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: 9 Comm: kworker/u4:1 Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound linkwatch_event
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881f5dc4ec0
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ea8431c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffa310
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ea8431c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ecdd0000 CR4: 00000000003406b0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 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+0x9ea/0xe80 kernel/printk/printk.c:2527
Code: 64 56 86 e8 48 73 e1 02 f6 c3 01 48 8b 5c 24 28 0f 85 61 04 00 00 e8 55 f9 15 00 e8 80 5a 00 00 48 89 5c 24 70 ff 74 24 70 9d <e9> d0 f7 ff ff e8 3c f9 15 00 48 c7 05 d1 d7 0c 05 00 00 00 00 e9
RSP: 0018:ffff8881f5dcf680 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff8149e019 RBX: 0000000000000293 RCX: ffff8881f5dc4ec0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff
RBP: ffff8881f5dcf830 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ebb9ec0 R11: 1ffff1103ebb9ec0 R12: 0000000000000000
R13: ffffffff85eefb30 R14: ffffffff8267bbc0 R15: dffffc0000000000
 vprintk_emit+0x1be/0x380 kernel/printk/printk.c:2032
 vprintk_default+0x28/0x30 kernel/printk/printk.c:2059
 vprintk_func+0x19a/0x1e0 kernel/printk/printk_safe.c:393
 printk+0xcc/0x110 kernel/printk/printk.c:2092
 addrconf_notify+0x96b/0xeb0 net/ipv6/addrconf.c:3638
 notifier_call_chain kernel/notifier.c:98 [inline]
 __raw_notifier_call_chain kernel/notifier.c:399 [inline]
 raw_notifier_call_chain+0xa0/0x120 kernel/notifier.c:406
 call_netdevice_notifiers_info net/core/dev.c:1670 [inline]
 netdev_state_change+0x102/0x1a0 net/core/dev.c:1273
 linkwatch_do_dev+0x102/0x140 net/core/link_watch.c:159
 __linkwatch_run_queue+0x412/0x7e0 net/core/link_watch.c:205
 linkwatch_event+0x4c/0x60 net/core/link_watch.c:244
 process_one_work+0x73b/0xcc0 kernel/workqueue.c:2290
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0xd82/0x13b0 kernel/workqueue.c:2438
 kthread+0x31e/0x3a0 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
CR2: 0000000000000000
---[ end trace 6a556a518e42a178 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881f5dc4ec0
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ea8431c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffa310
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ea8431c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ecdd0000 CR4: 00000000003406b0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	64 56                	fs push %rsi
   2:	86 e8                	xchg   %ch,%al
   4:	48 73 e1             	rex.W jae 0xffffffe8
   7:	02 f6                	add    %dh,%dh
   9:	c3                   	ret
   a:	01 48 8b             	add    %ecx,-0x75(%rax)
   d:	5c                   	pop    %rsp
   e:	24 28                	and    $0x28,%al
  10:	0f 85 61 04 00 00    	jne    0x477
  16:	e8 55 f9 15 00       	call   0x15f970
  1b:	e8 80 5a 00 00       	call   0x5aa0
  20:	48 89 5c 24 70       	mov    %rbx,0x70(%rsp)
  25:	ff 74 24 70          	push   0x70(%rsp)
  29:	9d                   	popf
* 2a:	e9 d0 f7 ff ff       	jmp    0xfffff7ff <-- trapping instruction
  2f:	e8 3c f9 15 00       	call   0x15f970
  34:	48 c7 05 d1 d7 0c 05 	movq   $0x0,0x50cd7d1(%rip)        # 0x50cd810
  3b:	00 00 00 00
  3f:	e9                   	.byte 0xe9