BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
PGD 8000000196e00067 P4D 8000000196e00067 PUD 196e04067 PMD 0 
Oops: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 2590 Comm: udevd Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid+0x66/0x450 lib/list_debug.c:23
RSP: 0000:ffff880196c1f4e0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88021fffab48 RDI: ffffea00073b5de0
RBP: ffff880196c1f548 R08: 00000000001348f8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffea00073b5de0 R14: 0000000000000008 R15: ffffffff8b58d000
FS:  00007fdeabeb17a0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 0000000196e46000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add include/linux/list.h:79 [inline]
 __free_one_page+0x1483/0x1800 mm/page_alloc.c:876
 free_one_page mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0x870/0x1680 mm/page_alloc.c:1260
 __free_pages+0x109/0x240 mm/page_alloc.c:4442
 kmsan_free_page+0x197/0x2e0 mm/kmsan/kmsan.c:959
 free_pages_prepare mm/page_alloc.c:996 [inline]
 __free_pages_ok+0x288/0x1680 mm/page_alloc.c:1254
 __free_pages mm/page_alloc.c:4442 [inline]
 free_pages+0x1e7/0x320 mm/page_alloc.c:4452
 _pgd_free arch/x86/mm/pgtable.c:367 [inline]
 pgd_free+0x2b2/0x360 arch/x86/mm/pgtable.c:416
 mm_free_pgd kernel/fork.c:551 [inline]
 __mmdrop+0x139/0x930 kernel/fork.c:599
 mmdrop+0xc2/0xd0 include/linux/sched/mm.h:49
 finish_task_switch+0x103/0x270 kernel/sched/core.c:2743
 context_switch kernel/sched/core.c:2883 [inline]
 __schedule+0x66b/0x770 kernel/sched/core.c:3524
 schedule+0x1cc/0x2f0 kernel/sched/core.c:3568
 schedule_hrtimeout_range_clock+0x2d9/0x500 kernel/time/hrtimer.c:1944
 schedule_hrtimeout_range+0x97/0xb0 kernel/time/hrtimer.c:1989
 ep_poll fs/eventpoll.c:1812 [inline]
 do_epoll_wait+0x142e/0x1770 fs/eventpoll.c:2191
 __do_sys_epoll_wait fs/eventpoll.c:2201 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2198 [inline]
 __x64_sys_epoll_wait+0x116/0x170 fs/eventpoll.c:2198
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fdeab5c5943
RSP: 002b:00007ffefe8f18b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000995250 RCX: 00007fdeab5c5943
RDX: 0000000000000004 RSI: 00007ffefe8f1980 RDI: 0000000000000007
RBP: 0000000000625500 R08: 0000000000000001 R09: 000000000003dd44
R10: 000000000000ee3c R11: 0000000000000246 R12: 00000000009a70d0
R13: 00007ffefe8f29d7 R14: 0000000000000005 R15: 0000000000995250
Code: 8b 87 90 0c 00 00 48 89 45 c8 49 8b 47 10 41 8b 8f 98 0c 00 00 48 89 4d b8 4d 8d 74 24 08 48 89 45 d0 48 85 c0 0f 85 33 01 00 00 <4d> 8b 2e 4c 89 f7 e8 9f 96 be fd 4c 8b 30 8b 32 4c 89 f0 48 09 
RIP: __list_add_valid+0x66/0x450 lib/list_debug.c:23 RSP: ffff880196c1f4e0
CR2: 0000000000000008
---[ end trace 07ce6f1e160e4eb6 ]---