usb 5-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2
usb 5-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw
------------[ cut here ]------------
!atomic_read(&kn->count)
WARNING: fs/kernfs/dir.c:537 at kernfs_get.part.0+0x6e/0x80 fs/kernfs/dir.c:537, CPU#0: kworker/0:10/6307
Modules linked in:
CPU: 0 UID: 0 PID: 6307 Comm: kworker/0:10 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get.part.0+0x6e/0x80 fs/kernfs/dir.c:537
Code: d8 6e 52 ff 85 ed 74 1c e8 1f 74 52 ff be 04 00 00 00 48 89 df e8 12 dd bd ff f0 ff 03 5b 5d e9 88 18 cb 08 e8 03 74 52 ff 90 <0f> 0b 90 eb d9 48 89 df e8 25 d7 bd ff eb c0 0f 1f 00 90 90 90 90
RSP: 0018:ffffc900048f77a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888053202870 RCX: ffffffff82b4c0f8
RDX: ffff888032c32480 RSI: ffffffff82b4c11d RDI: ffff888032c32480
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88802c6381b0 R14: 0000000000000000 R15: ffff88802c6381a8
FS:  0000000000000000(0000) GS:ffff8880d63a8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2db39e96c0 CR3: 00000000562d7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kernfs_get+0x1f/0x30 fs/kernfs/dir.c:536
 sysfs_get include/linux/sysfs.h:802 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x359/0x930 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x16a/0x1e0 lib/kobject.c:426
 class_dir_create_and_add drivers/base/core.c:3232 [inline]
 get_device_parent+0x382/0x4c0 drivers/base/core.c:3283
 device_add+0x1ad/0x1950 drivers/base/core.c:3613
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline]
 firmware_fallback_sysfs+0x2e2/0xc20 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xfd7/0x13c0 drivers/base/firmware_loader/main.c:898
 request_firmware_work_func+0xea/0x250 drivers/base/firmware_loader/main.c:1150
 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>