[....] Starting enhanced syslogd: rsyslogd[ 13.205296] audit: type=1400 audit(1515886578.331:5): avc: denied { syslog } for pid=3501 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: [ 18.782376] audit: type=1400 audit(1515886583.909:6): avc: denied { map } for pid=3640 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 '10.128.15.243' (ECDSA) to the list of known hosts. executing program [ 25.005112] audit: type=1400 audit(1515886590.131:7): avc: denied { map } for pid=3654 comm="syzkaller772480" path="/root/syzkaller772480236" 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 [ 25.040506] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.073304] kasan: CONFIG_KASAN_INLINE enabled [ 25.077945] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.085281] general protection fault: 0000 [#1] SMP KASAN [ 25.090790] Dumping ftrace buffer: [ 25.094297] (ftrace buffer empty) [ 25.097987] Modules linked in: [ 25.101154] CPU: 0 PID: 3657 Comm: syzkaller772480 Not tainted 4.15.0-rc7+ #170 [ 25.108569] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.118577] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.123215] RSP: 0018:ffff8801d99e6fa8 EFLAGS: 00010093 [ 25.128558] RAX: ffff8801d9ada280 RBX: 00000000001606f0 RCX: ffffffff811a32b2 [ 25.135809] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.143051] RBP: ffff8801d99e6fa8 R08: 1ffff1003b33cd51 R09: 0000000000000004 [ 25.150298] R10: ffff8801d99e6f18 R11: 0000000000000004 R12: 0000000000000093 [ 25.157540] R13: ffff8801d9ada280 R14: ffff8801db21d130 R15: ffff8801db21d130 [ 25.164784] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.172979] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.178830] CR2: 0000000000000000 CR3: 0000000006822004 CR4: 00000000001626f0 [ 25.186075] Call Trace: [ 25.188639] hardware_disable+0x34a/0x4b0 [ 25.192763] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.197232] kvm_arch_hardware_disable+0x35/0xd0 [ 25.201958] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.206422] hardware_disable_nolock+0x30/0x40 [ 25.210979] on_each_cpu+0xca/0x1b0 [ 25.214577] hardware_disable_all_nolock+0x3e/0x50 [ 25.219487] kvm_put_kvm+0x956/0xdf0 [ 25.223175] ? kvm_clear_guest+0xb0/0xb0 [ 25.227223] ? kvm_irqfd_release+0xd1/0x120 [ 25.231518] ? lock_downgrade+0x980/0x980 [ 25.235649] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.240118] ? kvm_irqfd_release+0xdd/0x120 [ 25.244407] ? kvm_irqfd_release+0xdd/0x120 [ 25.249482] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.253340] kvm_vm_release+0x42/0x50 [ 25.257113] __fput+0x327/0x7e0 [ 25.260365] ? fput+0x140/0x140 [ 25.263626] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.269481] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.273950] ____fput+0x15/0x20 [ 25.277200] task_work_run+0x199/0x270 [ 25.281062] ? task_work_cancel+0x210/0x210 [ 25.285361] ? _raw_spin_unlock+0x22/0x30 [ 25.289482] ? switch_task_namespaces+0x87/0xc0 [ 25.294134] do_exit+0x9bb/0x1ad0 [ 25.297567] ? find_held_lock+0x35/0x1d0 [ 25.301614] ? mm_update_next_owner+0x930/0x930 [ 25.306263] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.311437] ? lock_downgrade+0x980/0x980 [ 25.315558] ? __unqueue_futex+0x1c0/0x290 [ 25.319765] ? lock_release+0xa40/0xa40 [ 25.323718] ? fault_in_user_writeable+0x90/0x90 [ 25.328450] ? do_raw_spin_trylock+0x190/0x190 [ 25.333003] ? futex_wake+0x680/0x680 [ 25.336785] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 25.341868] ? futex_wait+0x6a9/0x9a0 [ 25.345645] ? check_noncircular+0x20/0x20 [ 25.349852] ? wake_up_q+0x8a/0xe0 [ 25.353359] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 25.358432] ? futex_wake+0x2ca/0x680 [ 25.362207] ? find_held_lock+0x35/0x1d0 [ 25.366242] ? get_signal+0x7ae/0x16c0 [ 25.370101] ? lock_downgrade+0x980/0x980 [ 25.374224] do_group_exit+0x149/0x400 [ 25.378084] ? do_raw_spin_trylock+0x190/0x190 [ 25.382638] ? SyS_exit+0x30/0x30 [ 25.386063] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.390529] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.395517] get_signal+0x73f/0x16c0 [ 25.399206] ? ptrace_notify+0x130/0x130 [ 25.403244] ? lock_release+0xa40/0xa40 [ 25.407200] ? __lock_is_held+0xb6/0x140 [ 25.411247] ? __fget+0x35c/0x570 [ 25.414711] do_signal+0x90/0x1eb0 [ 25.418231] ? iterate_fd+0x3f0/0x3f0 [ 25.422022] ? setup_sigcontext+0x7d0/0x7d0 [ 25.426322] ? check_noncircular+0x20/0x20 [ 25.430534] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 25.435444] ? selinux_file_ioctl+0x444/0x690 [ 25.439911] ? __fget_light+0x297/0x380 [ 25.443867] ? kvm_vcpu_compat_ioctl+0x1d6/0x450 [ 25.448599] ? exit_to_usermode_loop+0x8c/0x310 [ 25.453243] exit_to_usermode_loop+0x214/0x310 [ 25.457799] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.463307] ? compat_SyS_ioctl+0x77/0x2a30 [ 25.467597] ? lock_downgrade+0x980/0x980 [ 25.471726] ? do_fast_syscall_32+0x156/0xf9d [ 25.476195] do_fast_syscall_32+0xbfd/0xf9d [ 25.480490] ? do_raw_spin_trylock+0x190/0x190 [ 25.485052] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.489611] ? syscall_return_slowpath+0x2ad/0x550 [ 25.494520] ? prepare_exit_to_usermode+0x340/0x340 [ 25.499510] ? sysret32_from_system_call+0x5/0x3b [ 25.504335] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.509154] entry_SYSENTER_compat+0x54/0x63 [ 25.513533] RIP: 0023:0xf7f17c79 [ 25.516869] RSP: 002b:00000000f7eca12c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0 [ 25.524555] RAX: fffffffffffffe00 RBX: 00000000080fb004 RCX: 0000000000000000 [ 25.531797] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000080fb004 [ 25.539040] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 25.546288] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.553534] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.560786] 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 [ 25.579856] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d99e6fa8 [ 25.585980] ---[ end trace e504b22fb21dfaa1 ]--- [ 25.590704] Kernel panic - not syncing: Fatal exception [ 25.596498] Dumping ftrace buffer: [ 25.600014] (ftrace buffer empty) [ 25.603695] Kernel Offset: disabled [ 25.607290] Rebooting in 86400 seconds..