BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 1b437b067 P4D 1b437b067 PUD 1a9007067 PMD 0 
Oops: 0010 [#1] SMP KASAN
CPU: 1 PID: 14414 Comm: syz-executor7 Not tainted 4.18.0-rc2+ #121
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8801b0847758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801b3c47900 RCX: ffffc90003a6a000
RDX: ffff8801b0847ab0 RSI: ffff8801b3c47900 RDI: ffff8801c5bb9d00
RBP: ffff8801b0847800 R08: ffff88019aaee740 R09: ffff8801b08472b0
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801b0847ab0
R13: ffff8801c5bb9d00 R14: ffffffff8818a920 R15: ffff88019d632180
FS:  00007ff12c437700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001acbdb000 CR4: 00000000001426e0
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]
 __x64_sys_poll+0xef/0x530 fs/select.c:1013
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a99
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ff12c436c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000007
RAX: ffffffffffffffda RBX: 00007ff12c4376d4 RCX: 0000000000455a99
RDX: fffffffffffffffa RSI: 0000000000000005 RDI: 0000000020000140
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c0639 R14: 00000000004cffa8 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000000
---[ end trace ce8e6a2e4fe2e6d7 ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8801b0847758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801b3c47900 RCX: ffffc90003a6a000
RDX: ffff8801b0847ab0 RSI: ffff8801b3c47900 RDI: ffff8801c5bb9d00
RBP: ffff8801b0847800 R08: ffff88019aaee740 R09: ffff8801b08472b0
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801b0847ab0
R13: ffff8801c5bb9d00 R14: ffffffff8818a920 R15: ffff88019d632180
FS:  00007ff12c437700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001acbdb000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400