BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 68d62067 P4D 68d62067 PUD 68d63067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7267 Comm: syz-executor.2 Not tainted 5.6.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
RIP: 0010:do_syscall_32_irqs_on arch/x86/entry/common.c:352 [inline]
RIP: 0010:do_fast_syscall_32+0x30f/0xe8f arch/x86/entry/common.c:408
Code: 00 0f 84 1e 08 00 00 e8 3f 72 71 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c6 48 89 04 24 e8 b5 73 71 00 48 8b 34 24 <48> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900049f7f18 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000020020000 RCX: ffffffff8100b2fb
RDX: 0000000000000200 RSI: 0000000000000200 RDI: 0000000000000007
RBP: ffffc900049f7f58 R08: ffff888068db8640 R09: ffffed1015ce7074
R10: ffffed1015ce7073 R11: ffff8880ae73839b R12: 00000000f7fb2e39
R13: ffffffff8973b4d0 R14: ffffc900049f7fd8 R15: ffffc900049f7fd0
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:000000000a31e900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000068d61000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
Modules linked in:
CR2: 0000000000000000
---[ end trace 352891258120e8fd ]---
RIP: 0010:syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
RIP: 0010:do_syscall_32_irqs_on arch/x86/entry/common.c:352 [inline]
RIP: 0010:do_fast_syscall_32+0x30f/0xe8f arch/x86/entry/common.c:408
Code: 00 0f 84 1e 08 00 00 e8 3f 72 71 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c6 48 89 04 24 e8 b5 73 71 00 48 8b 34 24 <48> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900049f7f18 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000020020000 RCX: ffffffff8100b2fb
RDX: 0000000000000200 RSI: 0000000000000200 RDI: 0000000000000007
RBP: ffffc900049f7f58 R08: ffff888068db8640 R09: ffffed1015ce7074
R10: ffffed1015ce7073 R11: ffff8880ae73839b R12: 00000000f7fb2e39
R13: ffffffff8973b4d0 R14: ffffc900049f7fd8 R15: ffffc900049f7fd0
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:000000000a31e900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000068d61000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400