BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 0 P4D 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 124 Comm: kworker/0:2 Tainted: G        W         5.4.274-syzkaller-00016-gdd432c37afcd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events linkwatch_event
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881ee779f80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e748f1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9d38
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e748f1c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e41fd000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:538 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:console_unlock+0xa62/0xfa0 kernel/printk/printk.c:2527
Code: 03 84 db 4c 8d ac 24 00 01 00 00 0f 85 13 05 00 00 e8 52 e5 16 00 e8 5d 5f 00 00 48 8b 44 24 20 48 89 44 24 70 ff 74 24 70 9d <e9> 99 f7 ff ff e8 34 e5 16 00 48 c7 05 c9 76 9e 05 00 00 00 00 e9
RSP: 0018:ffff8881ee037740 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 0000000000000000 RCX: ffff8881ee779f80
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8881ee0378f0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881ee037840 R14: 0000000000000000 R15: ffffffff812eeb30
 vprintk_emit+0x1e0/0x3f0 kernel/printk/printk.c:2032
 printk+0xd1/0x111 kernel/printk/printk.c:2092
 addrconf_notify+0x943/0xe50 net/ipv6/addrconf.c:3636
 notifier_call_chain kernel/notifier.c:98 [inline]
 __raw_notifier_call_chain kernel/notifier.c:399 [inline]
 raw_notifier_call_chain+0x95/0x110 kernel/notifier.c:406
 call_netdevice_notifiers_info net/core/dev.c:1670 [inline]
 netdev_state_change+0x146/0x1e0 net/core/dev.c:1273
 linkwatch_do_dev+0xfc/0x130 net/core/link_watch.c:159
 __linkwatch_run_queue+0x4cc/0x7f0 net/core/link_watch.c:205
 linkwatch_event+0x48/0x50 net/core/link_watch.c:244
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
CR2: 0000000000000000
---[ end trace cdd78d0ca2ed1ca1 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881ee779f80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e748f1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9d38
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e748f1c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e41fd000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 84 db 4c 8d ac 24 	add    0x24ac8d4c(%rbx,%rbx,8),%eax
   7:	00 01                	add    %al,(%rcx)
   9:	00 00                	add    %al,(%rax)
   b:	0f 85 13 05 00 00    	jne    0x524
  11:	e8 52 e5 16 00       	call   0x16e568
  16:	e8 5d 5f 00 00       	call   0x5f78
  1b:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
  20:	48 89 44 24 70       	mov    %rax,0x70(%rsp)
  25:	ff 74 24 70          	push   0x70(%rsp)
  29:	9d                   	popf
* 2a:	e9 99 f7 ff ff       	jmp    0xfffff7c8 <-- trapping instruction
  2f:	e8 34 e5 16 00       	call   0x16e568
  34:	48 c7 05 c9 76 9e 05 	movq   $0x0,0x59e76c9(%rip)        # 0x59e7708
  3b:	00 00 00 00
  3f:	e9                   	.byte 0xe9