BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 873f3067 P4D 873f3067 PUD 873f4067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 11211 Comm: syz-executor.4 Not tainted 5.7.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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:ffffc900047dff28 EFLAGS: 00010296
RAX: 0000000000000000 RBX: ffffffff886003e8 RCX: 49bfba821f86ca00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286
RBP: 0000000000000000 R08: ffffffff81790ea0 R09: fffffbfff16fec2e
R10: fffffbfff16fec2e R11: 0000000000000000 R12: 0000000000000023
R13: dffffc0000000000 R14: ffffc900047dff58 R15: 0000000000000000
FS:  00000000016bb940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000873f2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ad30
Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 21 dc 84 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 d1 fb ff c3 48 83 ec 08 e8 8a 46 00 00
RSP: 002b:00007ffd63cc7518 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 000000000004705d RCX: 000000000045ad30
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd63cc7520
RBP: 000000000000002f R08: 0000000000000001 R09: 00000000016bb940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd63cc7570 R14: 000000000004705d R15: 00007ffd63cc7580
Modules linked in:
CR2: 0000000000000000
---[ end trace 02a84c9a0c9d01b5 ]---
RIP: 0010:do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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:ffffc900047dff28 EFLAGS: 00010296
RAX: 0000000000000000 RBX: ffffffff886003e8 RCX: 49bfba821f86ca00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286
RBP: 0000000000000000 R08: ffffffff81790ea0 R09: fffffbfff16fec2e
R10: fffffbfff16fec2e R11: 0000000000000000 R12: 0000000000000023
R13: dffffc0000000000 R14: ffffc900047dff58 R15: 0000000000000000
FS:  00000000016bb940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000873f2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400