emi26 - firmware loader 5-1:1.0: emi26_probe start
usb 5-1: Direct firmware load for emi26/loader.fw failed with error -2
usb 5-1: Falling back to sysfs fallback for: emi26/loader.fw
====================================
WARNING: syz.4.42/5954 still has locks held!
syzkaller #0 Not tainted
------------------------------------
5 locks held by syz.4.42/5954:
 #0: ffff888031e81328 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259
 #1: ffff888035fc8500 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2733 [inline]
 #1: ffff888035fc8500 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 fs/read_write.c:683
 #2: ffff888035ffe478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 fs/kernfs/file.c:336
 #3: ffff888062348210 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #3: ffff888062348210 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1170 [inline]
 #3: ffff888062348210 (&dev->mutex){....}-{4:4}, at: device_driver_attach+0xac/0x1d0 drivers/base/dd.c:1202
 #4: ffff88805f3e01d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #4: ffff88805f3e01d8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
 #4: ffff88805f3e01d8 (&dev->mutex){....}-{4:4}, at: device_driver_attach+0xd5/0x1d0 drivers/base/dd.c:1202

stack backtrace:
CPU: 0 UID: 0 PID: 5954 Comm: syz.4.42 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_held_locks_bug+0x82/0x90 kernel/locking/lockdep.c:6752
 try_to_freeze include/linux/freezer.h:62 [inline]
 usermodehelper_read_trylock+0x207/0x2c0 kernel/umh.c:230
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:147 [inline]
 firmware_fallback_sysfs+0x16e/0xa40 drivers/base/firmware_loader/fallback.c:238
 _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]
 emi26_load_firmware drivers/usb/misc/emi26.c:86 [inline]
 emi26_probe+0x16a/0x1690 drivers/usb/misc/emi26.c:232
 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
 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203
 bind_store+0x1d3/0x220 drivers/base/bus.c:267
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f73a381e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f73a1a55028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f73a3aa6090 RCX: 00007f73a381e0d9
RDX: 0000000000000008 RSI: 0000200000000200 RDI: 0000000000000005
RBP: 00007f73a38b5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f73a3aa6128 R14: 00007f73a3aa6090 R15: 00007fff62214c48
 </TASK>