[....] Starting enhanced syslogd: rsyslogd[ 11.011889] audit: type=1400 audit(1514852112.599:5): avc: denied { syslog } for pid=2998 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: [ 16.427400] audit: type=1400 audit(1514852118.015:6): avc: denied { map } for pid=3138 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 '10.128.0.63' (ECDSA) to the list of known hosts. executing program [ 22.629938] audit: type=1400 audit(1514852124.217:7): avc: denied { map } for pid=3152 comm="syzkaller866634" path="/root/syzkaller866634428" 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 [ 22.661397] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 22.678996] kvm [3153]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008f data 0x0 [ 22.687694] kvm [3153]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008e data 0x0 [ 22.696328] kvm [3153]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008d data 0x0 [ 22.704930] kvm [3153]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008c data 0x0 [ 22.718434] kasan: CONFIG_KASAN_INLINE enabled [ 22.723024] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.730353] general protection fault: 0000 [#1] SMP KASAN [ 22.735855] Dumping ftrace buffer: [ 22.739364] (ftrace buffer empty) [ 22.743044] Modules linked in: [ 22.746205] CPU: 0 PID: 3154 Comm: syzkaller866634 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.753877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.763206] RIP: 0010:native_write_cr4+0x4/0x10 [ 22.767837] RSP: 0018:ffff8801c7c0f058 EFLAGS: 00010093 [ 22.773165] RAX: ffff8801cbf4e380 RBX: 00000000001606f0 RCX: ffffffff811a4922 [ 22.780403] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 22.787640] RBP: ffff8801c7c0f058 R08: 1ffff10038f81d67 R09: 0000000000000004 [ 22.794878] R10: ffff8801c7c0efc8 R11: 0000000000000004 R12: 0000000000000093 [ 22.802120] R13: ffff8801cbf4e380 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 22.809366] FS: 00007ff1cf1f2700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.817558] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.823404] CR2: 0000000000000000 CR3: 0000000006422003 CR4: 00000000001626f0 [ 22.830642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.837879] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.845122] Call Trace: [ 22.847685] hardware_disable+0x34a/0x4b0 [ 22.851804] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.856266] kvm_arch_hardware_disable+0x35/0xd0 [ 22.860988] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.865451] hardware_disable_nolock+0x30/0x40 [ 22.870016] on_each_cpu+0xca/0x1b0 [ 22.873609] hardware_disable_all_nolock+0x3e/0x50 [ 22.878502] kvm_put_kvm+0x956/0xde0 [ 22.882184] ? kvm_clear_guest+0xb0/0xb0 [ 22.886213] ? kvm_irqfd_release+0xd1/0x120 [ 22.890499] ? lock_downgrade+0x980/0x980 [ 22.894621] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.899094] ? kvm_irqfd_release+0xdd/0x120 [ 22.903380] ? kvm_irqfd_release+0xdd/0x120 [ 22.907666] ? kvm_put_kvm+0xde0/0xde0 [ 22.911517] kvm_vm_release+0x42/0x50 [ 22.915285] __fput+0x327/0x7e0 [ 22.918542] ? fput+0x140/0x140 [ 22.921788] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.927639] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.932104] ____fput+0x15/0x20 [ 22.935350] task_work_run+0x199/0x270 [ 22.939205] ? task_work_cancel+0x210/0x210 [ 22.943491] ? _raw_spin_unlock+0x22/0x30 [ 22.947602] ? switch_task_namespaces+0x87/0xc0 [ 22.952241] do_exit+0x9bb/0x1ad0 [ 22.955659] ? kvm_arch_vcpu_put+0x1a3/0x3f0 [ 22.960034] ? mm_update_next_owner+0x930/0x930 [ 22.964668] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 22.969823] ? kvm_arch_end_assignment+0x20/0x20 [ 22.974557] ? kick_process+0x110/0x110 [ 22.978496] ? vmx_vcpu_put+0x67/0x80 [ 22.982261] ? kvm_arch_vcpu_put+0x2bb/0x3f0 [ 22.986646] ? vcpu_put+0x25/0x30 [ 22.990066] ? kvm_arch_vcpu_ioctl_run+0x10f7/0x5cb0 [ 22.995144] ? mutex_lock_io_nested+0x1900/0x1900 [ 22.999954] ? find_held_lock+0x35/0x1d0 [ 23.003981] ? check_noncircular+0x20/0x20 [ 23.008195] ? kvm_vcpu_ioctl+0x2c9/0xff0 [ 23.012307] ? lock_downgrade+0x980/0x980 [ 23.016418] ? futex_wait+0x6a9/0x9a0 [ 23.020189] ? find_held_lock+0x35/0x1d0 [ 23.024219] ? get_signal+0x7ae/0x16c0 [ 23.028073] ? lock_downgrade+0x980/0x980 [ 23.032189] do_group_exit+0x149/0x400 [ 23.036052] ? do_raw_spin_trylock+0x190/0x190 [ 23.040599] ? SyS_exit+0x30/0x30 [ 23.044016] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.048477] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.053462] get_signal+0x73f/0x16c0 [ 23.057145] ? ptrace_notify+0x130/0x130 [ 23.061172] ? kvm_vcpu_fault+0x520/0x520 [ 23.065289] ? find_held_lock+0x35/0x1d0 [ 23.069321] ? __fget+0x333/0x570 [ 23.072738] ? lock_downgrade+0x980/0x980 [ 23.076853] do_signal+0x94/0x1ee0 [ 23.080359] ? __lock_is_held+0xb6/0x140 [ 23.084395] ? setup_sigcontext+0x7d0/0x7d0 [ 23.088683] ? __fget+0x35c/0x570 [ 23.092105] ? iterate_fd+0x3f0/0x3f0 [ 23.095872] ? up_read+0x1a/0x40 [ 23.099206] ? __do_page_fault+0x3d6/0xc90 [ 23.103407] ? task_work_run+0x1f4/0x270 [ 23.107450] ? exit_to_usermode_loop+0x8c/0x2f0 [ 23.112098] exit_to_usermode_loop+0x258/0x2f0 [ 23.116645] ? ioctl_preallocate+0x2b0/0x2b0 [ 23.121020] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 23.126526] ? selinux_capable+0x40/0x40 [ 23.130558] syscall_return_slowpath+0x490/0x550 [ 23.135280] ? prepare_exit_to_usermode+0x340/0x340 [ 23.140262] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 23.145165] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.150147] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.154871] entry_SYSCALL_64_fastpath+0x94/0x96 [ 23.159601] RIP: 0033:0x4489d9 [ 23.162755] RSP: 002b:00007ff1cf1f1da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 23.170428] RAX: fffffffffffffffc RBX: 00000000006ddc24 RCX: 00000000004489d9 [ 23.177664] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 23.184901] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 23.192150] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc20 [ 23.199387] R13: 6d766b2f7665642f R14: 00007ff1cf1f29c0 R15: 0000000000000001 [ 23.206640] 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 [ 23.225702] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c7c0f058 [ 23.231814] ---[ end trace 4ed4dc98eac021b7 ]--- [ 23.236533] Kernel panic - not syncing: Fatal exception [ 23.241891] Dumping ftrace buffer: [ 23.245544] (ftrace buffer empty) [ 23.249223] Kernel Offset: disabled [ 23.252822] Rebooting in 86400 seconds..