BUG: kernel NULL pointer dereference, address: 0000000000000648
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: Oops: 0002 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc7-syzkaller-01993-ge3f96b3556e4 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:llc_ui_setsockopt+0x4e1/0x5f0 net/llc/af_llc.c:-1
Code: ac f8 eb 4b e8 00 a0 4a f8 4c 6b f3 64 49 8d 9f a0 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 6f b0 ac f8 <4c> 89 33 eb 23 e8 d5 9f 4a f8 4d 8d b7 0d 07 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc90000007b98 EFLAGS: 00010246
RAX: 00000000000000c9 RBX: 0000000000000648 RCX: ffffffff8de95280
RDX: 0000000000000100 RSI: ffffffff8be28ce0 RDI: ffff88807a4fe810
RBP: ffffc90000007c90 R08: ffffffff8fa1f6f7 R09: 1ffffffff1f43ede
R10: dffffc0000000000 R11: ffffffff89758750 R12: 1ffff92000000f78
R13: ffff88807a4fe810 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000648 CR3: 000000000df38000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 93 de 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 0d 1b 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8de07d80 EFLAGS: 000002c2
RAX: 21f33c71c2a1ca00 RBX: ffffffff81976a18 RCX: 21f33c71c2a1ca00
RDX: 0000000000000001 RSI: ffffffff8d99988c RDI: ffffffff8be28d00
RBP: ffffffff8de07ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb
R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fa1f6f0
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a50
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:749
 default_idle_call+0x74/0xb0 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x1e8/0x510 kernel/sched/idle.c:325
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:423
 rest_init+0x2de/0x300 init/main.c:745
 start_kernel+0x47d/0x500 init/main.c:1102
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:307
 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:288
 common_startup_64+0x13e/0x147
 </TASK>
Modules linked in:
CR2: 0000000000000648
---[ end trace 0000000000000000 ]---
RIP: 0010:llc_ui_setsockopt+0x4e1/0x5f0 net/llc/af_llc.c:-1
Code: ac f8 eb 4b e8 00 a0 4a f8 4c 6b f3 64 49 8d 9f a0 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 6f b0 ac f8 <4c> 89 33 eb 23 e8 d5 9f 4a f8 4d 8d b7 0d 07 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc90000007b98 EFLAGS: 00010246
RAX: 00000000000000c9 RBX: 0000000000000648 RCX: ffffffff8de95280
RDX: 0000000000000100 RSI: ffffffff8be28ce0 RDI: ffff88807a4fe810
RBP: ffffc90000007c90 R08: ffffffff8fa1f6f7 R09: 1ffffffff1f43ede
R10: dffffc0000000000 R11: ffffffff89758750 R12: 1ffff92000000f78
R13: ffff88807a4fe810 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000648 CR3: 000000000df38000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	ac                   	lods   %ds:(%rsi),%al
   1:	f8                   	clc
   2:	eb 4b                	jmp    0x4f
   4:	e8 00 a0 4a f8       	call   0xf84aa009
   9:	4c 6b f3 64          	imul   $0x64,%rbx,%r14
   d:	49 8d 9f a0 06 00 00 	lea    0x6a0(%r15),%rbx
  14:	48 89 d8             	mov    %rbx,%rax
  17:	48 c1 e8 03          	shr    $0x3,%rax
  1b:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  20:	74 08                	je     0x2a
  22:	48 89 df             	mov    %rbx,%rdi
  25:	e8 6f b0 ac f8       	call   0xf8acb099
* 2a:	4c 89 33             	mov    %r14,(%rbx) <-- trapping instruction
  2d:	eb 23                	jmp    0x52
  2f:	e8 d5 9f 4a f8       	call   0xf84aa009
  34:	4d 8d b7 0d 07 00 00 	lea    0x70d(%r15),%r14
  3b:	4c 89 f0             	mov    %r14,%rax
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1