[....] Starting enhanced syslogd: rsyslogd[ 11.770309] audit: type=1400 audit(1512795545.375:5): avc: denied { syslog } for pid=2998 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 35.980462] audit: type=1400 audit(1512795569.585:6): avc: denied { map } for pid=3143 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-next-kasan-gce-8,10.128.0.37' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program [ 43.808130] audit: type=1400 audit(1512795577.412:7): avc: denied { map } for pid=3155 comm="syzkaller508693" path="/root/syzkaller508693446" 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 [ 43.862233] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.244515] pte_list_remove: 000000009c905678 0->BUG [ 44.249731] ------------[ cut here ]------------ [ 44.254457] kernel BUG at arch/x86/kvm/mmu.c:1208! [ 44.259411] invalid opcode: 0000 [#1] SMP KASAN [ 44.264045] Dumping ftrace buffer: [ 44.267548] (ftrace buffer empty) [ 44.271223] Modules linked in: [ 44.274383] CPU: 0 PID: 3426 Comm: syzkaller508693 Not tainted 4.15.0-rc2-next-20171208+ #63 [ 44.282921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.292254] RIP: 0010:pte_list_remove+0x3ae/0x3c0 [ 44.297057] RSP: 0018:ffff8801c1726f30 EFLAGS: 00010286 [ 44.302386] RAX: 0000000000000028 RBX: ffff8801dad5c700 RCX: 0000000000000000 [ 44.309621] RDX: 0000000000000028 RSI: 1ffff100382e4da6 RDI: ffffed00382e4dda [ 44.316858] RBP: ffff8801c1726f70 R08: 1ffff100382e4d68 R09: 0000000000000000 [ 44.324093] R10: 000000000000000b R11: 0000000000000000 R12: ffff8801bf6bd000 [ 44.331326] R13: 0000000000000000 R14: ffff8801bf6be2b8 R15: ffff8801bf6be2e0 [ 44.338563] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 44.346756] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.352602] CR2: 00007fe14e707000 CR3: 00000001c1b86000 CR4: 00000000001426f0 [ 44.359837] Call Trace: [ 44.362395] drop_spte+0x15a/0x250 [ 44.365903] mmu_page_zap_pte+0x224/0x340 [ 44.370017] ? kvm_mmu_zap_collapsible_spte+0x3f0/0x3f0 [ 44.375348] ? __lock_is_held+0xbc/0x140 [ 44.379386] kvm_mmu_prepare_zap_page+0x1c5/0x1310 [ 44.384282] ? __is_insn_slot_addr+0x1fc/0x330 [ 44.388832] ? mmio_info_in_cache+0x6b0/0x6b0 [ 44.393292] ? __lock_acquire+0x6e9/0x47f0 [ 44.397491] ? unwind_dump+0x4d0/0x4d0 [ 44.401340] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 44.407190] ? check_noncircular+0x20/0x20 [ 44.411392] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 44.416555] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 44.421712] ? __free_insn_slot+0x5c0/0x5c0 [ 44.426004] ? check_noncircular+0x20/0x20 [ 44.430205] ? kvm_make_all_cpus_request+0x44a/0x580 [ 44.435275] ? gfn_to_pfn_atomic+0x650/0x650 [ 44.439646] ? lock_release+0xda0/0xda0 [ 44.443586] ? __free_insn_slot+0x5c0/0x5c0 [ 44.447873] ? __lock_is_held+0xbc/0x140 [ 44.451902] ? kvm_dying_cpu+0x40/0x40 [ 44.455757] kvm_mmu_invalidate_zap_all_pages+0x4a0/0x680 [ 44.461266] ? kvm_mmu_zap_collapsible_sptes+0xb0/0xb0 [ 44.466509] ? lock_acquire+0x1d5/0x580 [ 44.470447] ? lock_release+0xda0/0xda0 [ 44.474388] ? lock_release+0xda0/0xda0 [ 44.478328] ? save_stack+0x43/0xd0 [ 44.481923] ? kmem_cache_free+0x77/0x280 [ 44.486037] ? kvm_dying_cpu+0x40/0x40 [ 44.489887] kvm_arch_flush_shadow_all+0x15/0x20 [ 44.494611] kvm_mmu_notifier_release+0x59/0x90 [ 44.499247] ? kvm_dying_cpu+0x40/0x40 [ 44.503099] __mmu_notifier_release+0x1d5/0x690 [ 44.507739] ? __mmu_notifier_invalidate_range_end+0x360/0x360 [ 44.513690] ? __khugepaged_exit+0x9a/0x640 [ 44.517983] ? lock_release+0xda0/0xda0 [ 44.521925] ? rcu_pm_notify+0xc0/0xc0 [ 44.525783] ? __khugepaged_exit+0x40f/0x640 [ 44.530163] exit_mmap+0x42d/0x530 [ 44.533670] ? SyS_munmap+0x30/0x30 [ 44.537261] ? __khugepaged_exit+0x42f/0x640 [ 44.541637] ? hugepage_madvise+0xf0/0xf0 executing program [ 44.545751] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 44.551607] ? rcu_note_context_switch+0x710/0x710 [ 44.556501] ? reacquire_held_locks+0x201/0x3e0 [ 44.561137] ? __might_sleep+0x95/0x190 [ 44.565078] mmput+0x223/0x6c0 [ 44.568235] ? get_task_exe_file+0xc0/0xc0 [ 44.572433] ? lock_downgrade+0x980/0x980 [ 44.576544] ? is_current_pgrp_orphaned+0xa0/0xa0 [ 44.581348] ? do_exit+0x8a1/0x1ae0 [ 44.584939] ? rcu_note_context_switch+0x710/0x710 [ 44.589839] ? lock_release+0xda0/0xda0 [ 44.593778] ? __might_sleep+0x95/0x190 [ 44.597718] ? do_raw_spin_trylock+0x190/0x190 [ 44.602265] ? __down_interruptible+0x6b0/0x6b0 [ 44.606918] ? trace_hardirqs_on+0xd/0x10 [ 44.611030] ? _raw_spin_unlock_irq+0x27/0x70 [ 44.615496] do_exit+0x90a/0x1ae0 [ 44.618920] ? hrtimer_try_to_cancel+0x11/0x5c0 [ 44.623553] ? mm_update_next_owner+0x930/0x930 [ 44.628186] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 44.633086] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 44.638932] ? _do_fork+0x2ae/0xf10 executing program [ 44.642527] ? rcu_note_context_switch+0x710/0x710 [ 44.647420] ? fork_idle+0x2d0/0x2d0 [ 44.651103] ? __might_sleep+0x95/0x190 [ 44.655050] ? do_nanosleep+0x4fc/0x6e0 [ 44.658992] ? schedule_timeout_idle+0x90/0x90 [ 44.663547] ? memset+0x31/0x40 [ 44.666795] ? hrtimer_nanosleep+0x2cc/0x860 [ 44.671168] ? nanosleep_copyout+0x100/0x100 [ 44.675540] ? __might_sleep+0x95/0x190 [ 44.679481] ? kasan_check_write+0x14/0x20 [ 44.683686] ? _copy_from_user+0x99/0x110 [ 44.687800] ? __hrtimer_init+0x140/0x140 [ 44.691918] ? syscall_return_slowpath+0x550/0x550 [ 44.696814] do_group_exit+0x149/0x400 [ 44.700669] ? SyS_exit+0x30/0x30 [ 44.704089] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 44.709072] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.713794] SyS_exit_group+0x1d/0x20 [ 44.717561] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 44.722282] RIP: 0033:0x448b09 [ 44.725436] RSP: 002b:00007ffc83038d88 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 44.733105] RAX: ffffffffffffffda RBX: 00007fc6bce71700 RCX: 0000000000448b09 executing program [ 44.740340] RDX: 00000000004472e1 RSI: 0000000000000000 RDI: 0000000000000000 [ 44.747575] RBP: 00007ffc83038d30 R08: 00000000006debc0 R09: 0000000000000000 [ 44.754809] R10: 00000000006deb44 R11: 0000000000000206 R12: 0000000000000000 [ 44.762047] R13: 00007ffc83038d2f R14: 00007fc6bce719c0 R15: 0000000000000000 [ 44.769287] Code: 09 1e 61 00 48 8b 75 d0 48 c7 c7 00 61 62 85 e8 f1 da 4a 00 0f 0b e8 f2 1d 61 00 48 8b 75 d0 48 c7 c7 c0 60 62 85 e8 da da 4a 00 <0f> 0b 4c 89 ef e8 a8 b3 97 00 e9 01 fe ff ff 0f 1f 00 55 48 89 [ 44.788352] RIP: pte_list_remove+0x3ae/0x3c0 RSP: ffff8801c1726f30 [ 44.794728] ---[ end trace 63b4696ad5649b3f ]--- [ 44.799461] Kernel panic - not syncing: Fatal exception [ 44.805130] Dumping ftrace buffer: [ 44.808637] (ftrace buffer empty) [ 44.812312] Kernel Offset: disabled [ 44.815904] Rebooting in 86400 seconds..