BUG: kernel NULL pointer dereference, address: 0000000000000651
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 8000000042d37067 P4D 8000000042d37067 PUD 0 
Oops: Oops: 0002 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 21078 Comm: syz.5.3776 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 00 ad 3d f8 4c 6b f3 64 49 8d 9f a8 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 9f 19 a1 f8 <4c> 89 33 eb 23 e8 d5 ac 3d f8 4d 8d b7 15 07 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc900001e0b98 EFLAGS: 00010246
RAX: 00000000000000ca RBX: 0000000000000651 RCX: ffff88802247b980
RDX: 0000000000000100 RSI: ffffffff8be33660 RDI: ffff888107cd5410
RBP: ffffc900001e0c90 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: ffffffff8981fd50 R12: 1ffff9200003c178
R13: ffff888107cd5410 R14: 0000000000000001 R15: 0000000000000001
FS:  00007feb1107a6c0(0000) GS:ffff8881a3c1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000651 CR3: 0000000020d90000 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 cb c6 4a f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 43 6f 13 f6 65 8b 05 0c d2 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000324f5e0 EFLAGS: 00000206
RAX: 48eeec8975979700 RBX: 0000000000000a02 RCX: 48eeec8975979700
RDX: 0000000000000000 RSI: ffffffff8be33660 RDI: 0000000000000001
RBP: ffffc9000324f670 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: dffffc0000000000
R13: ffff88811ff4dc40 R14: ffff88811ff4dc00 R15: 1ffff92000649ebc
 __wake_up_common_lock+0x190/0x1f0
 __unix_dgram_recvmsg+0x486/0xd60
 sock_recvmsg_nosec+0x186/0x1c0
 ____sys_recvmsg+0x3aa/0x460
 ___sys_recvmsg+0x1b5/0x510
 do_recvmmsg+0x307/0x770
 __x64_sys_recvmmsg+0x190/0x240
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feb1018ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007feb1107a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007feb103c6090 RCX: 00007feb1018ebe9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000008
RBP: 00007feb10211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007feb103c6128 R14: 00007feb103c6090 R15: 00007ffdd1d265a8
 </TASK>
Modules linked in:
CR2: 0000000000000651
---[ end trace 0000000000000000 ]---
RIP: 0010:llc_ui_setsockopt+0x4e1/0x5f0
Code: a1 f8 eb 4b e8 00 ad 3d f8 4c 6b f3 64 49 8d 9f a8 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 9f 19 a1 f8 <4c> 89 33 eb 23 e8 d5 ac 3d f8 4d 8d b7 15 07 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc900001e0b98 EFLAGS: 00010246
RAX: 00000000000000ca RBX: 0000000000000651 RCX: ffff88802247b980
RDX: 0000000000000100 RSI: ffffffff8be33660 RDI: ffff888107cd5410
RBP: ffffc900001e0c90 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: ffffffff8981fd50 R12: 1ffff9200003c178
R13: ffff888107cd5410 R14: 0000000000000001 R15: 0000000000000001
FS:  00007feb1107a6c0(0000) GS:ffff8881a3c1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000651 CR3: 0000000020d90000 CR4: 00000000000006f0
