misc raw-gadget: fail, usb_gadget_register_driver returned -16
------------[ cut here ]------------
percpu ref (free_ioctx_reqs) <= 0 (0) after switching to atomic
WARNING: lib/percpu-refcount.c:197 at percpu_ref_switch_to_atomic_rcu+0x3cc/0x480, CPU#1: syz-executor.4/4121
Modules linked in:
CPU: 1 UID: 0 PID: 4121 Comm: syz-executor.4 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
RIP: 0010:percpu_ref_switch_to_atomic_rcu+0x3cc/0x480
Code: 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 9e 00 00 00 49 8b 75 e8 48 c7 c7 c0 99 e2 84 e8 25 ac e9 fe 90 <0f> 0b 90 90 e9 2b ff ff ff e8 56 de 5f ff e9 9e fe ff ff e8 dc de
RSP: 0018:ffff88806cf08e20 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8139de70
RDX: ffff8880141f3700 RSI: ffffffff8139de7e RDI: 0000000000000001
RBP: 8000000000000000 R08: 0000000000000001 R09: ffffed100d9e4801
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800d516080
R13: ffff88800d5160a0 R14: 0000000000000002 R15: 0000000000000003
FS:  00005555853c3400(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3430c8c544 CR3: 000000003cd24000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rcu_core+0x7c8/0x1800
 handle_softirqs+0x1b1/0x770
 __irq_exit_rcu+0xc4/0x100
misc raw-gadget: fail, usb_gadget_register_driver returned -16
 irq_exit_rcu+0x9/0x20
 sysvec_apic_timer_interrupt+0x70/0x80
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x34/0x50
Code: c7 18 53 48 89 f3 48 8b 74 24 10 e8 16 a5 93 fc 48 89 ef e8 4e f0 93 fc 80 e7 02 74 06 e8 e4 07 be fc fb 65 ff 0d 6c 4c c6 02 <74> 07 5b 5d e9 33 23 00 00 0f 1f 44 00 00 5b 5d e9 27 23 00 00 0f
RSP: 0018:ffff888016c77de0 EFLAGS: 00000286
RAX: 0000000000000085 RBX: 0000000000000286 RCX: ffffffff817c3ab6
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84be33bc
RBP: ffffffff85d09560 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8643b457 R11: 0000000000000001 R12: ffff88801ba4c400
R13: 0000000000001000 R14: 0000000000000001 R15: 0000000000000286
 __create_object+0x59/0x80
 kmem_cache_alloc_noprof+0x414/0x690
 getname_flags.part.0+0x48/0x540
 getname_flags+0x95/0xe0
 __x64_sys_symlink+0x58/0x90
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3430c0c427
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff5bb99538 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3430c0c427
RDX: 00007fff5bb99617 RSI: 00007f3430c67019 RDI: 00007fff5bb99600
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff5bb993d0
R10: 00007fff5bb99287 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff5bb99600
 </TASK>
irq event stamp: 796
hardirqs last  enabled at (804): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (813): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (0): [<ffffffff81395ed8>] copy_process+0x1e58/0x73c0
softirqs last disabled at (135): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
percpu_ref_switch_to_atomic_rcu: percpu_ref_switch_to_atomic_rcu(): percpu_ref underflow slab kmalloc-64 start ffff88800d516080 pointer offset 0 size 64
loop0: detected capacity change from 0 to 126
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	18 53 48             	sbb    %dl,0x48(%rbx)
   3:	89 f3                	mov    %esi,%ebx
   5:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
   a:	e8 16 a5 93 fc       	callq  0xfc93a525
   f:	48 89 ef             	mov    %rbp,%rdi
  12:	e8 4e f0 93 fc       	callq  0xfc93f065
  17:	80 e7 02             	and    $0x2,%bh
  1a:	74 06                	je     0x22
  1c:	e8 e4 07 be fc       	callq  0xfcbe0805
  21:	fb                   	sti
  22:	65 ff 0d 6c 4c c6 02 	decl   %gs:0x2c64c6c(%rip)        # 0x2c64c95
* 29:	74 07                	je     0x32 <-- trapping instruction
  2b:	5b                   	pop    %rbx
  2c:	5d                   	pop    %rbp
  2d:	e9 33 23 00 00       	jmpq   0x2365
  32:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  37:	5b                   	pop    %rbx
  38:	5d                   	pop    %rbp
  39:	e9 27 23 00 00       	jmpq   0x2365
  3e:	0f                   	.byte 0xf