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AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): 
WARNING: CPU: 0 PID: 8705 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b1/0x2f0 security/apparmor/secid.c:82
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8705 Comm: syz-executor4 Not tainted 4.19.0-rc2+ #214
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+0x1c4/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:apparmor_secid_to_secctx+0x2b1/0x2f0 security/apparmor/secid.c:82
Code: c7 c7 c0 67 5f 88 e8 de 44 f4 fd 0f 0b e9 6c fe ff ff e8 12 5a 2a fe 48 c7 c6 00 69 5f 88 48 c7 c7 20 67 5f 88 e8 bf 44 f4 fd <0f> 0b e9 3f fe ff ff 48 89 df e8 90 c8 6d fe e9 ed fe ff ff bb f4
RSP: 0018:ffff88019f09ed10 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88019f09eed0 RCX: ffffc90004c5f000
RDX: 000000000002f743 RSI: ffffffff8164f825 RDI: 0000000000000005
RBP: ffff88019f09ed30 R08: ffff8801bbb82440 R09: ffffed003b583ee2
R10: ffffed003b583ee2 R11: ffff8801dac1f717 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88019f09eed0
 security_secid_to_secctx+0x64/0xc0 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+0x303/0x1470 net/netfilter/nf_conntrack_netlink.c:706
 nf_conntrack_eventmask_report+0x528/0x8c0 net/netfilter/nf_conntrack_ecache.c:151
 nf_conntrack_event_report include/net/netfilter/nf_conntrack_ecache.h:112 [inline]
 nf_ct_delete+0x324/0x590 net/netfilter/nf_conntrack_core.c:601
 nf_ct_iterate_cleanup+0x47a/0x5c0 net/netfilter/nf_conntrack_core.c:1892
 nf_ct_iterate_cleanup_net+0x237/0x2d0 net/netfilter/nf_conntrack_core.c:1974
 ctnetlink_flush_conntrack net/netfilter/nf_conntrack_netlink.c:1226 [inline]
 ctnetlink_del_conntrack+0x661/0x840 net/netfilter/nf_conntrack_netlink.c:1258
 nfnetlink_rcv_msg+0xdd3/0x10c0 net/netfilter/nfnetlink.c:228
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2447
 nfnetlink_rcv+0x1c0/0x4d0 net/netfilter/nfnetlink.c:560
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:631
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2114
 __sys_sendmsg+0x11d/0x280 net/socket.c:2152
 __do_sys_sendmsg net/socket.c:2161 [inline]
 __se_sys_sendmsg net/socket.c:2159 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2159
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4572d9
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:00007fdfe2187c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fdfe21886d4 RCX: 00000000004572d9
RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4f20 R14: 00000000004c9419 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..