netlink: 'syz-executor5': attribute type 39 has an invalid length.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 1a9c7c067 P4D 1a9c7c067 PUD 1cbac9067 PMD 0 
Oops: 0010 [#1] SMP KASAN
CPU: 1 PID: 8660 Comm: syz-executor2 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:ffff880198d97688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801a77b8a00 RCX: ffffc90002025000
RDX: ffff880198d979e0 RSI: ffff8801a77b8a00 RDI: ffff8801d769fa40
RBP: ffff880198d97730 R08: ffff880197dbc280 R09: ffffed003b5e46d6
R10: 0000000000000003 R11: 0000000000000000 R12: ffff880198d979e0
R13: ffff8801d769fa40 R14: ffffffff8818a920 R15: ffff880197556000
FS:  00007feb7e224700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ca6bb000 CR4: 00000000001406e0
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_ppoll fs/select.c:1075 [inline]
 __se_sys_ppoll fs/select.c:1047 [inline]
 __x64_sys_ppoll+0x2fe/0x610 fs/select.c:1047
 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:00007feb7e223c68 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 00007feb7e2246d4 RCX: 0000000000455a99
RDX: 0000000020000880 RSI: 000000000000000a RDI: 0000000020000800
RBP: 000000000072bea0 R08: 0000000000000008 R09: 0000000000000000
R10: 00000000200008c0 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c0638 R14: 00000000004cffc0 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000000
---[ end trace f105e0a135fb38bb ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff880198d97688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801a77b8a00 RCX: ffffc90002025000
RDX: ffff880198d979e0 RSI: ffff8801a77b8a00 RDI: ffff8801d769fa40
RBP: ffff880198d97730 R08: ffff880197dbc280 R09: ffffed003b5e46d6
R10: 0000000000000003 R11: 0000000000000000 R12: ffff880198d979e0
R13: ffff8801d769fa40 R14: ffffffff8818a920 R15: ffff880197556000
FS:  00007feb7e224700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
CR2: ffffffffffffffd6 CR3: 00000001ca6bb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400