------------[ 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/0:4/4708
Modules linked in:
CPU: 0 UID: 0 PID: 4708 Comm: kworker/0:4 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: 1a 8f 74 fa 49 83 3f 00 48 c7 c0 20 68 d3 8c 49 c7 c0 40 68 d3 8c 4c 0f 44 c0 4c 89 f7 48 c7 c6 0d 0d 6b 8e 44 89 ea 4c 89 e1 <67> 48 0f b9 3a bd ea ff ff ff 0f 1f 44 00 00 e8 a0 e8 02 fa 65 8b
RSP: 0018:ffffc90000007910 EFLAGS: 00010082
RAX: ffffffff8cd36820 RBX: ffff8880341180e0 RCX: ffffffff8cd38640
RDX: 0000000000000081 RSI: ffffffff8e6b0d0d RDI: ffffffff90886270
RBP: dffffc0000000000 R08: ffffffff8cd36840 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000100 R12: ffffffff8cd38640
R13: 0000000000000081 R14: ffffffff90886270 R15: ffff8880341180f8
FS:  0000000000000000(0000) GS:ffff88808c2c3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff2cdd3fb0 CR3: 00000000405f8000 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+0x2f43/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:1951
 __run_hrtimer kernel/time/hrtimer.c:2074 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2131
 hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2148
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 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 2d 48 b9 f5 f7 c3 00 02 00 00 74 05 e8 a0 a3 e5 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> 94 55 aa f5 65 48 8b 05 0c 41 ab 07 48 85 c0 74 18 5b 41 5e e9
RSP: 0018:ffffc90002bbef50 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 8000000000000001
RDX: 0000000000000006 RSI: ffffffff8e418399 RDI: 0000000000000001
RBP: 0000000000000007 R08: ffffffff907a727f R09: 1ffffffff20f4e4f
R10: dffffc0000000000 R11: fffffbfff20f4e50 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888034118000 R15: 1ffff11003f4b294
 spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
 dummy_urb_enqueue+0x587/0x780 drivers/usb/gadget/udc/dummy_hcd.c:1337
 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+0x12b1/0x2180 drivers/usb/core/message.c:2209
 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: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:3776
 usb_new_device+0x9aa/0x1690 drivers/usb/core/hub.c:2708
 hub_port_connect drivers/usb/core/hub.c:5580 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5720 [inline]
 port_event drivers/usb/core/hub.c:5884 [inline]
 hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5966
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 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), 2 bytes skipped:
   0:	74 fa                	je     0xfffffffc
   2:	49 83 3f 00          	cmpq   $0x0,(%r15)
   6:	48 c7 c0 20 68 d3 8c 	mov    $0xffffffff8cd36820,%rax
   d:	49 c7 c0 40 68 d3 8c 	mov    $0xffffffff8cd36840,%r8
  14:	4c 0f 44 c0          	cmove  %rax,%r8
  18:	4c 89 f7             	mov    %r14,%rdi
  1b:	48 c7 c6 0d 0d 6b 8e 	mov    $0xffffffff8e6b0d0d,%rsi
  22:	44 89 ea             	mov    %r13d,%edx
  25:	4c 89 e1             	mov    %r12,%rcx
* 28:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2d:	bd ea ff ff ff       	mov    $0xffffffea,%ebp
  32:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  37:	e8 a0 e8 02 fa       	call   0xfa02e8dc
  3c:	65                   	gs
  3d:	8b                   	.byte 0x8b