BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD a6632067 P4D a6632067 PUD a7af1067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7333 Comm: syz-executor.1 Not tainted 5.7.0-rc6-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:ffffc90003d9ff28 EFLAGS: 00010296
RAX: 0000000000000000 RBX: ffffffff886003e8 RCX: f66c80d75064df00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: 0000000000000000 R08: ffffffff81791080 R09: fffffbfff16f4b96
R10: fffffbfff16f4b96 R11: 0000000000000000 R12: 0000000000000023
R13: dffffc0000000000 R14: ffffc90003d9ff58 R15: 0000000000000000
FS:  000000000218f940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a4fbb000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45af30
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 ef 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:00007ffc44138458 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 000000000008f537 RCX: 000000000045af30
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffc44138460
RBP: 0000000000000716 R08: 0000000000000001 R09: 000000000218f940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007
R13: 00007ffc441384b0 R14: 000000000008f4a4 R15: 00007ffc441384c0
Modules linked in:
CR2: 0000000000000000
---[ end trace c4cbaaca52c69db9 ]---
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:ffffc90003d9ff28 EFLAGS: 00010296
RAX: 0000000000000000 RBX: ffffffff886003e8 RCX: f66c80d75064df00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: 0000000000000000 R08: ffffffff81791080 R09: fffffbfff16f4b96
R10: fffffbfff16f4b96 R11: 0000000000000000 R12: 0000000000000023
R13: dffffc0000000000 R14: ffffc90003d9ff58 R15: 0000000000000000
FS:  000000000218f940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a4fbb000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400