------------[ cut here ]------------
AppArmor WARN cred_label: ((!blob)): 
WARNING: CPU: 0 PID: 28789 at security/apparmor/include/cred.h:30 cred_label security/apparmor/include/cred.h:30 [inline]
WARNING: CPU: 0 PID: 28789 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: 0 PID: 28789 Comm: udevd Not tainted 5.0.0-rc2-next-20190116 #13
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 40 d2 7c 88 e8 ed 08 f2 fd 0f 0b eb a9 e8 f4 df 28 fe 48 c7 c6 00 e2 7c 88 48 c7 c7 40 d2 7c 88 e8 d1 08 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:ffff8880ae6079f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff81688726 RDI: 0000000000000006
RBP: ffff8880ae607a18 R08: ffff8880937ec700 R09: ffff8880937ecff0
R10: ffff8880937ec700 R11: 0000000000000000 R12: ffff888088f92800
R13: ffff888088f92800 R14: ffff888088f92888 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:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:101
Code: 85 68 fe ff ff e9 46 df ff ff 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 68 b8 7f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 e0 12 00 00 83 fa 02 75 20 48 8b 88 e8 12 00 00 8b 80 e4 12
RSP: 0018:ffff8880932cf4e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8880937ec700 RBX: ffff8880835a9000 RCX: ffffffff81b83e75
RDX: 0000000000000000 RSI: ffffffff81b83f7c RDI: 0000000000000007
RBP: ffff8880932cf4e0 R08: ffff8880937ec700 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000001 R12: 00007f5a8c1c6000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 vma_compute_subtree_gap+0x16c/0x230 mm/mmap.c:301
 validate_mm_rb+0x7c/0xc0 mm/mmap.c:379
 vma_rb_insert mm/mmap.c:450 [inline]
 __vma_link_rb+0x263/0x370 mm/mmap.c:606
 dup_mmap kernel/fork.c:579 [inline]
 dup_mm kernel/fork.c:1320 [inline]
 copy_mm kernel/fork.c:1375 [inline]
 copy_process+0x36e7/0x8740 kernel/fork.c:1917
 _do_fork+0x1a9/0x1170 kernel/fork.c:2227
 __do_sys_clone kernel/fork.c:2334 [inline]
 __se_sys_clone kernel/fork.c:2328 [inline]
 __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f5a8c694f46
Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 14 25 10 00 00 00 31 d2 49 81 c2 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 31 01 00 00 85 c0 41 89 c4 0f 85 3b 01 00
RSP: 002b:00007ffeef69bfb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffeef69bfb0 RCX: 00007f5a8c694f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffeef69c010 R08: 0000000000007075 R09: 0000000000007075
R10: 00007f5a8cfb1a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeef69bfd0 R14: 0000000000000005 R15: 0000000000000005
Kernel Offset: disabled