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AppArmor WARN cred_label: ((!blob)): 
WARNING: CPU: 1 PID: 7801 at security/apparmor/include/cred.h:30 cred_label security/apparmor/include/cred.h:30 [inline]
WARNING: CPU: 1 PID: 7801 at security/apparmor/include/cred.h:30 apparmor_cred_free+0x12f/0x1a0 security/apparmor/lsm.c:62
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7801 Comm: syz-executor5 Not tainted 5.0.0-rc2-next-20190117 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x48 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:cred_label security/apparmor/include/cred.h:30 [inline]
RIP: 0010:apparmor_cred_free+0x12f/0x1a0 security/apparmor/lsm.c:62
Code: 7c 88 48 c7 c7 80 d2 7c 88 e8 9d 69 f2 fd 0f 0b eb a9 e8 a4 40 29 fe 48 c7 c6 40 e2 7c 88 48 c7 c7 80 d2 7c 88 e8 81 69 f2 fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 80 38 00 75 4a 4c 8b 2c 25 00
RSP: 0000:ffff8880ae7079f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff81688726 RDI: 0000000000000006
RBP: ffff8880ae707a18 R08: ffff88805bdfe480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809cb14a00
R13: ffff88809cb14a00 R14: ffff88809cb14a88 R15: dffffc0000000000
 security_cred_free+0x4b/0xf0 security/security.c:1490
 put_cred_rcu+0x21f/0x6e0 kernel/cred.c:118
 __rcu_reclaim kernel/rcu/rcu.h:240 [inline]
 rcu_do_batch kernel/rcu/tree.c:2486 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2799 [inline]
 rcu_core+0xc4a/0x1680 kernel/rcu/tree.c:2780
 __do_softirq+0x30b/0xb11 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0033:0x40c216
Code: c5 48 8b 05 a4 42 64 00 4c 89 eb 44 8b 20 eb 49 0f 1f 40 00 bf e8 03 00 00 e8 16 be 04 00 e8 31 5b ff ff 48 8b 15 82 42 64 00 <8b> 0a 48 89 c2 41 39 cc 48 0f 45 d8 4c 29 ea 48 81 fa 87 13 00 00
RSP: 002b:00007ffce64256c0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000067044 RBX: 0000000000067029 RCX: 0000000000066c88
RDX: 0000001b33420000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000081f R08: 0000000000000001 R09: 00000000029bb940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000066e9d R14: 00000000000002e2 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..