BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 11ef57067 P4D 11ef57067 PUD 11eda6067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP
CPU: 0 PID: 4114 Comm: syz-executor.5 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:exit_to_usermode_loop+0x6f/0x2c0 arch/x86/entry/common.c:150
Code: 07 25 46 00 48 c7 c7 d0 c9 25 87 e8 7b 4e 54 00 48 83 3d 03 51 25 06 00 0f 84 fe 01 00 00 e8 e8 24 46 00 fb 66 0f 1f 44 00 00 <41> 00 00 00 00 00 00 00 00 00 70 07 00 00 00 00 00 45 85 ff 0f 85
RSP: 0000:ffffc900018dbed0 EFLAGS: 00010293
RAX: ffff88808bc66080 RBX: 0000000000000008 RCX: ffffffff88af0438
RDX: 0000000000000000 RSI: ffffffff810078d8 RDI: ffffffff8725c9d0
RBP: ffff88808bc66080 R08: 0000000000000000 R09: 0000ffff8725c9d0
R10: 0000c90000003f98 R11: 0000ffff8725c9d7 R12: ffffc900018dbf58
R13: ffff88808bc66080 R14: ffff88808bc66708 R15: 0000000000000000
FS:  00000000027dc940(0000) GS:ffff88812c000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011e791000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 prepare_exit_to_usermode+0x194/0x1e0 arch/x86/entry/common.c:196
 ret_from_intr+0x21/0x21
RIP: 0033:0x41683c
Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 5d 31 89 00 00 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 <c3> 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 48
RSP: 002b:00007ffe1da53ef8 EFLAGS: 00000203 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000003 RBX: 00007ffe1da53f24 RCX: 0000000000416830
RDX: 00007ffe1da53f2a RSI: 0000000000080001 RDI: 00000000004c25b7
RBP: 00007ffe1da53f20 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000075 R11: 0000000000000246 R12: 00000000004c25b7
R13: 00007ffe1da54440 R14: 0000000000000000 R15: 00007ffe1da54450
Modules linked in:
CR2: 0000000000000000
---[ end trace 4066282c55c4f0b8 ]---
RIP: 0010:exit_to_usermode_loop+0x6f/0x2c0 arch/x86/entry/common.c:150
Code: 07 25 46 00 48 c7 c7 d0 c9 25 87 e8 7b 4e 54 00 48 83 3d 03 51 25 06 00 0f 84 fe 01 00 00 e8 e8 24 46 00 fb 66 0f 1f 44 00 00 <41> 00 00 00 00 00 00 00 00 00 70 07 00 00 00 00 00 45 85 ff 0f 85
RSP: 0000:ffffc900018dbed0 EFLAGS: 00010293
RAX: ffff88808bc66080 RBX: 0000000000000008 RCX: ffffffff88af0438
RDX: 0000000000000000 RSI: ffffffff810078d8 RDI: ffffffff8725c9d0
RBP: ffff88808bc66080 R08: 0000000000000000 R09: 0000ffff8725c9d0
R10: 0000c90000003f98 R11: 0000ffff8725c9d7 R12: ffffc900018dbf58
R13: ffff88808bc66080 R14: ffff88808bc66708 R15: 0000000000000000
FS:  00000000027dc940(0000) GS:ffff88812c000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011e791000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400