[....] Starting enhanced syslogd: rsyslogd[ 12.465329] audit: type=1400 audit(1514860983.841:5): avc: denied { syslog } for pid=3338 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: [ 18.438088] audit: type=1400 audit(1514860989.813:6): avc: denied { map } for pid=3478 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 '10.128.15.225' (ECDSA) to the list of known hosts. executing program [ 24.656185] audit: type=1400 audit(1514860996.031:7): avc: denied { map } for pid=3492 comm="syzkaller539212" path="/root/syzkaller539212771" 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 [ 24.689928] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.708994] kvm [3493]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008f data 0x0 [ 24.717649] kvm [3493]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008e data 0x0 [ 24.726290] kvm [3493]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008d data 0x0 [ 24.734938] kvm [3493]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008c data 0x0 [ 24.750489] kasan: CONFIG_KASAN_INLINE enabled [ 24.755080] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.762408] general protection fault: 0000 [#1] SMP KASAN [ 24.767912] Dumping ftrace buffer: [ 24.771416] (ftrace buffer empty) [ 24.775092] Modules linked in: [ 24.778255] CPU: 0 PID: 3494 Comm: syzkaller539212 Not tainted 4.15.0-rc6+ #245 [ 24.785664] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.795091] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.800090] RSP: 0018:ffff8801c0b0f068 EFLAGS: 00010093 [ 24.805420] RAX: ffff8801c06e2540 RBX: 00000000001606f0 RCX: ffffffff811a3242 [ 24.812656] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 24.819894] RBP: ffff8801c0b0f068 R08: 1ffff10038161d69 R09: 0000000000000004 [ 24.827142] R10: ffff8801c0b0efd8 R11: 0000000000000004 R12: 0000000000000093 [ 24.834379] R13: ffff8801c06e2540 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 24.841627] FS: 00007f4e989d0700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.849817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.855663] CR2: 0000000000000000 CR3: 0000000006822001 CR4: 00000000001626f0 [ 24.862901] Call Trace: [ 24.865461] hardware_disable+0x34a/0x4b0 [ 24.869578] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.874042] kvm_arch_hardware_disable+0x35/0xd0 [ 24.878762] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.883221] hardware_disable_nolock+0x30/0x40 [ 24.887778] on_each_cpu+0xca/0x1b0 [ 24.891371] hardware_disable_all_nolock+0x3e/0x50 [ 24.896267] kvm_put_kvm+0x956/0xdf0 [ 24.899952] ? kvm_clear_guest+0xb0/0xb0 [ 24.903980] ? kvm_irqfd_release+0xd1/0x120 [ 24.908269] ? lock_downgrade+0x980/0x980 [ 24.912391] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.916854] ? kvm_irqfd_release+0xdd/0x120 [ 24.921139] ? kvm_irqfd_release+0xdd/0x120 [ 24.925426] ? kvm_put_kvm+0xdf0/0xdf0 [ 24.929279] kvm_vm_release+0x42/0x50 [ 24.933047] __fput+0x327/0x7e0 [ 24.936294] ? fput+0x140/0x140 [ 24.939542] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.945390] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.949853] ____fput+0x15/0x20 [ 24.953099] task_work_run+0x199/0x270 [ 24.956953] ? task_work_cancel+0x210/0x210 [ 24.961246] ? _raw_spin_unlock+0x22/0x30 [ 24.965363] ? switch_task_namespaces+0x87/0xc0 [ 24.970001] do_exit+0x9bb/0x1ad0 [ 24.973430] ? mm_update_next_owner+0x930/0x930 [ 24.978067] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.983222] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.988378] ? kvm_clear_async_pf_completion_queue+0x7a0/0x7a0 [ 24.994316] ? check_noncircular+0x20/0x20 [ 24.998519] ? vmx_interrupt_allowed+0x77/0x90 [ 25.003068] ? kvm_sigset_deactivate+0x42/0xb0 [ 25.007618] ? kvm_arch_vcpu_ioctl_run+0x10df/0x5bf0 [ 25.012686] ? get_futex_value_locked+0xc3/0xf0 [ 25.017326] ? find_held_lock+0x35/0x1d0 [ 25.021354] ? check_noncircular+0x20/0x20 [ 25.025556] ? vcpu_put+0x35/0x40 [ 25.028976] ? lock_downgrade+0x980/0x980 [ 25.033101] ? find_held_lock+0x35/0x1d0 [ 25.037132] ? get_signal+0x7ae/0x16c0 [ 25.040987] ? lock_downgrade+0x980/0x980 [ 25.045107] do_group_exit+0x149/0x400 [ 25.048963] ? do_raw_spin_trylock+0x190/0x190 [ 25.053512] ? SyS_exit+0x30/0x30 [ 25.056933] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.061393] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.066377] get_signal+0x73f/0x16c0 [ 25.070062] ? ptrace_notify+0x130/0x130 [ 25.074095] ? find_held_lock+0x35/0x1d0 [ 25.078126] ? __fget+0x333/0x570 [ 25.081546] ? lock_downgrade+0x980/0x980 [ 25.085661] ? find_held_lock+0x35/0x1d0 [ 25.089691] do_signal+0x90/0x1eb0 [ 25.093200] ? __lock_is_held+0xb6/0x140 [ 25.097236] ? setup_sigcontext+0x7d0/0x7d0 [ 25.101531] ? __fget+0x35c/0x570 [ 25.104955] ? iterate_fd+0x3f0/0x3f0 [ 25.108722] ? up_read+0x1a/0x40 [ 25.112056] ? __do_page_fault+0x3d6/0xc90 [ 25.116258] ? task_work_run+0x1f4/0x270 [ 25.120288] ? exit_to_usermode_loop+0x8c/0x310 [ 25.124926] exit_to_usermode_loop+0x214/0x310 [ 25.129473] ? ioctl_preallocate+0x2b0/0x2b0 [ 25.133848] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.139351] ? selinux_capable+0x40/0x40 [ 25.143383] syscall_return_slowpath+0x490/0x550 [ 25.148103] ? prepare_exit_to_usermode+0x340/0x340 [ 25.153089] ? entry_SYSCALL_64_fastpath+0x6d/0x9a [ 25.157984] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.162967] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.167692] entry_SYSCALL_64_fastpath+0x98/0x9a [ 25.172413] RIP: 0033:0x4489d9 [ 25.175582] RSP: 002b:00007f4e989cfda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 25.183253] RAX: fffffffffffffffc RBX: 00000000006ddc24 RCX: 00000000004489d9 [ 25.190487] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 25.197722] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.204958] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc20 [ 25.212193] R13: 6d766b2f7665642f R14: 00007f4e989d09c0 R15: 0000000000000001 [ 25.219436] 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 [ 25.238503] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c0b0f068 [ 25.244619] ---[ end trace 93e95968fc92c980 ]--- [ 25.249338] Kernel panic - not syncing: Fatal exception [ 25.255077] Dumping ftrace buffer: [ 25.258590] (ftrace buffer empty) [ 25.262265] Kernel Offset: disabled [ 25.265865] Rebooting in 86400 seconds..