------------[ cut here ]------------
usb_ep_enable: ep134 (ep6in-bulk) has maxpacket 0
WARNING: drivers/usb/gadget/udc/core.c:124 at usb_ep_enable+0x3e6/0x490 drivers/usb/gadget/udc/core.c:124, CPU#1: udevd/5202
Modules linked in:
CPU: 1 UID: 0 PID: 5202 Comm: udevd 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
RIP: 0010:usb_ep_enable+0x3f8/0x490 drivers/usb/gadget/udc/core.c:124
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 93 00 00 00 48 8d 3d 8a 3f 86 0a 48 8b 4b 08 40 0f b6 d5 4d 89 e0 48 c7 c6 60 c0 fb 8c <67> 48 0f b9 3a bd ea ff ff ff e9 8e fd ff ff 49 c7 c4 00 b3 fb 8c
RSP: 0018:ffffc900005a0a10 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff888024074248 RCX: ffffffff8cfbf820
RDX: 0000000000000086 RSI: ffffffff8cfbc060 RDI: ffffffff92787580
RBP: 0000000000000086 R08: ffffffff8cfbb340 R09: 0000000000000000
R10: ffffffff926aef5f R11: 0000000000000001 R12: ffffffff8cfbb340
R13: 0000000000000000 R14: ffff888024074248 R15: ffff888027ae17a0
FS:  00007f3725832880(0000) GS:ffff888095379000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f756952b6b0 CR3: 000000004f921000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 hidg_set_alt+0x190/0xa10 drivers/usb/gadget/function/f_hid.c:1042
 set_config drivers/usb/gadget/composite.c:1018 [inline]
 composite_setup+0x2ccf/0x9290 drivers/usb/gadget/composite.c:1901
 configfs_composite_setup+0xfb/0x130 drivers/usb/gadget/configfs.c:1877
 dummy_timer+0x20a0/0x3840 drivers/usb/gadget/udc/dummy_hcd.c:1983
 __run_hrtimer kernel/time/hrtimer.c:2079 [inline]
 __hrtimer_run_queues+0x448/0x9a0 kernel/time/hrtimer.c:2136
 hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2153
 handle_softirqs+0x216/0xa20 kernel/softirq.c:669
 __do_softirq kernel/softirq.c:703 [inline]
 invoke_softirq kernel/softirq.c:542 [inline]
 __irq_exit_rcu+0x178/0x220 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+0xa3/0xc0 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:__fget_light fs/file.c:1343 [inline]
RIP: 0010:fdget+0x7a/0x210 fs/file.c:1357
Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 49 01 00 00 44 8b 23 <bf> 01 00 00 00 44 89 e6 e8 c9 66 67 ff 41 83 fc 01 0f 85 08 01 00
RSP: 0018:ffffc9000303fdf0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff8880286730c0 RCX: ffffffff82a65f8d
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880286730c0
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffed10050ce618
R10: ffff8880286730c3 R11: 0000000000000000 R12: 0000000000000001
R13: 000000000000002f R14: 00007ffffb5ca7a0 R15: ffffc9000303fe38
 class_fd_constructor include/linux/file.h:84 [inline]
 __sys_recvmsg net/socket.c:3002 [inline]
 __do_sys_recvmsg net/socket.c:3016 [inline]
 __se_sys_recvmsg net/socket.c:3013 [inline]
 __x64_sys_recvmsg+0x100/0x260 net/socket.c:3013
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x121/0x770 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f37250a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffffb5ca710 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f3725832880 RCX: 00007f37250a7407
RDX: 0000000000000000 RSI: 00007ffffb5ca7a0 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000056337090e9e0
R13: 00007ffffb5ca860 R14: 00007ffffb5ca7ac R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 93 00 00 00    	jne    0xa4
  11:	48 8d 3d 8a 3f 86 0a 	lea    0xa863f8a(%rip),%rdi        # 0xa863fa2
  18:	48 8b 4b 08          	mov    0x8(%rbx),%rcx
  1c:	40 0f b6 d5          	movzbl %bpl,%edx
  20:	4d 89 e0             	mov    %r12,%r8
  23:	48 c7 c6 60 c0 fb 8c 	mov    $0xffffffff8cfbc060,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	bd ea ff ff ff       	mov    $0xffffffea,%ebp
  34:	e9 8e fd ff ff       	jmp    0xfffffdc7
  39:	49 c7 c4 00 b3 fb 8c 	mov    $0xffffffff8cfbb300,%r12