[....] Starting enhanced syslogd: rsyslogd[ 12.404124] audit: type=1400 audit(1515292355.992:5): avc: denied { syslog } for pid=3342 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: [ 19.294166] audit: type=1400 audit(1515292362.882:6): avc: denied { map } for pid=3483 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 [ 25.516254] audit: type=1400 audit(1515292369.105:7): avc: denied { map } for pid=3497 comm="syzkaller684799" path="/root/syzkaller684799437" 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 [ 25.560553] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.622086] kasan: CONFIG_KASAN_INLINE enabled [ 25.626716] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.634064] general protection fault: 0000 [#1] SMP KASAN [ 25.639568] Dumping ftrace buffer: [ 25.643072] (ftrace buffer empty) [ 25.646754] Modules linked in: [ 25.649915] CPU: 0 PID: 3499 Comm: syzkaller684799 Not tainted 4.15.0-rc6+ #160 [ 25.657330] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.666656] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.671288] RSP: 0018:ffff8801c01defa8 EFLAGS: 00010093 [ 25.676616] RAX: ffff8801c0386200 RBX: 00000000001606f0 RCX: ffffffff811a32c2 [ 25.683852] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.691087] RBP: ffff8801c01defa8 R08: 1ffff1003803bd51 R09: 0000000000000004 [ 25.698329] R10: ffff8801c01def18 R11: 0000000000000004 R12: 0000000000000093 [ 25.705564] R13: ffff8801c0386200 R14: ffff8801db21d130 R15: ffff8801db21d130 [ 25.712801] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.720999] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.726851] CR2: 0000000000000000 CR3: 0000000006822006 CR4: 00000000001626f0 [ 25.734089] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.741327] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.748562] Call Trace: [ 25.751125] hardware_disable+0x34a/0x4b0 [ 25.755243] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.759708] kvm_arch_hardware_disable+0x35/0xd0 [ 25.764430] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.768898] hardware_disable_nolock+0x30/0x40 [ 25.773447] on_each_cpu+0xca/0x1b0 [ 25.777039] hardware_disable_all_nolock+0x3e/0x50 [ 25.781933] kvm_put_kvm+0x956/0xdf0 [ 25.785626] ? kvm_clear_guest+0xb0/0xb0 [ 25.789662] ? kvm_irqfd_release+0xd1/0x120 [ 25.793951] ? lock_downgrade+0x980/0x980 [ 25.798087] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.802557] ? kvm_irqfd_release+0xdd/0x120 [ 25.806844] ? kvm_irqfd_release+0xdd/0x120 [ 25.811139] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.814993] kvm_vm_release+0x42/0x50 [ 25.818767] __fput+0x327/0x7e0 [ 25.822022] ? fput+0x140/0x140 [ 25.825268] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.831123] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.835587] ____fput+0x15/0x20 [ 25.838839] task_work_run+0x199/0x270 [ 25.842700] ? task_work_cancel+0x210/0x210 [ 25.846995] ? _raw_spin_unlock+0x22/0x30 [ 25.851113] ? switch_task_namespaces+0x87/0xc0 [ 25.855752] do_exit+0x9bb/0x1ad0 [ 25.859175] ? find_held_lock+0x35/0x1d0 [ 25.863216] ? mm_update_next_owner+0x930/0x930 [ 25.867851] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.873014] ? lock_downgrade+0x980/0x980 [ 25.877134] ? __unqueue_futex+0x1c0/0x290 [ 25.881340] ? lock_release+0xa40/0xa40 [ 25.885281] ? fault_in_user_writeable+0x90/0x90 [ 25.890006] ? do_raw_spin_trylock+0x190/0x190 [ 25.894560] ? futex_wake+0x680/0x680 [ 25.898332] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 25.903401] ? futex_wait+0x6a9/0x9a0 [ 25.907174] ? check_noncircular+0x20/0x20 [ 25.911375] ? hash_futex+0x15/0x210 [ 25.915055] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 25.920131] ? futex_wake+0x2ca/0x680 [ 25.923896] ? fd_install+0x4d/0x60 [ 25.927495] ? find_held_lock+0x35/0x1d0 [ 25.931528] ? get_signal+0x7ae/0x16c0 [ 25.935382] ? lock_downgrade+0x980/0x980 [ 25.939501] do_group_exit+0x149/0x400 [ 25.943362] ? do_raw_spin_trylock+0x190/0x190 [ 25.947921] ? SyS_exit+0x30/0x30 [ 25.951346] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.955816] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.960806] get_signal+0x73f/0x16c0 [ 25.964492] ? ptrace_notify+0x130/0x130 [ 25.968519] ? lock_release+0xa40/0xa40 [ 25.972460] ? __lock_is_held+0xb6/0x140 [ 25.976493] ? __fget+0x35c/0x570 [ 25.979915] do_signal+0x90/0x1eb0 [ 25.983421] ? iterate_fd+0x3f0/0x3f0 [ 25.987194] ? free_obj_work+0x690/0x690 [ 25.991223] ? __fd_install+0x288/0x740 [ 25.995165] ? setup_sigcontext+0x7d0/0x7d0 [ 25.999451] ? may_open_dev+0xe0/0xe0 [ 26.003220] ? rcu_pm_notify+0xc0/0xc0 [ 26.007073] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.011969] ? selinux_file_ioctl+0x444/0x690 [ 26.016431] ? __fget_light+0x297/0x380 [ 26.020381] ? kvm_vm_compat_ioctl+0x29a/0x3f0 [ 26.024930] ? kmem_cache_free+0x267/0x2a0 [ 26.029137] ? exit_to_usermode_loop+0x8c/0x310 [ 26.033774] exit_to_usermode_loop+0x214/0x310 [ 26.038331] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.043841] ? compat_SyS_ioctl+0x77/0x2a30 [ 26.048128] ? do_fast_syscall_32+0x156/0xf9d [ 26.052598] do_fast_syscall_32+0xbfd/0xf9d [ 26.056891] ? do_int80_syscall_32+0x9d0/0x9d0 [ 26.061448] ? syscall_return_slowpath+0x2ad/0x550 [ 26.066353] ? prepare_exit_to_usermode+0x340/0x340 [ 26.071337] ? sysret32_from_system_call+0x5/0x3b [ 26.076152] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.080965] entry_SYSENTER_compat+0x54/0x63 [ 26.085339] RIP: 0023:0xf7fb3c79 [ 26.088668] RSP: 002b:00000000f7faf1dc EFLAGS: 00000296 ORIG_RAX: 00000000000000f0 [ 26.096346] RAX: fffffffffffffe00 RBX: 00000000080fafe4 RCX: 0000000000000000 [ 26.103590] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000080fafe4 [ 26.110832] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 26.118072] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.125311] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.132557] 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 [ 26.152384] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c01defa8 [ 26.158500] ---[ end trace c717a16f97f3c7f2 ]--- [ 26.163219] Kernel panic - not syncing: Fatal exception [ 26.168990] Dumping ftrace buffer: [ 26.172503] (ftrace buffer empty) [ 26.176178] Kernel Offset: disabled [ 26.179771] Rebooting in 86400 seconds..