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AppArmor WARN cred_label: ((!blob)): 
WARNING: CPU: 1 PID: 7403 at security/apparmor/include/cred.h:30 cred_label security/apparmor/include/cred.h:30 [inline]
WARNING: CPU: 1 PID: 7403 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: 7403 Comm: syz-executor1 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:ffff8880ae7079f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff81688726 RDI: 0000000000000006
RBP: ffff8880ae707a18 R08: ffff88808fe44000 R09: ffff88808fe448c8
R10: ffff88808fe44000 R11: 0000000000000000 R12: ffff8880a05bde00
R13: ffff8880a05bde00 R14: ffff8880a05bde88 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:lock_is_held_type+0x17e/0x210 kernel/locking/lockdep.c:3900
Code: 00 00 00 fc ff df 41 c7 85 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 75 63 48 83 3d 89 ef 2e 08 00 74 30 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e0 5b 41 5c 41 5d 5d c3 48 83 c4
RSP: 0018:ffff8880a8c4f7e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1325076 RBX: 0000000000000282 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff8880a8c4f800 R08: ffff88808fe44000 R09: ffffed1015ce5b90
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: 0000000000000001
R13: ffff88808fe44000 R14: ffff88808fe44000 R15: ffff8880a8c4f8c0
 lock_is_held include/linux/lockdep.h:337 [inline]
 rcu_read_lock_held kernel/rcu/update.c:281 [inline]
 rcu_read_lock_held+0xa3/0xd0 kernel/rcu/update.c:273
 task_css include/linux/cgroup.h:479 [inline]
 mem_cgroup_from_task mm/memcontrol.c:815 [inline]
 get_mem_cgroup_from_mm mm/memcontrol.c:844 [inline]
 get_mem_cgroup_from_mm+0x2c1/0x420 mm/memcontrol.c:827
 get_mem_cgroup_from_current mm/memcontrol.c:890 [inline]
 memcg_kmem_get_cache+0x1aa/0x8c0 mm/memcontrol.c:2558
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3367 [inline]
 kmem_cache_alloc+0x194/0x710 mm/slab.c:3541
 __d_alloc+0xae/0xbe0 fs/dcache.c:1599
 d_alloc+0x99/0x420 fs/dcache.c:1678
 __lookup_hash+0xcd/0x190 fs/namei.c:1542
 filename_create+0x1d6/0x5a0 fs/namei.c:3636
 user_path_create fs/namei.c:3693 [inline]
 do_mkdirat+0xcf/0x2f0 fs/namei.c:3831
 __do_sys_mkdir fs/namei.c:3855 [inline]
 __se_sys_mkdir fs/namei.c:3853 [inline]
 __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3853
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4574b7
Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 3d c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 1d c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc5128a488 EFLAGS: 00000206 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 000000000008b07e RCX: 00000000004574b7
RDX: 00007ffc5128a4d5 RSI: 00000000000001ff RDI: 00007ffc5128a4d0
RBP: 00000000000002ac R08: 0000000000000000 R09: 0000000000000005
R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003
R13: 000000000008ae6f R14: 000000000000011d R15: 0000000000000001
Kernel Offset: disabled
Rebooting in 86400 seconds..