89 e2 4c 89 f7 e8 d8 04 f9 ff e9
RSP: 0018:ffffc9000470ec60 EFLAGS: 00010246
RAX: 0000000000100000 RBX: 00000000fffffff5 RCX: ffffc9001974b000
RDX: 0000000000100000 RSI: ffffffff85edc482 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff5 R11: 0000000000002ba1 R12: ffffffff8c7bdca0
R13: ffff888074d6f6c0 R14: ffff8880809140b0 R15: 0000000000001770
FS:  0000000000000000(0000) GS:ffff8881248f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc5c1f84c0 CR3: 000000000e184000 CR4: 00000000003526f0
DR0: 0000000000000001 DR1: fffffffffffffff7 DR2: 0000000000000000
DR3: 000000000000000a DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 _request_firmware+0x101c/0x14e0 drivers/base/firmware_loader/main.c:898
 request_firmware+0x35/0x50 drivers/base/firmware_loader/main.c:948
 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
 dw2102_probe+0xf4/0x240 drivers/media/usb/dvb-usb/dw2102.c:2598
 usb_probe_interface+0x303/0xa80 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xb20 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x470 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x350 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031
 device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086
 bus_probe_device+0x64/0x150 drivers/base/bus.c:574
 device_add+0x116e/0x1980 drivers/base/core.c:3689
 usb_set_configuration+0x1187/0x1e50 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xb20 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x470 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x350 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031
 device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086
 bus_probe_device+0x64/0x150 drivers/base/bus.c:574
 device_add+0x116e/0x1980 drivers/base/core.c:3689
 usb_new_device+0xd07/0x1a90 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+0x313a/0x52f0 drivers/usb/core/hub.c:5953
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>