[....] Starting enhanced syslogd: rsyslogd[ 13.271140] audit: type=1400 audit(1512845274.981:5): avc: denied { syslog } for pid=2993 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: [ 20.030676] audit: type=1400 audit(1512845281.741:6): avc: denied { map } for pid=3136 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-3,10.128.0.18' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.214649] audit: type=1400 audit(1512845308.925:7): avc: denied { map } for pid=3153 comm="syzkaller540288" path="/root/syzkaller540288169" 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 [ 47.269602] 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 48.303024] pte_list_remove: 000000001e71be7c 0->BUG [ 48.308310] ------------[ cut here ]------------ [ 48.313042] kernel BUG at arch/x86/kvm/mmu.c:1208! [ 48.318021] invalid opcode: 0000 [#1] SMP KASAN [ 48.322665] Dumping ftrace buffer: [ 48.326172] (ftrace buffer empty) [ 48.329849] Modules linked in: [ 48.333012] CPU: 1 PID: 4138 Comm: syzkaller540288 Not tainted 4.15.0-rc2-next-20171208+ #63 [ 48.341550] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.350884] RIP: 0010:pte_list_remove+0x3ae/0x3c0 [ 48.355690] RSP: 0018:ffff8801d8366f30 EFLAGS: 00010286 [ 48.361019] RAX: 0000000000000028 RBX: ffff8801d6279400 RCX: 0000000000000000 [ 48.368256] RDX: 0000000000000028 RSI: 1ffff1003b06cda6 RDI: ffffed003b06cdda [ 48.375492] RBP: ffff8801d8366f70 R08: 1ffff1003b06cd68 R09: 0000000000000000 [ 48.382730] R10: 000000000000000b R11: 0000000000000000 R12: ffff8801d7bc1000 [ 48.389973] R13: 0000000000000000 R14: ffff8801d7470b20 R15: ffff8801d7470b48 [ 48.397761] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 48.405956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.411804] CR2: 00007f5041d95000 CR3: 00000001c32f3000 CR4: 00000000001426e0 [ 48.419044] Call Trace: [ 48.421604] drop_spte+0x15a/0x250 [ 48.425114] mmu_page_zap_pte+0x224/0x340 [ 48.429232] ? kvm_mmu_zap_collapsible_spte+0x3f0/0x3f0 [ 48.434566] ? __lock_is_held+0xbc/0x140 [ 48.438602] kvm_mmu_prepare_zap_page+0x1c5/0x1310 [ 48.443500] ? __is_insn_slot_addr+0x1fc/0x330 [ 48.448054] ? mmio_info_in_cache+0x6b0/0x6b0 [ 48.452515] ? __lock_acquire+0x6e9/0x47f0 [ 48.456715] ? unwind_dump+0x4d0/0x4d0 [ 48.460567] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 48.466430] ? check_noncircular+0x20/0x20 [ 48.470635] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 48.475793] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 48.480951] ? __free_insn_slot+0x5c0/0x5c0 [ 48.485241] ? find_held_lock+0x39/0x1d0 [ 48.489268] ? check_noncircular+0x20/0x20 [ 48.493471] ? kvm_make_all_cpus_request+0x44a/0x580 [ 48.498544] ? gfn_to_pfn_atomic+0x650/0x650 [ 48.502921] ? lock_release+0xda0/0xda0 [ 48.506861] ? __free_insn_slot+0x5c0/0x5c0 [ 48.511153] ? __lock_is_held+0xbc/0x140 [ 48.515182] ? kvm_dying_cpu+0x40/0x40 [ 48.519038] kvm_mmu_invalidate_zap_all_pages+0x4a0/0x680 [ 48.524546] ? kvm_mmu_zap_collapsible_sptes+0xb0/0xb0 [ 48.529791] ? lock_acquire+0x1d5/0x580 [ 48.533737] ? lock_release+0xda0/0xda0 [ 48.537678] ? lock_release+0xda0/0xda0 [ 48.541621] ? kmem_cache_free+0x77/0x280 [ 48.545737] ? kvm_dying_cpu+0x40/0x40 [ 48.549595] kvm_arch_flush_shadow_all+0x15/0x20 [ 48.554319] kvm_mmu_notifier_release+0x59/0x90 [ 48.558957] ? kvm_dying_cpu+0x40/0x40 [ 48.562812] __mmu_notifier_release+0x1d5/0x690 [ 48.567450] ? __mmu_notifier_invalidate_range_end+0x360/0x360 [ 48.573393] ? __khugepaged_exit+0x9a/0x640 [ 48.577685] ? lock_release+0xda0/0xda0 [ 48.581626] ? rcu_pm_notify+0xc0/0xc0 [ 48.585484] ? __khugepaged_exit+0x40f/0x640 [ 48.589862] exit_mmap+0x42d/0x530 [ 48.593369] ? SyS_munmap+0x30/0x30 [ 48.596970] ? __khugepaged_exit+0x42f/0x640 [ 48.601345] ? hugepage_madvise+0xf0/0xf0 [ 48.605458] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 48.611308] ? rcu_note_context_switch+0x710/0x710 [ 48.616204] ? reacquire_held_locks+0x201/0x3e0 [ 48.620840] ? __might_sleep+0x95/0x190 [ 48.624785] mmput+0x223/0x6c0 [ 48.627950] ? get_task_exe_file+0xc0/0xc0 [ 48.632152] ? lock_downgrade+0x980/0x980 [ 48.636267] ? is_current_pgrp_orphaned+0xa0/0xa0 [ 48.641074] ? do_exit+0x8a1/0x1ae0 [ 48.644665] ? rcu_note_context_switch+0x710/0x710 [ 48.649563] ? lock_release+0xda0/0xda0 [ 48.653501] ? __might_sleep+0x95/0x190 [ 48.657444] ? do_raw_spin_trylock+0x190/0x190 [ 48.661995] ? __down_interruptible+0x6b0/0x6b0 [ 48.666628] ? trace_hardirqs_on+0xd/0x10 [ 48.670743] ? _raw_spin_unlock_irq+0x27/0x70 [ 48.675208] do_exit+0x90a/0x1ae0 [ 48.678632] ? hrtimer_try_to_cancel+0x11/0x5c0 [ 48.683267] ? mm_update_next_owner+0x930/0x930 [ 48.687904] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 48.692801] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 48.698650] ? _do_fork+0x2ae/0xf10 [ 48.702246] ? rcu_note_context_switch+0x710/0x710 [ 48.707139] ? fork_idle+0x2d0/0x2d0 [ 48.710819] ? __might_sleep+0x95/0x190 [ 48.714761] ? do_nanosleep+0x4fc/0x6e0 [ 48.718703] ? schedule_timeout_idle+0x90/0x90 [ 48.723258] ? memset+0x31/0x40 [ 48.726508] ? hrtimer_nanosleep+0x2cc/0x860 [ 48.730882] ? nanosleep_copyout+0x100/0x100 [ 48.735258] ? __might_sleep+0x95/0x190 [ 48.739200] ? kasan_check_write+0x14/0x20 [ 48.743400] ? _copy_from_user+0x99/0x110 [ 48.747517] ? __hrtimer_init+0x140/0x140 [ 48.751633] ? syscall_return_slowpath+0x550/0x550 [ 48.756533] do_group_exit+0x149/0x400 [ 48.760387] ? SyS_exit+0x30/0x30 [ 48.763806] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 48.768788] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.773510] SyS_exit_group+0x1d/0x20 [ 48.777277] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 48.781997] RIP: 0033:0x449c79 [ 48.785152] RSP: 002b:00007ffd641b0528 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 48.792824] RAX: ffffffffffffffda RBX: 00007f846e199700 RCX: 0000000000449c79 [ 48.800058] RDX: 0000000000448301 RSI: 0000000000000000 RDI: 0000000000000000 [ 48.807293] RBP: 00007ffd641b04d0 R08: 00000000006de1c0 R09: 0000000000000000 [ 48.814530] R10: 00000000006de144 R11: 0000000000000206 R12: 0000000000000000 [ 48.821768] R13: 00007ffd641b04cf R14: 00007f846e1999c0 R15: 0000000000000000 [ 48.829010] 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 [ 48.848074] RIP: pte_list_remove+0x3ae/0x3c0 RSP: ffff8801d8366f30 [ 48.854429] ---[ end trace 30cd97b5ac562fe6 ]--- [ 48.859171] Kernel panic - not syncing: Fatal exception [ 48.864533] Dumping ftrace buffer: [ 48.868044] (ftrace buffer empty) [ 48.871726] Kernel Offset: disabled [ 48.875320] Rebooting in 86400 seconds..