BUG: kernel NULL pointer dereference, address: 0000000000000649
#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: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:llc_ui_setsockopt+0x4e1/0x5f0
Code: a1 f8 eb 4b e8 c0 dc 3d 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 df 46 a1 f8 <4c> 89 33 eb 23 e8 95 dc 3d f8 4d 8d b7 0d 07 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc900001e0b98 EFLAGS: 00010246
RAX: 00000000000000c9 RBX: 0000000000000649 RCX: ffff888100680000
RDX: 0000000000000100 RSI: ffffffff8be33660 RDI: ffff888107e11410
RBP: ffffc900001e0c90 R08: ffffffff8fa38437 R09: 1ffffffff1f47086
R10: dffffc0000000000 R11: ffffffff8981cd90 R12: 1ffff9200003c178
R13: ffff888107e11410 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000649 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0x13/0x20
Code: 53 e7 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 eb 07 0f 00 2d f3 96 0e 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:ffffc90000177de0 EFLAGS: 00000282
RAX: 739e6e6faaa3eb00 RBX: ffffffff819683b8 RCX: 739e6e6faaa3eb00
RDX: 0000000000000001 RSI: ffffffff8be33660 RDI: ffffffff819683b8
RBP: ffffc90000177f20 R08: ffff888136632f9b R09: 1ffff11026cc65f3
R10: dffffc0000000000 R11: ffffed1026cc65f4 R12: ffffffff8fa38430
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110200d0000
 default_idle+0x13/0x20
 default_idle_call+0x74/0xb0
 do_idle+0x1e8/0x510
 cpu_startup_entry+0x44/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x147
 </TASK>
Modules linked in:
CR2: 0000000000000649
---[ end trace 0000000000000000 ]---
RIP: 0010:llc_ui_setsockopt+0x4e1/0x5f0
Code: a1 f8 eb 4b e8 c0 dc 3d 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 df 46 a1 f8 <4c> 89 33 eb 23 e8 95 dc 3d f8 4d 8d b7 0d 07 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc900001e0b98 EFLAGS: 00010246
RAX: 00000000000000c9 RBX: 0000000000000649 RCX: ffff888100680000
RDX: 0000000000000100 RSI: ffffffff8be33660 RDI: ffff888107e11410
RBP: ffffc900001e0c90 R08: ffffffff8fa38437 R09: 1ffffffff1f47086
R10: dffffc0000000000 R11: ffffffff8981cd90 R12: 1ffff9200003c178
R13: ffff888107e11410 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000649 CR3: 000000000df36000 CR4: 00000000000006f0
