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AppArmor WARN cred_label: ((!blob)): 
WARNING: CPU: 1 PID: 10367 at security/apparmor/include/cred.h:30 cred_label security/apparmor/include/cred.h:30 [inline]
WARNING: CPU: 1 PID: 10367 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: 10367 Comm: syz-executor4 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: 0000:ffff8880ae7079f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff81688726 RDI: 0000000000000006
RBP: ffff8880ae707a18 R08: ffff8880892ce340 R09: ffff8880892cebe0
R10: ffff8880892ce340 R11: 0000000000000000 R12: ffff8880870b9b00
R13: ffff8880870b9b00 R14: ffff8880870b9b88 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:__zone_watermark_ok+0x0/0x7a0 mm/page_alloc.c:3383
Code: c7 c7 b0 83 92 89 e8 ef 40 22 00 e9 bc f7 ff ff 48 c7 c7 a8 83 92 89 e8 de 40 22 00 e9 e1 f7 ff ff 66 0f 1f 84 00 00 00 00 00 <55> 45 89 c3 48 89 e5 41 57 41 83 e3 18 4c 8d 95 18 ff ff ff 41 56
RSP: 0000:ffff8880567bf338 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000208 RBX: 0000000000000002 RCX: 0000000000000002
RDX: 0000000000000208 RSI: 0000000000000000 RDI: ffff88812fffcd00
RBP: ffff8880567bf920 R08: 0000000000000281 R09: 00000000000001c1
R10: ffffed1025fffa58 R11: ffff88812fffd2c7 R12: 0000000000000208
R13: 0000000000000002 R14: 00000000000001c1 R15: dffffc0000000000
 __alloc_pages_nodemask+0x4fd/0xdc0 mm/page_alloc.c:4714
 alloc_pages_vma+0xdd/0x540 mm/mempolicy.c:2070
 alloc_zeroed_user_highpage_movable include/linux/highmem.h:208 [inline]
 do_anonymous_page mm/memory.c:2947 [inline]
 handle_pte_fault mm/memory.c:3803 [inline]
 __handle_mm_fault+0x2582/0x5610 mm/memory.c:3929
 handle_mm_fault+0x4ec/0xc80 mm/memory.c:3966
 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline]
 __do_page_fault+0x5ef/0xda0 arch/x86/mm/fault.c:1541
 do_page_fault+0xe6/0x7d8 arch/x86/mm/fault.c:1572
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143
RIP: 0033:0x40f8ef
Code: 0f 84 c8 02 00 00 48 83 bd 78 ff ff ff 00 0f 84 f9 04 00 00 48 8b 95 68 ff ff ff 44 89 95 38 ff ff ff 4c 8d ac 10 00 f7 ff ff <49> 89 85 90 06 00 00 49 8d 85 10 03 00 00 49 89 95 98 06 00 00 41
RSP: 002b:00007ffdafbeb830 EFLAGS: 00010206
RAX: 00007effd2293000 RBX: 0000000000020000 RCX: 0000000000457f1a
RDX: 0000000000021000 RSI: 0000000000021000 RDI: 0000000000000000
RBP: 00007ffdafbeb910 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdafbeb9f0
R13: 00007effd22b3700 R14: 000000000073bfac R15: 000000000073bfac
Kernel Offset: disabled
Rebooting in 86400 seconds..