Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 UID: 0 PID: 15 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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 ae 95 97 fb 41 80 fd 7f 0f 84 b9 00 00 00 e8 8f 9b 97 fb 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:ffffc900000079f0 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff8881203ecec0 RCX: ffffc90001001000
RDX: 0000000000000002 RSI: ffffffff861d82c1 RDI: ffff888101ee9e40
RBP: 0000000000000010 R08: 0000000000000001 R09: 000000000000007f
R10: 0000000000000000 R11: ffffffff822027de R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000800 R15: 0000000000000018
FS:  0000000000000000(0000) GS:ffff8882683d7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa902776c0 CR3: 0000000109320000 CR4: 00000000003506f0
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+0x1d9/0x9b0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x168/0x210 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+0x8f/0xb0 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+0x31/0x80 kernel/locking/spinlock.c:221
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 b6 67 04 fa 48 89 df e8 3e be 04 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 75 02 f7 f9 65 48 83 3d b4 0e 98 05 00 74 16 5b
RSP: 0018:ffffc900000ffcb8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff944978e0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff892df1e1 RDI: ffffffff87d2bd80
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 205d353532355420 R12: 1ffff9200001ff9a
R13: ffffffff89ebc480 R14: 0000000000000001 R15: 0000000000000000
 nbcon_emit_one+0x15c/0x2b0 kernel/printk/nbcon.c:1165
 nbcon_kthread_func+0x613/0x7d0 kernel/printk/nbcon.c:1271
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 ae 95 97 fb 41 80 fd 7f 0f 84 b9 00 00 00 e8 8f 9b 97 fb 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:ffffc900000079f0 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff8881203ecec0 RCX: ffffc90001001000
RDX: 0000000000000002 RSI: ffffffff861d82c1 RDI: ffff888101ee9e40
RBP: 0000000000000010 R08: 0000000000000001 R09: 000000000000007f
R10: 0000000000000000 R11: ffffffff822027de R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000800 R15: 0000000000000018
FS:  0000000000000000(0000) GS:ffff8882683d7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa902776c0 CR3: 0000000109320000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	00 e8                	add    %ch,%al
   2:	ae                   	scas   %es:(%rdi),%al
   3:	95                   	xchg   %eax,%ebp
   4:	97                   	xchg   %eax,%edi
   5:	fb                   	sti
   6:	41 80 fd 7f          	cmp    $0x7f,%r13b
   a:	0f 84 b9 00 00 00    	je     0xc9
  10:	e8 8f 9b 97 fb       	call   0xfb979ba4
  15:	48 89 ea             	mov    %rbp,%rdx
  18:	41 83 c4 08          	add    $0x8,%r12d
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  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 01                	cmp    $0x1,%al
  34:	0f 8e b8 00 00 00    	jle    0xf2
  3a:	48 8d 7d 02          	lea    0x2(%rbp),%rdi
  3e:	66                   	data16
  3f:	44                   	rex.R