BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 1bf332067 P4D 1bf332067 PUD 19d2a9067 PMD 0 
Oops: 0010 [#1] SMP KASAN
CPU: 0 PID: 8727 Comm: syz-executor0 Not tainted 4.18.0-rc2+ #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff88019cca7708 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801da4ea000 RCX: ffffc90001e1c000
RDX: ffff88019cca7a60 RSI: ffff8801da4ea000 RDI: ffff8801ca73f540
RBP: ffff88019cca77b0 R08: ffff8801aab1c480 R09: ffff88019cca7260
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88019cca7a60
R13: ffff8801ca73f540 R14: ffffffff8818a920 R15: ffff8801d2d1a100
FS:  0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f5fdcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000194d42000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_poll include/linux/poll.h:86 [inline]
 do_pollfd fs/select.c:825 [inline]
 do_poll fs/select.c:873 [inline]
 do_sys_poll+0x74d/0x1180 fs/select.c:967
 __do_sys_poll fs/select.c:1025 [inline]
 __se_sys_poll fs/select.c:1013 [inline]
 __ia32_sys_poll+0x196/0x520 fs/select.c:1013
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fe0cb9
Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 
RSP: 002b:00000000f5fdc0ac EFLAGS: 00000282 ORIG_RAX: 00000000000000a8
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000000007
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000000
---[ end trace c5d84a7b856d2425 ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff88019cca7708 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801da4ea000 RCX: ffffc90001e1c000
RDX: ffff88019cca7a60 RSI: ffff8801da4ea000 RDI: ffff8801ca73f540
RBP: ffff88019cca77b0 R08: ffff8801aab1c480 R09: ffff88019cca7260
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88019cca7a60
R13: ffff8801ca73f540 R14: ffffffff8818a920 R15: ffff8801d2d1a100
FS:  0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f5fdcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000194d42000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400