BUG: kernel NULL pointer dereference, address: 0000000000000282
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 8b804067 P4D 8b804067 PUD 8b805067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6783 Comm: syz-executor.0 Not tainted 5.8.0-rc3-next-20200703-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:322
Code: 0b 0f 1f 00 41 55 65 48 8b 04 25 c0 fe 01 00 41 54 55 53 48 83 3d 91 7e 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:ffffc900016a7f18 EFLAGS: 00010282
RAX: 0000000000000282 RBX: 0000000000004000 RCX: 0000000000000000
RDX: ffff8880969bc5c0 RSI: ffffffff816461dd RDI: ffffc900016a7f58
RBP: ffffc900016a7f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000ef8940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000282 CR3: 000000008b803000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:376
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45b030
Code: Bad RIP value.
RSP: 002b:00007ffcd6e59698 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: 0000000000000000 RBX: 00000000000f1d50 RCX: 000000000045b030
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffcd6e596a0
RBP: 0000000000000bdd R08: 0000000000000001 R09: 0000000000ef8940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007ffcd6e596f0 R14: 00000000000f1c93 R15: 00007ffcd6e59700
Modules linked in:
CR2: 0000000000000282
BUG: stack guard page was hit at 00000000994d2b69 (stack is 00000000df3062cd..000000007046f2f3)
---[ end trace 5c82388105483f23 ]---
RIP: 0010:__syscall_return_slowpath+0x26/0x280 arch/x86/entry/common.c:322
Code: 0b 0f 1f 00 41 55 65 48 8b 04 25 c0 fe 01 00 41 54 55 53 48 83 3d 91 7e 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:ffffc900016a7f18 EFLAGS: 00010282
RAX: 0000000000000282 RBX: 0000000000004000 RCX: 0000000000000000
RDX: ffff8880969bc5c0 RSI: ffffffff816461dd RDI: ffffc900016a7f58
RBP: ffffc900016a7f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000ef8940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000282 CR3: 000000008b803000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400