BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 57cb3067 P4D 57cb3067 PUD 57cb4067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6817 Comm: syz-executor.4 Not tainted 4.19.136-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:267 [inline]
RIP: 0010:do_syscall_64+0x19c/0x620 arch/x86/entry/common.c:296
Code: 03 00 00 e8 c6 15 69 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c3 48 89 c6 e8 3d 17 69 00 48 85 db 0f 84 00 03 00 00 <00> 00 00 00 00 44 89 e3 31 ff 81 e3 91 00 00 10 89 de e8 fd 16 69
RSP: 0018:ffff888057cc7f28 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff81009993
RDX: 0000000000000200 RSI: ffff888057cb8440 RDI: 0000000000000007
RBP: ffff888057cc7f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000002c9f940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000057cb2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b141
Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 54 d1 fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffe0180f4a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: 0000000000000000 RBX: 00000000001016f9 RCX: 000000000045b141
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe0180f4b0
RBP: 0000000000000bfe R08: 0000000000000000 R09: 0000000002c9f940
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000a
R13: 00007ffe0180f500 R14: 000000000010169f R15: 00007ffe0180f510
Modules linked in:
CR2: 0000000000000000
---[ end trace da802e3a2cd95f92 ]---
RIP: 0010:syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
RIP: 0010:do_syscall_64+0x19c/0x620 arch/x86/entry/common.c:296
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
Code: 03 00 00 e8 c6 15 69 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c3 48 89 c6 e8 3d 17 69 00 48 85 db 0f 84 00 03 00 00 <00> 00 00 00 00 44 89 e3 31 ff 81 e3 91 00 00 10 89 de e8 fd 16 69
PGD 0 
RSP: 0018:ffff888057cc7f28 EFLAGS: 00010206
P4D 0 
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff81009993
Oops: 0002 [#2] PREEMPT SMP KASAN
RDX: 0000000000000200 RSI: ffff888057cb8440 RDI: 0000000000000007
CPU: 1 PID: 3712 Comm: systemd-udevd Tainted: G      D           4.19.136-syzkaller #0
RBP: ffff888057cc7f58 R08: 0000000000000000 R09: 0000000000000000
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
RIP: 0010:syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
RIP: 0010:do_syscall_64+0x19c/0x620 arch/x86/entry/common.c:296
R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000
Code: 03 00 00 e8 c6 15 69 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c3 48 89 c6 e8 3d 17 69 00 48 85 db 0f 84 00 03 00 00 <00> 00 00 00 00 44 89 e3 31 ff 81 e3 91 00 00 10 89 de e8 fd 16 69
FS:  0000000002c9f940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
RSP: 0018:ffff88808ec07f28 EFLAGS: 00010206
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff81009993
CR2: 0000000000000000 CR3: 0000000057cb2000 CR4: 00000000001406f0
RDX: 0000000000000200 RSI: ffff88808f3fe040 RDI: 0000000000000007
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
RBP: ffff88808ec07f58 R08: 0000000000400000 R09: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
R10: 0000000000000007 R11: 0000000080f380d9 R12: 0000000000000100