syzbot

keyspan 1-1:131.58: probe with driver keyspan failed with error -2
keyspan 1-1:131.113: Keyspan - (without firmware) converter detected
usb 1-1: Direct firmware load for keyspan/usa49w.fw failed with error -2
usb 1-1: Falling back to sysfs fallback for: keyspan/usa49w.fw
------------[ cut here ]------------
ret
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/1:7/5806
WARNING: drivers/base/firmware_loader/fallback.c:148 at firmware_fallback_sysfs+0x755/0xa40 drivers/base/firmware_loader/fallback.c:238, CPU#1: kworker/1:7/5806
Modules linked in:
CPU: 1 UID: 0 PID: 5806 Comm: kworker/1:7 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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+0x755/0xa40 drivers/base/firmware_loader/fallback.c:238
Code: b5 fb e9 48 fc ff ff e8 f9 39 b5 fb c6 05 9c af 0b 0a 01 48 c7 c7 60 d7 54 8c e8 96 b8 16 fb e9 70 fc ff ff e8 dc 39 b5 fb 90 <0f> 0b 90 4c 89 f7 48 c7 c6 60 d8 54 8c 4c 89 e2 e8 a6 46 1b fb e9
RSP: 0018:ffffc900050ce9a0 EFLAGS: 00010283
RAX: ffffffff8610f6c4 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc90019ec9000 RSI: 0000000000070b1f RDI: 0000000000070b20
RBP: 0000000000000001 R08: ffffffff9032bff7 R09: 1ffffffff20657fe
R10: dffffc0000000000 R11: fffffbfff20657ff R12: ffffffff8c8b5660
R13: 0000000000001770 R14: ffff888057a870b0 R15: 00000000fffffff5
FS:  0000000000000000(0000) GS:ffff88812532a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000004b2010 CR3: 000000000e746000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 _request_firmware+0x1049/0x1780 drivers/base/firmware_loader/main.c:898
 request_firmware+0x36/0x50 drivers/base/firmware_loader/main.c:948
 request_ihex_firmware include/linux/ihex.h:71 [inline]
 ezusb_ihex_firmware_download drivers/usb/misc/ezusb.c:66 [inline]
 ezusb_fx1_ihex_firmware_download+0xba/0xcf0 drivers/usb/misc/ezusb.c:123
 keyspan_fake_startup+0x230/0x4a0 drivers/usb/serial/keyspan.c:1677
 usb_serial_probe+0x2523/0x2e50 drivers/usb/serial/usb-serial.c:1120
 usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_new_device+0x99d/0x1620 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+0x28e8/0x4d30 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>