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AppArmor WARN cred_label: ((!blob)): 
WARNING: CPU: 1 PID: 1358 at security/apparmor/include/cred.h:30 cred_label security/apparmor/include/cred.h:30 [inline]
WARNING: CPU: 1 PID: 1358 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: 1358 Comm: udevd Not tainted 5.0.0-rc1-next-20190114 #11
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 c0 d1 7c 88 e8 ed 6f f2 fd 0f 0b eb a9 e8 14 46 29 fe 48 c7 c6 80 e1 7c 88 48 c7 c7 c0 d1 7c 88 e8 d1 6f 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: 0018:ffff8880ae7079f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff81688726 RDI: 0000000000000006
RBP: ffff8880ae707a18 R08: ffff8880908b82c0 R09: ffff8880908b8b60
R10: ffff8880908b82c0 R11: 0000000000000000 R12: ffff888097829c00
R13: ffff888097829c00 R14: ffff888097829c88 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: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
RIP: 0010:kmem_cache_free+0xab/0x260 mm/slab.c:3750
Code: e8 fa 28 00 00 84 c0 74 77 41 f7 c5 00 02 00 00 74 4f e8 c8 49 c2 ff 48 83 3d 00 43 cc 07 00 0f 84 ae 01 00 00 4c 89 ef 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 60 40 3b 7e 83
RSP: 0018:ffff88805babf5c0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffff8880a63df318 RCX: 1ffff1101211716c
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000286
RBP: ffff88805babf5e0 R08: 0000000000000006 R09: ffff8880908b8b60
R10: ffff8880908b82c0 R11: 0000000000000000 R12: ffff88821bc40c40
R13: 0000000000000286 R14: ffffffff814a832d R15: 0000000000000073
 vm_area_free+0x1d/0x30 kernel/fork.c:351
 remove_vma+0x142/0x180 mm/mmap.c:185
 exit_mmap+0x37c/0x5d0 mm/mmap.c:3151
 __mmput kernel/fork.c:1047 [inline]
 mmput+0x240/0x640 kernel/fork.c:1068
 exec_mmap fs/exec.c:1046 [inline]
 flush_old_exec+0xb6d/0x21a0 fs/exec.c:1279
 load_elf_binary+0xa70/0x5580 fs/binfmt_elf.c:869
 search_binary_handler fs/exec.c:1656 [inline]
 search_binary_handler+0x17f/0x570 fs/exec.c:1634
 exec_binprm fs/exec.c:1698 [inline]
 __do_execve_file.isra.0+0x14f3/0x2700 fs/exec.c:1818
 do_execveat_common fs/exec.c:1865 [inline]
 do_execve fs/exec.c:1882 [inline]
 __do_sys_execve fs/exec.c:1963 [inline]
 __se_sys_execve fs/exec.c:1958 [inline]
 __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f3b0894b207
Code: Bad RIP value.
RSP: 002b:00007ffd997683f8 EFLAGS: 00000202 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f3b0894b207
RDX: 000000000214b910 RSI: 00007ffd997684f0 RDI: 00007ffd99769500
RBP: 0000000000625500 R08: 000000000000211e R09: 000000000000211e
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000214b910
R13: 0000000000000007 R14: 000000000213a250 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..