[....] Starting enhanced syslogd: rsyslogd[ 12.441839] audit: type=1400 audit(1516637165.244:5): avc: denied { syslog } for pid=3502 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.870562] audit: type=1400 audit(1516637171.673:6): avc: denied { map } for pid=3642 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program [ 25.127672] audit: type=1400 audit(1516637177.930:7): avc: denied { map } for pid=3656 comm="syzkaller342071" path="/root/syzkaller342071997" 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 [ 25.163057] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.189736] kasan: CONFIG_KASAN_INLINE enabled [ 25.194364] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.201702] general protection fault: 0000 [#1] SMP KASAN [ 25.207211] Dumping ftrace buffer: [ 25.210727] (ftrace buffer empty) [ 25.214419] Modules linked in: [ 25.217595] CPU: 0 PID: 3658 Comm: syzkaller342071 Not tainted 4.15.0-rc9+ #274 [ 25.225011] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.234362] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.239002] RSP: 0018:ffff8801bb44f068 EFLAGS: 00010093 [ 25.244345] RAX: ffff8801d94cc580 RBX: 00000000001606f0 RCX: ffffffff811a32b2 [ 25.251586] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.258841] RBP: ffff8801bb44f068 R08: 1ffff10037689d69 R09: 0000000000000004 [ 25.266081] R10: ffff8801bb44efd8 R11: 0000000000000004 R12: 0000000000000093 [ 25.273321] R13: ffff8801d94cc580 R14: ffff8801db21d130 R15: ffff8801db21d130 [ 25.280563] FS: 00007f888b7fd700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.288760] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.294620] CR2: 0000000000000000 CR3: 0000000006822003 CR4: 00000000001626f0 [ 25.301867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.309110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.316351] Call Trace: [ 25.318914] hardware_disable+0x34a/0x4b0 [ 25.323036] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.327515] kvm_arch_hardware_disable+0x35/0xd0 [ 25.332243] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.336708] hardware_disable_nolock+0x30/0x40 [ 25.341260] on_each_cpu+0xca/0x1b0 [ 25.344861] hardware_disable_all_nolock+0x3e/0x50 [ 25.349768] kvm_put_kvm+0x956/0xdf0 [ 25.353636] ? kvm_clear_guest+0xb0/0xb0 [ 25.357695] ? kvm_irqfd_release+0xd1/0x120 [ 25.362015] ? lock_downgrade+0x980/0x980 [ 25.366169] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.370656] ? kvm_irqfd_release+0xdd/0x120 [ 25.374957] ? kvm_irqfd_release+0xdd/0x120 [ 25.379275] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.383135] kvm_vm_release+0x42/0x50 [ 25.387004] __fput+0x327/0x7e0 [ 25.390268] ? fput+0x140/0x140 [ 25.393530] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.399394] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.403881] ____fput+0x15/0x20 [ 25.407141] task_work_run+0x199/0x270 [ 25.411010] ? task_work_cancel+0x210/0x210 [ 25.415308] ? _raw_spin_unlock+0x22/0x30 [ 25.419425] ? switch_task_namespaces+0x87/0xc0 [ 25.424068] do_exit+0x9bb/0x1ad0 [ 25.427501] ? mm_update_next_owner+0x930/0x930 [ 25.432164] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.437325] ? __might_sleep+0x95/0x190 [ 25.441273] ? _cond_resched+0x14/0x30 [ 25.445129] ? futex_wait_queue_me+0x527/0x7e0 [ 25.449688] ? refill_pi_state_cache.part.5+0x2f0/0x2f0 [ 25.455053] ? __pv_queued_spin_lock_slowpath+0x1480/0x1480 [ 25.460752] ? find_held_lock+0x35/0x1d0 [ 25.464801] ? get_futex_value_locked+0xc3/0xf0 [ 25.469449] ? futex_wait_setup+0x22e/0x3d0 [ 25.473746] ? futex_wake+0x680/0x680 [ 25.477516] ? check_noncircular+0x20/0x20 [ 25.481721] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 25.486793] ? futex_wait+0x6a9/0x9a0 [ 25.490568] ? find_held_lock+0x35/0x1d0 [ 25.494602] ? retint_kernel+0x10/0x10 [ 25.498461] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.503450] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.508191] do_group_exit+0x149/0x400 [ 25.512079] ? SyS_exit+0x30/0x30 [ 25.515527] ? _raw_spin_unlock_irq+0x56/0x70 [ 25.520000] get_signal+0x73f/0x16c0 [ 25.523701] ? ptrace_notify+0x130/0x130 [ 25.527772] ? exit_robust_list+0x240/0x240 [ 25.532080] ? avc_has_extended_perms+0x7fa/0x12c0 [ 25.536989] ? find_held_lock+0x35/0x1d0 [ 25.541030] ? avc_ss_reset+0x110/0x110 [ 25.544978] ? lock_downgrade+0x980/0x980 [ 25.549100] do_signal+0x90/0x1eb0 [ 25.552617] ? __lock_is_held+0xb6/0x140 [ 25.556670] ? setup_sigcontext+0x7d0/0x7d0 [ 25.560993] ? down_read_killable+0x180/0x180 [ 25.565482] ? exit_to_usermode_loop+0x8c/0x310 [ 25.570135] exit_to_usermode_loop+0x214/0x310 [ 25.574703] ? ioctl_preallocate+0x2b0/0x2b0 [ 25.579111] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.584620] ? selinux_capable+0x40/0x40 [ 25.588657] syscall_return_slowpath+0x490/0x550 [ 25.593392] ? prepare_exit_to_usermode+0x340/0x340 [ 25.598394] ? entry_SYSCALL_64_fastpath+0x73/0xa0 [ 25.603303] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.608314] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.613045] entry_SYSCALL_64_fastpath+0x9e/0xa0 [ 25.617778] RIP: 0033:0x445ea9 [ 25.620942] RSP: 002b:00007f888b7fccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 25.628628] RAX: 0000000000000000 RBX: 00000000006dbc24 RCX: 0000000000445ea9 [ 25.635873] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc24 [ 25.643276] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 25.650517] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.657764] R13: 00007ffe9e4a956f R14: 00007f888b7fd9c0 R15: 0000000000000008 [ 25.665014] 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 [ 25.684090] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bb44f068 [ 25.690211] ---[ end trace 05912959ec16cdd5 ]--- [ 25.694959] Kernel panic - not syncing: Fatal exception [ 25.700715] Dumping ftrace buffer: [ 25.704227] (ftrace buffer empty) [ 25.707996] Kernel Offset: disabled [ 25.711599] Rebooting in 86400 seconds..