------------[ cut here ]------------
AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): 
WARNING: CPU: 0 PID: 1928 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x38d/0x3c0 security/apparmor/secid.c:82
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 1928 Comm: kworker/0:2 Not tainted 4.19.0-rc1+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient gc_worker
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x14b/0x190 lib/dump_stack.c:113
 panic+0x35d/0x8cb kernel/panic.c:184
 __warn+0x40a/0x590 kernel/panic.c:536
 report_bug+0x65c/0x850 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x1c0/0x620 arch/x86/kernel/traps.c:298
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:318
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1000
RIP: 0010:apparmor_secid_to_secctx+0x38d/0x3c0 security/apparmor/secid.c:82
Code: c7 83 68 09 00 00 00 00 00 00 48 c7 83 80 0c 00 00 00 00 00 00 48 c7 c7 4c aa 8f 89 48 c7 c6 6d aa 8f 89 31 c0 e8 f3 e6 45 fd <0f> 0b e9 38 fd ff ff 8b 7d c4 e8 a4 d2 e6 fd e9 9d fe ff ff 49 89
RSP: 0018:ffff8801c8eef7d0 EFLAGS: 00010286
RAX: 0000000000000036 RBX: ffff8801d4402680 RCX: ffff8801d4401d80
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: 0000000000000000
RBP: ffff8801c8eef840 R08: 0000000000480020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 security_secid_to_secctx+0x127/0x200 security/security.c:1314
 ctnetlink_secctx_size net/netfilter/nf_conntrack_netlink.c:621 [inline]
 ctnetlink_nlmsg_size net/netfilter/nf_conntrack_netlink.c:659 [inline]
 ctnetlink_conntrack_event+0x54a/0x4390 net/netfilter/nf_conntrack_netlink.c:706
 nf_conntrack_eventmask_report+0x579/0x970 net/netfilter/nf_conntrack_ecache.c:151
 nf_conntrack_event_report include/net/netfilter/nf_conntrack_ecache.h:112 [inline]
 nf_ct_delete+0x394/0x790 net/netfilter/nf_conntrack_core.c:601
 nf_ct_kill include/net/netfilter/nf_conntrack.h:216 [inline]
 nf_ct_gc_expired net/netfilter/nf_conntrack_core.c:654 [inline]
 gc_worker+0xb62/0x1570 net/netfilter/nf_conntrack_core.c:1173
 process_one_work+0x1605/0x1f40 kernel/workqueue.c:2153
 worker_thread+0x11a2/0x2590 kernel/workqueue.c:2296
 kthread+0x465/0x4a0 kernel/kthread.c:247
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:416
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..