------------[ cut here ]------------ AppArmor WARN cred_label: ((!blob)): WARNING: CPU: 0 PID: 18195 at security/apparmor/include/cred.h:30 cred_label security/apparmor/include/cred.h:30 [inline] WARNING: CPU: 0 PID: 18195 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: 18195 Comm: syz-executor4 Not tainted 5.0.0-rc2-next-20190115 #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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 5d 69 f2 fd 0f 0b eb a9 e8 64 40 29 fe 48 c7 c6 00 e2 7c 88 48 c7 c7 40 d2 7c 88 e8 41 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: 0018:ffff8880ae6079f8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff81688726 RDI: 0000000000000006 RBP: ffff8880ae607a18 R08: ffff888055816200 R09: ffff888055816aa0 R10: ffff888055816200 R11: 0000000000000000 R12: ffff8880425ceb00 R13: ffff8880425ceb00 R14: ffff8880425ceb88 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 RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101 Code: 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 00 00 48 8b 11 48 RSP: 0018:ffff88806f2eed30 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff888055816200 RBX: ffff88806f2eeff0 RCX: ffffffff81a89c41 RDX: 0000000000000000 RSI: ffffffff81a890c0 RDI: 0000000000000005 RBP: ffff88806f2eed30 R08: ffff888055816200 R09: fffff940002756cf R10: fffff940002756ce R11: ffffea00013ab673 R12: ffffea00016e1480 R13: ffffea00016e1488 R14: 1ffff1100de5ddaa R15: 0000000080000001 compound_head include/linux/page-flags.h:143 [inline] ClearPageReferenced include/linux/page-flags.h:284 [inline] mark_page_accessed+0x870/0x1ee0 mm/swap.c:392 zap_pte_range mm/memory.c:1089 [inline] zap_pmd_range mm/memory.c:1194 [inline] zap_pud_range mm/memory.c:1223 [inline] zap_p4d_range mm/memory.c:1244 [inline] unmap_page_range+0xc95/0x25a0 mm/memory.c:1265 unmap_single_vma+0x19d/0x300 mm/memory.c:1310 unmap_vmas+0x1a8/0x350 mm/memory.c:1342 exit_mmap+0x2d4/0x5d0 mm/mmap.c:3140 __mmput kernel/fork.c:1047 [inline] mmput+0x240/0x640 kernel/fork.c:1068 exit_mm kernel/exit.c:545 [inline] do_exit+0x9d4/0x2b60 kernel/exit.c:861 do_group_exit+0x177/0x430 kernel/exit.c:978 get_signal+0x8b7/0x19c0 kernel/signal.c:2519 do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f064b43cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: fffffffffffffff4 RBX: 00007f064b43cc90 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f064b43d6d4 R13: 00000000004be2a0 R14: 00000000004ce760 R15: 0000000000000005 Kernel Offset: disabled Rebooting in 86400 seconds..