------------[ cut here ]------------
usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
WARNING: drivers/usb/gadget/udc/core.c:125 at usb_ep_enable+0x148/0x480 drivers/usb/gadget/udc/core.c:124, CPU#0: kworker/0:0/9
Modules linked in:
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 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: usb_hub_wq hub_event
RIP: 0010:usb_ep_enable+0x1bc/0x480 drivers/usb/gadget/udc/core.c:124
Code: 7a 7a 67 fa 49 83 3f 00 48 c7 c0 a0 d0 f4 8c 49 c7 c0 c0 d0 f4 8c 4c 0f 44 c0 4c 89 f7 48 c7 c6 2f 96 94 8e 44 89 ea 4c 89 e1 <67> 48 0f b9 3a bd ea ff ff ff 0f 1f 44 00 00 e8 90 74 ee f9 65 8b
RSP: 0018:ffffc90000007910 EFLAGS: 00010086
RAX: ffffffff8cf4d0a0 RBX: ffff888035b340e0 RCX: ffffffff8cf4ef80
RDX: 0000000000000081 RSI: ffffffff8e94962f RDI: ffffffff91cc2a90
RBP: dffffc0000000000 R08: ffffffff8cf4d0c0 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000100 R12: ffffffff8cf4ef80
R13: 0000000000000081 R14: ffffffff91cc2a90 R15: ffff888035b340f8
FS:  0000000000000000(0000) GS:ffff88808a9fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7aa5f285e0 CR3: 00000000344da000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 hidg_set_alt+0x12a/0xa60 drivers/usb/gadget/function/f_hid.c:1042
 set_config+0x749/0x1160 drivers/usb/gadget/composite.c:1018
 composite_setup+0x1de7/0x3480 drivers/usb/gadget/composite.c:1901
 configfs_composite_setup+0xc7/0x100 drivers/usb/gadget/configfs.c:1877
 dummy_timer+0x2f30/0x4ce0 drivers/usb/gadget/udc/dummy_hcd.c:1983
 __run_hrtimer kernel/time/hrtimer.c:2079 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2136
 hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2153
 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
 __do_softirq kernel/softirq.c:703 [inline]
 invoke_softirq kernel/softirq.c:542 [inline]
 __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:809
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221
Code: f7 e8 6d 9f 9a f5 f7 c3 00 02 00 00 74 05 e8 20 52 c7 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> a4 93 8b f5 65 48 8b 05 ac 01 d8 08 48 85 c0 74 18 5b 41 5e c3
RSP: 0018:ffffc9000022ef50 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 8000000000000001
RDX: 0000000000000006 RSI: ffffffff8e6add33 RDI: 0000000000000001
RBP: 0000000000000007 R08: ffffffff91be2abf R09: 1ffffffff237c557
R10: dffffc0000000000 R11: fffffbfff237c558 R12: 1ffff11006944c95
R13: dffffc0000000000 R14: ffff888035b34000 R15: 0000000000000000
 spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
 dummy_urb_enqueue+0x5a2/0x7a0 drivers/usb/gadget/udc/dummy_hcd.c:1369
 usb_hcd_submit_urb+0x328/0x1b60 drivers/usb/core/hcd.c:1542
 usb_start_wait_urb+0x13f/0x5b0 drivers/usb/core/message.c:62
 usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
 usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
 usb_control_msg_send drivers/usb/core/message.c:226 [inline]
 usb_set_configuration+0x12c5/0x2260 drivers/usb/core/message.c:2221
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:707
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:869
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:899
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1027
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2bd/0x430 drivers/base/dd.c:1131
 device_initial_probe+0x9c/0x100 drivers/base/dd.c:1190
 __bus_probe_device+0x126/0x220 drivers/base/bus.c:614
 device_add+0x7d7/0xb80 drivers/base/core.c:3778
 usb_new_device+0x9aa/0x1690 drivers/usb/core/hub.c:2713
 hub_port_connect drivers/usb/core/hub.c:5585 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
 port_event drivers/usb/core/hub.c:5889 [inline]
 hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5971
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 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>
----------------
Code disassembly (best guess):
   0:	7a 7a                	jp     0x7c
   2:	67 fa                	addr32 cli
   4:	49 83 3f 00          	cmpq   $0x0,(%r15)
   8:	48 c7 c0 a0 d0 f4 8c 	mov    $0xffffffff8cf4d0a0,%rax
   f:	49 c7 c0 c0 d0 f4 8c 	mov    $0xffffffff8cf4d0c0,%r8
  16:	4c 0f 44 c0          	cmove  %rax,%r8
  1a:	4c 89 f7             	mov    %r14,%rdi
  1d:	48 c7 c6 2f 96 94 8e 	mov    $0xffffffff8e94962f,%rsi
  24:	44 89 ea             	mov    %r13d,%edx
  27:	4c 89 e1             	mov    %r12,%rcx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	bd ea ff ff ff       	mov    $0xffffffea,%ebp
  34:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  39:	e8 90 74 ee f9       	call   0xf9ee74ce
  3e:	65                   	gs
  3f:	8b                   	.byte 0x8b