BUG: kernel NULL pointer dereference, address: 0000000000000286
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3889 Comm: systemd-udevd Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__syscall_return_slowpath+0x26/0x280 arch/x86/entry/common.c:339
Code: 0b 0f 1f 00 41 55 65 48 8b 04 25 00 ff 01 00 41 54 55 53 48 83 3d 19 60 b4 08 00 48 8b 18 74 3f 48 89 fd 9c 58 0f 1f 44 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc90001277f18 EFLAGS: 00010286
RAX: 0000000000000286 RBX: 0000000000004100 RCX: ffffffff81befcf2
RDX: ffff8880a61a0500 RSI: ffffffff81bf186d RDI: ffffc90001277f58
RBP: ffffc90001277f58 R08: 0000000000000000 R09: ffffc90001277d6f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f44933218c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000286 CR3: 00000000a68ba000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:393
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4492194335
Code: Bad RIP value.
RSP: 002b:00007ffcb7cfdc98 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 000055e6ada158c0 RCX: 00007f4492194335
RDX: 00007ffcb7cfdcd0 RSI: 00007ffcb7cfdcd0 RDI: 000055e6ada148c0
RBP: 00007ffcb7cfdd90 R08: 00007f4492453228 R09: 0000000000001010
R10: 00007f4492452b58 R11: 0000000000000246 R12: 000055e6ada148c0
R13: 000055e6ada148c4 R14: 000055e6ada25f21 R15: 000055e6ada25f24
Modules linked in:
CR2: 0000000000000286