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AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): 
WARNING: CPU: 1 PID: 21050 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: 1 PID: 21050 Comm: syz-executor2 Not tainted 4.19.0-rc1+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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 ac b8 8f 89 48 c7 c6 cd b8 8f 89 31 c0 e8 c3 30 46 fd <0f> 0b e9 38 fd ff ff 8b 7d c4 e8 04 f8 e6 fd e9 9d fe ff ff 49 89
RSP: 0018:ffff88005ca7ed90 EFLAGS: 00010282
RAX: 0000000000000036 RBX: ffff88012c224400 RCX: 0000000000040000
RDX: ffffc90002784000 RSI: 00000000000104b7 RDI: 00000000000104b8
RBP: ffff88005ca7ee00 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_iterate_cleanup+0x4c2/0x750 net/netfilter/nf_conntrack_core.c:1892
 nf_ct_iterate_cleanup_net+0x17e/0x210 net/netfilter/nf_conntrack_core.c:1974
 ctnetlink_flush_conntrack net/netfilter/nf_conntrack_netlink.c:1226 [inline]
 ctnetlink_del_conntrack+0xc32/0xd80 net/netfilter/nf_conntrack_netlink.c:1258
 nfnetlink_rcv_msg+0xb49/0xca0 net/netfilter/nfnetlink.c:228
 netlink_rcv_skb+0x36e/0x5f0 net/netlink/af_netlink.c:2454
 nfnetlink_rcv+0x36b/0x3a90 net/netfilter/nfnetlink.c:560
 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
 netlink_unicast+0x1638/0x1720 net/netlink/af_netlink.c:1343
 netlink_sendmsg+0x1205/0x1290 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
 __sys_sendmsg net/socket.c:2152 [inline]
 __do_sys_sendmsg net/socket.c:2161 [inline]
 __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457099
Code: fd b4 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3c62061c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3c620626d4 RCX: 0000000000457099
RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000005
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4878 R14: 00000000004c8ed0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..