BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 88f9e067 P4D 88f9e067 PUD a9006067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 23339 Comm: syz-executor.2 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__syscall_return_slowpath+0x17/0x280 arch/x86/entry/common.c:311
Code: 00 00 00 00 00 eb 92 e8 37 a5 4c 00 eb 81 0f 0b 0f 1f 00 41 55 65 48 8b 04 25 00 00 01 00 41 54 55 53 48 83 3d d1 5f b4 08 00 <48> 8b 18 74 3f 48 89 fd 9c 58 0f 1f 44 00 00 f6 c4 02 74 32 f7 c3
RSP: 0018:ffffc9000539ff18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff81bcecbe
RDX: ffff88809508e1c0 RSI: ffffffff81bcecd4 RDI: ffffc9000539ff58
RBP: ffffc9000539ff58 R08: 0000000000000000 R09: ffff8880a8b56143
R10: 00000000fffffdfc R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000002512940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000056ff4000 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:368
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x416721
Code: Bad RIP value.
RSP: 002b:0000000000c9fbe0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: fffffffffffffff7 RBX: 0000000000000006 RCX: 0000000000416721
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000c9fcd0 R11: 0000000000000293 R12: 0000000000790548
R13: 000000000008986c R14: ffffffffffffffff R15: 000000000078bfac
Modules linked in:
CR2: 0000000000000000
---[ end trace 2038127c7231d87a ]---
RIP: 0010:__syscall_return_slowpath+0x17/0x280 arch/x86/entry/common.c:311
Code: 00 00 00 00 00 eb 92 e8 37 a5 4c 00 eb 81 0f 0b 0f 1f 00 41 55 65 48 8b 04 25 00 00 01 00 41 54 55 53 48 83 3d d1 5f b4 08 00 <48> 8b 18 74 3f 48 89 fd 9c 58 0f 1f 44 00 00 f6 c4 02 74 32 f7 c3
RSP: 0018:ffffc9000539ff18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff81bcecbe
RDX: ffff88809508e1c0 RSI: ffffffff81bcecd4 RDI: ffffc9000539ff58
RBP: ffffc9000539ff58 R08: 0000000000000000 R09: ffff8880a8b56143
R10: 00000000fffffdfc R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000002512940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000056ff4000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400