Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 2 UID: 0 PID: 0 Comm: swapper/2 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:gb_operation_message_init drivers/greybus/operation.c:340 [inline]
RIP: 0010:gb_operation_message_alloc+0x186/0x2c0 drivers/greybus/operation.c:385
Code: 00 e8 0e a2 dc f8 41 80 fd 7f 0f 84 b9 00 00 00 e8 ef a7 dc f8 48 89 ea 41 83 c4 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e b8 00 00 00 48 8d 7d 02 66 44
RSP: 0018:ffffc900005489f0 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88806bf82ec0 RCX: 0000000000000101
RDX: 0000000000000002 RSI: ffffffff892efa81 RDI: ffff88801df02580
RBP: 0000000000000010 R08: 0000000000000001 R09: 000000000000007f
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000800 R15: 0000000000000018
FS:  0000000000000000(0000) GS:ffff88809594a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000800004c0 CR3: 000000006ced0000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 gb_operation_create_common+0x9f/0x710 drivers/greybus/operation.c:532
 gb_operation_create_incoming drivers/greybus/operation.c:644 [inline]
 gb_connection_recv_request drivers/greybus/operation.c:926 [inline]
 gb_connection_recv+0x1dc/0x1050 drivers/greybus/operation.c:1063
 greybus_data_rcvd+0x244/0x600 drivers/greybus/connection.c:89
 cport_in_callback+0x1fb/0x280 drivers/greybus/es2.c:840
 __usb_hcd_giveback_urb+0x38e/0x610 drivers/usb/core/hcd.c:1657
 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
 dummy_timer+0xdaf/0x3820 drivers/usb/gadget/udc/dummy_hcd.c:2023
 __run_hrtimer kernel/time/hrtimer.c:2074 [inline]
 __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2131
 hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2148
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x16a/0x210 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+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:finish_task_switch.isra.0+0x2ca/0x10d0 kernel/sched/core.c:5384
Code: b6 0a 00 00 41 c7 87 20 0e 00 00 00 00 00 00 e9 47 04 00 00 49 8d 7f 48 e8 23 86 fe 09 e8 ce 24 3d 00 fb 48 8d bb 18 17 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84
RSP: 0018:ffffc9000048fc38 EFLAGS: 00000206
RAX: 000000000009c72b RBX: ffff88801df02580 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8e3e0f82 RDI: ffff88801df03c98
RBP: ffffc9000048fc90 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88804c430000
R13: 0000000000000001 R14: ffffffff9245c8e4 R15: ffff88802b23c040
 context_switch kernel/sched/core.c:5536 [inline]
 __schedule+0x1261/0x6920 kernel/sched/core.c:7284
 schedule_idle+0x54/0x80 kernel/sched/core.c:7402
 do_idle+0x365/0x5b0 kernel/sched/idle.c:384
 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:gb_operation_message_init drivers/greybus/operation.c:340 [inline]
RIP: 0010:gb_operation_message_alloc+0x186/0x2c0 drivers/greybus/operation.c:385
Code: 00 e8 0e a2 dc f8 41 80 fd 7f 0f 84 b9 00 00 00 e8 ef a7 dc f8 48 89 ea 41 83 c4 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e b8 00 00 00 48 8d 7d 02 66 44
RSP: 0018:ffffc900005489f0 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88806bf82ec0 RCX: 0000000000000101
RDX: 0000000000000002 RSI: ffffffff892efa81 RDI: ffff88801df02580
RBP: 0000000000000010 R08: 0000000000000001 R09: 000000000000007f
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000800 R15: 0000000000000018
FS:  0000000000000000(0000) GS:ffff88809594a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000800004c0 CR3: 000000006ced0000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e8 0e a2 dc f8       	call   0xf8dca213
   5:	41 80 fd 7f          	cmp    $0x7f,%r13b
   9:	0f 84 b9 00 00 00    	je     0xc8
   f:	e8 ef a7 dc f8       	call   0xf8dca803
  14:	48 89 ea             	mov    %rbp,%rdx
  17:	41 83 c4 08          	add    $0x8,%r12d
  1b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  22:	fc ff df
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	74 08                	je     0x39
  31:	3c 01                	cmp    $0x1,%al
  33:	0f 8e b8 00 00 00    	jle    0xf1
  39:	48 8d 7d 02          	lea    0x2(%rbp),%rdi
  3d:	66                   	data16
  3e:	44                   	rex.R