[....] Starting enhanced syslogd: rsyslogd[ 12.349794] audit: type=1400 audit(1512790511.924:5): avc: denied { syslog } for pid=2988 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.817363] audit: type=1400 audit(1512790520.392:6): avc: denied { map } for pid=3129 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added 'ci-upstream-kasan-gce-5,10.128.15.224' (ECDSA) to the list of known hosts. executing program [ 33.120969] audit: type=1400 audit(1512790532.695:7): avc: denied { map } for pid=3144 comm="syzkaller231738" path="/root/syzkaller231738464" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program [ 33.228546] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.584041] pte_list_remove: 0000000033f56ae1 0->BUG [ 33.589327] ------------[ cut here ]------------ [ 33.594052] kernel BUG at arch/x86/kvm/mmu.c:1208! [ 33.598988] invalid opcode: 0000 [#1] SMP KASAN [ 33.603624] Dumping ftrace buffer: [ 33.607133] (ftrace buffer empty) [ 33.610808] Modules linked in: [ 33.613966] CPU: 0 PID: 3324 Comm: syzkaller231738 Not tainted 4.15.0-rc2+ #213 [ 33.621382] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.630705] RIP: 0010:pte_list_remove+0x3ae/0x3c0 [ 33.635510] RSP: 0018:ffff8801c3a86f30 EFLAGS: 00010286 [ 33.640837] RAX: 0000000000000028 RBX: ffff8801c2f20c00 RCX: 0000000000000000 [ 33.648070] RDX: 0000000000000028 RSI: 1ffff10038750da6 RDI: ffffed0038750dda [ 33.655304] RBP: ffff8801c3a86f70 R08: 1ffff10038750d68 R09: 0000000000000000 [ 33.662538] R10: 000000000000000b R11: 0000000000000000 R12: ffff8801c4228000 [ 33.669775] R13: 0000000000000000 R14: ffff8801c4219780 R15: ffff8801c42197a8 [ 33.677008] FS: 0000000000000000(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 33.685197] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.691042] CR2: 0000000020919000 CR3: 00000001c4453000 CR4: 00000000001426f0 [ 33.698278] Call Trace: [ 33.700834] drop_spte+0x15a/0x250 [ 33.704339] mmu_page_zap_pte+0x224/0x340 [ 33.708451] ? kvm_mmu_zap_collapsible_spte+0x3f0/0x3f0 [ 33.713779] ? __lock_is_held+0xbc/0x140 [ 33.717809] kvm_mmu_prepare_zap_page+0x1c5/0x1310 [ 33.722710] ? __is_insn_slot_addr+0x1fc/0x330 [ 33.727258] ? mmio_info_in_cache+0x6b0/0x6b0 [ 33.731717] ? __lock_acquire+0x6e9/0x47f0 [ 33.735917] ? unwind_dump+0x4d0/0x4d0 [ 33.739767] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 33.745617] ? check_noncircular+0x20/0x20 [ 33.749818] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 33.754977] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 33.760130] ? __free_insn_slot+0x5c0/0x5c0 [ 33.764417] ? find_held_lock+0x39/0x1d0 [ 33.768444] ? check_noncircular+0x20/0x20 [ 33.772643] ? kvm_make_all_cpus_request+0x44a/0x580 [ 33.777714] ? gfn_to_pfn_atomic+0x650/0x650 [ 33.782086] ? lock_release+0xda0/0xda0 [ 33.786023] ? __free_insn_slot+0x5c0/0x5c0 [ 33.790311] ? __lock_is_held+0xbc/0x140 [ 33.794338] ? kvm_dying_cpu+0x40/0x40 [ 33.798194] kvm_mmu_invalidate_zap_all_pages+0x4a0/0x680 [ 33.803699] ? kvm_mmu_zap_collapsible_sptes+0xb0/0xb0 [ 33.808937] ? lock_acquire+0x1d5/0x580 [ 33.812875] ? lock_release+0xda0/0xda0 [ 33.816812] ? lock_release+0xda0/0xda0 [ 33.820752] ? kmem_cache_free+0x77/0x280 [ 33.824863] ? kvm_dying_cpu+0x40/0x40 [ 33.828715] kvm_arch_flush_shadow_all+0x15/0x20 [ 33.833435] kvm_mmu_notifier_release+0x59/0x90 [ 33.838065] ? kvm_dying_cpu+0x40/0x40 [ 33.841916] __mmu_notifier_release+0x1d5/0x690 [ 33.846555] ? __mmu_notifier_invalidate_range_end+0x360/0x360 [ 33.852492] ? __khugepaged_exit+0x9a/0x650 [ 33.856781] ? lock_release+0xda0/0xda0 [ 33.860719] ? rcu_pm_notify+0xc0/0xc0 [ 33.864570] ? __khugepaged_exit+0x410/0x650 [ 33.868945] exit_mmap+0x42d/0x530 [ 33.872449] ? SyS_munmap+0x30/0x30 [ 33.876045] ? __khugepaged_exit+0x43d/0x650 [ 33.880418] ? hugepage_madvise+0xf0/0xf0 [ 33.884531] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.890378] ? rcu_note_context_switch+0x710/0x710 [ 33.895271] ? reacquire_held_locks+0x201/0x3e0 [ 33.899903] ? __might_sleep+0x95/0x190 [ 33.903843] mmput+0x223/0x6d0 [ 33.907002] ? get_task_exe_file+0xc0/0xc0 [ 33.911207] ? lock_downgrade+0x980/0x980 [ 33.915319] ? is_current_pgrp_orphaned+0xa0/0xa0 [ 33.920124] ? do_exit+0x8a1/0x1ae0 [ 33.923713] ? rcu_note_context_switch+0x710/0x710 [ 33.928607] ? lock_release+0xda0/0xda0 [ 33.932545] ? __might_sleep+0x95/0x190 [ 33.936483] ? do_raw_spin_trylock+0x190/0x190 [ 33.941029] ? __down_interruptible+0x6b0/0x6b0 [ 33.945660] ? trace_hardirqs_on+0xd/0x10 [ 33.949772] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.954236] do_exit+0x90a/0x1ae0 [ 33.957656] ? __hrtimer_get_remaining+0x1b1/0x1c0 [ 33.962548] ? mm_update_next_owner+0x930/0x930 [ 33.967180] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 33.972076] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.977927] ? rcu_note_context_switch+0x710/0x710 [ 33.982821] ? __might_sleep+0x95/0x190 [ 33.986760] ? do_nanosleep+0x4fc/0x6e0 [ 33.990698] ? schedule_timeout_idle+0x90/0x90 [ 33.995252] ? memset+0x31/0x40 [ 33.998496] ? hrtimer_nanosleep+0x2cc/0x860 [ 34.002868] ? nanosleep_copyout+0x100/0x100 [ 34.007238] ? __might_sleep+0x95/0x190 [ 34.011177] ? kasan_check_write+0x14/0x20 [ 34.015378] ? _copy_from_user+0x99/0x110 [ 34.019490] ? __hrtimer_init+0x140/0x140 [ 34.023614] do_group_exit+0x149/0x400 [ 34.027466] ? SyS_exit+0x30/0x30 [ 34.030881] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.035865] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.040590] SyS_exit_group+0x1d/0x20 [ 34.044374] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 34.049100] RIP: 0033:0x449e09 [ 34.052256] RSP: 002b:00007ffeb384dc18 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 34.059929] RAX: ffffffffffffffda RBX: 00007f8a82130700 RCX: 0000000000449e09 [ 34.067162] RDX: 0000000000448451 RSI: 0000000000000000 RDI: 0000000000000000 [ 34.074397] RBP: 00007ffeb384dbc0 R08: 00000000006de1c0 R09: 0000000000000000 [ 34.081629] R10: 00000000006de144 R11: 0000000000000202 R12: 0000000000000000 [ 34.088863] R13: 00007ffeb384dbbf R14: 00007f8a821309c0 R15: 0000000000000000 [ 34.096107] Code: 19 1d 61 00 48 8b 75 d0 48 c7 c7 e0 60 22 85 e8 31 db 4a 00 0f 0b e8 02 1d 61 00 48 8b 75 d0 48 c7 c7 a0 60 22 85 e8 1a db 4a 00 <0f> 0b 4c 89 ef e8 d8 97 97 00 e9 01 fe ff ff 0f 1f 00 55 48 89 [ 34.115173] RIP: pte_list_remove+0x3ae/0x3c0 RSP: ffff8801c3a86f30 [ 34.121520] ---[ end trace 95101e9a6f0f17c9 ]--- [ 34.126252] Kernel panic - not syncing: Fatal exception [ 34.131923] Dumping ftrace buffer: [ 34.135424] (ftrace buffer empty) [ 34.139099] Kernel Offset: disabled [ 34.142698] Rebooting in 86400 seconds..