BUG: kernel NULL pointer dereference, address: 0000000000000282
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 87b72067 P4D 87b72067 PUD 87b73067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6949 Comm: syz-executor.1 Not tainted 5.8.0-rc4-next-20200709-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 c0 fe 01 00 41 54 55 53 48 83 3d d1 7f 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:ffffc90002077f18 EFLAGS: 00010282
RAX: 0000000000000282 RBX: 0000000000004000 RCX: 0000000000000000
RDX: ffff88808ce10280 RSI: ffffffff8164617d RDI: ffffc90002077f58
RBP: ffffc90002077f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000d1d940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000282 CR3: 0000000087b71000 CR4: 00000000001526e0
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: 0033:0x45b0b0
Code: Bad RIP value.
RSP: 002b:00007ffd3ff98688 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: 0000000000000000 RBX: 000000000007d36b RCX: 000000000045b0b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd3ff98690
RBP: 000000000000047b R08: 0000000000000001 R09: 0000000000d1d940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007ffd3ff986e0 R14: 000000000007d306 R15: 00007ffd3ff986f0
Modules linked in:
CR2: 0000000000000282
---[ end trace 0fecf22463b5e172 ]---
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 c0 fe 01 00 41 54 55 53 48 83 3d d1 7f 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:ffffc90002077f18 EFLAGS: 00010282
RAX: 0000000000000282 RBX: 0000000000004000 RCX: 0000000000000000
RDX: ffff88808ce10280 RSI: ffffffff8164617d RDI: ffffc90002077f58
RBP: ffffc90002077f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000d1d940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000282 CR3: 0000000087b71000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400