[....] Starting enhanced syslogd: rsyslogd[ 12.429383] audit: type=1400 audit(1515861678.376:5): avc: denied { syslog } for pid=3504 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: [ 20.176261] audit: type=1400 audit(1515861686.123:6): avc: denied { map } for pid=3645 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 '10.128.0.8' (ECDSA) to the list of known hosts. executing program [ 39.344591] audit: type=1400 audit(1515861705.291:7): avc: denied { map } for pid=3662 comm="syzkaller017657" path="/root/syzkaller017657926" 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 [ 39.376567] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 39.399064] kasan: CONFIG_KASAN_INLINE enabled [ 39.403654] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.410986] general protection fault: 0000 [#1] SMP KASAN [ 39.416492] Dumping ftrace buffer: [ 39.420003] (ftrace buffer empty) [ 39.423685] Modules linked in: [ 39.426852] CPU: 1 PID: 3663 Comm: syzkaller017657 Not tainted 4.15.0-rc7-mm1+ #56 [ 39.434526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.443853] RIP: 0010:native_write_cr4+0x4/0x10 [ 39.448488] RSP: 0018:ffff8801d92cf5a0 EFLAGS: 00010093 [ 39.453821] RAX: ffff8801d9476140 RBX: 00000000001606e0 RCX: ffffffff811a4b82 [ 39.461144] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 39.468383] RBP: ffff8801d92cf5a0 R08: 1ffff1003b259e0f R09: 0000000000000004 [ 39.475618] R10: ffff8801d92cf510 R11: 0000000000000004 R12: 0000000000000093 [ 39.482855] R13: ffff8801d9476140 R14: ffff8801db31d130 R15: ffff8801db31d130 [ 39.490091] FS: 00000000015a9880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 39.498287] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.504132] CR2: 0000000000000000 CR3: 0000000006822006 CR4: 00000000001626e0 [ 39.511365] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.518606] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.525845] Call Trace: [ 39.528404] hardware_disable+0x34a/0x4b0 [ 39.532528] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 39.536990] kvm_arch_hardware_disable+0x35/0xd0 [ 39.541710] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 39.546168] hardware_disable_nolock+0x30/0x40 [ 39.550715] on_each_cpu+0xca/0x1b0 [ 39.554305] hardware_disable_all_nolock+0x3e/0x50 [ 39.559197] kvm_put_kvm+0x956/0xde0 [ 39.562880] ? kvm_clear_guest+0xb0/0xb0 [ 39.566907] ? retint_kernel+0x10/0x10 [ 39.570761] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.575759] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.580501] ? kvm_irqfd_release+0xdd/0x120 [ 39.584805] ? kvm_irqfd_release+0xdd/0x120 [ 39.589092] ? kvm_put_kvm+0xde0/0xde0 [ 39.592944] kvm_vm_release+0x42/0x50 [ 39.596716] __fput+0x327/0x7e0 [ 39.599963] ? fput+0x140/0x140 [ 39.603220] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.609082] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.613549] ____fput+0x15/0x20 [ 39.616802] task_work_run+0x199/0x270 [ 39.620655] ? task_work_cancel+0x210/0x210 [ 39.624942] ? _raw_spin_unlock+0x22/0x30 [ 39.629054] ? switch_task_namespaces+0x87/0xc0 [ 39.633692] do_exit+0x9bb/0x1ad0 [ 39.637111] ? lock_downgrade+0x980/0x980 [ 39.641226] ? mm_update_next_owner+0x930/0x930 [ 39.645862] ? do_raw_spin_trylock+0x190/0x190 [ 39.650417] ? do_raw_spin_trylock+0x190/0x190 [ 39.654971] ? trace_hardirqs_off+0xd/0x10 [ 39.659168] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 39.664235] ? try_to_wake_up+0xf9/0x1600 [ 39.668348] ? find_held_lock+0x35/0x1d0 [ 39.672375] ? check_noncircular+0x20/0x20 [ 39.676576] ? migrate_swap_stop+0x970/0x970 [ 39.680949] ? lock_downgrade+0x980/0x980 [ 39.685067] ? find_held_lock+0x35/0x1d0 [ 39.689098] ? do_group_exit+0x318/0x400 [ 39.693121] ? lock_downgrade+0x980/0x980 [ 39.697241] ? wake_up_state+0xb/0x10 [ 39.701005] ? signal_wake_up_state+0x3a/0x40 [ 39.705464] ? zap_other_threads+0x1ca/0x240 [ 39.709842] ? do_raw_spin_trylock+0x190/0x190 [ 39.714393] ? force_sig+0x30/0x30 [ 39.717898] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.722357] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.727339] do_group_exit+0x149/0x400 [ 39.731201] ? do_futex+0x22a0/0x22a0 [ 39.734972] ? SyS_exit+0x30/0x30 [ 39.738391] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.743371] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.748092] SyS_exit_group+0x1d/0x20 [ 39.751857] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 39.756582] RIP: 0033:0x448ab9 [ 39.759740] RSP: 002b:00007ffc21edbab8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 39.767418] RAX: ffffffffffffffda RBX: 00007efd74e26700 RCX: 0000000000448ab9 [ 39.774654] RDX: 0000000000448ab9 RSI: 0000000000000001 RDI: 0000000000000000 [ 39.781890] RBP: 00007ffc21edbaf0 R08: 0000000000000000 R09: 0000000000000000 [ 39.789212] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 [ 39.796448] R13: 00007ffc21edba5f R14: 00007efd74e269c0 R15: 0000000000000001 [ 39.803702] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22 e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d [ 39.822783] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d92cf5a0 [ 39.828906] ---[ end trace d32a1b359b4f9df3 ]--- [ 39.833633] Kernel panic - not syncing: Fatal exception [ 39.838997] Dumping ftrace buffer: [ 39.842519] (ftrace buffer empty) [ 39.846200] Kernel Offset: disabled [ 39.849799] Rebooting in 86400 seconds..