Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 3 UID: 0 PID: 0 Comm: swapper/3 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:dummy_queue+0x1ba/0xb00 drivers/usb/gadget/udc/dummy_hcd.c:737
Code: 00 49 83 bc 24 c8 05 00 00 00 0f 84 a6 07 00 00 e8 fb ca 3c fa 49 8d 7f 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 4f 07 00 00 45 8b 7f 60 31 ff
RSP: 0018:ffffc900005e8d38 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888013d1a410 RCX: ffffffff87ccf58f
RDX: 000000000000000c RSI: ffffffff87ccf605 RDI: 0000000000000060
RBP: ffff8880220d00e0 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8880220d0c00
R13: ffff888013d1a400 R14: ffff8880220d00d8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888096ef3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000034223ffc CR3: 000000006d5c8000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 usb_ep_queue+0xfa/0x3c0 drivers/usb/gadget/udc/core.c:305
 eth_start_xmit+0x684/0x1390 drivers/usb/gadget/function/u_ether.c:579
 ncm_tx_timeout+0x7f/0xb0 drivers/usb/gadget/function/f_ncm.c:1161
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096
 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2113
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 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:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 75 8e 02 e9 83 4b 03 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d e3 8d 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc9000048fe00 EFLAGS: 00000206
RAX: 00000000002c5569 RBX: ffff88801c7f2540 RCX: ffffffff8bb81335
RDX: 0000000000000000 RSI: ffffffff8e1a2693 RDI: ffffffff8c3fe580
RBP: ffffed10038fe4a8 R08: 0000000000000001 R09: ffffed10056a678d
R10: ffff88802b533c6b R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff92000091fc4 R15: dffffc0000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
 default_idle+0x9/0x10 arch/x86/kernel/process.c:768
 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x3a7/0x5b0 kernel/sched/idle.c:355
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454
 start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x158
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_queue+0x1ba/0xb00 drivers/usb/gadget/udc/dummy_hcd.c:737
Code: 00 49 83 bc 24 c8 05 00 00 00 0f 84 a6 07 00 00 e8 fb ca 3c fa 49 8d 7f 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 4f 07 00 00 45 8b 7f 60 31 ff
RSP: 0018:ffffc900005e8d38 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888013d1a410 RCX: ffffffff87ccf58f
RDX: 000000000000000c RSI: ffffffff87ccf605 RDI: 0000000000000060
RBP: ffff8880220d00e0 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8880220d0c00
R13: ffff888013d1a400 R14: ffff8880220d00d8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888096ef3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000034223ffc CR3: 000000006d5c8000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	00 49 83             	add    %cl,-0x7d(%rcx)
   3:	bc 24 c8 05 00       	mov    $0x5c824,%esp
   8:	00 00                	add    %al,(%rax)
   a:	0f 84 a6 07 00 00    	je     0x7b6
  10:	e8 fb ca 3c fa       	call   0xfa3ccb10
  15:	49 8d 7f 60          	lea    0x60(%r15),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 08                	je     0x3a
  32:	3c 03                	cmp    $0x3,%al
  34:	0f 8e 4f 07 00 00    	jle    0x789
  3a:	45 8b 7f 60          	mov    0x60(%r15),%r15d
  3e:	31 ff                	xor    %edi,%edi