[....] Starting enhanced syslogd: rsyslogd[ 12.974986] audit: type=1400 audit(1515864652.459:5): avc: denied { syslog } for pid=3500 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: [ 19.380849] audit: type=1400 audit(1515864658.865:6): avc: denied { map } for pid=3641 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program [ 25.575318] audit: type=1400 audit(1515864665.060:7): avc: denied { map } for pid=3655 comm="syzkaller814794" path="/root/syzkaller814794841" 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 [ 25.609580] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.629779] kvm [3656]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008f data 0xb200000000 [ 25.639262] kvm [3656]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008e data 0xb200000000 [ 25.648722] kvm [3656]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008d data 0xb200000000 [ 25.665026] kasan: CONFIG_KASAN_INLINE enabled [ 25.669648] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.676988] general protection fault: 0000 [#1] SMP KASAN [ 25.682494] Dumping ftrace buffer: [ 25.685999] (ftrace buffer empty) [ 25.689682] Modules linked in: [ 25.692852] CPU: 0 PID: 3657 Comm: syzkaller814794 Not tainted 4.15.0-rc7+ #260 [ 25.700264] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.709606] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.714242] RSP: 0018:ffff8801bc747068 EFLAGS: 00010093 [ 25.719575] RAX: ffff8801d9a78240 RBX: 00000000001606f0 RCX: ffffffff811a32b2 [ 25.726816] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.734061] RBP: ffff8801bc747068 R08: 1ffff100378e8d69 R09: 0000000000000004 [ 25.741301] R10: ffff8801bc746fd8 R11: 0000000000000004 R12: 0000000000000093 [ 25.748543] R13: ffff8801d9a78240 R14: ffff8801db21d130 R15: ffff8801db21d130 [ 25.755790] FS: 00007fd728f80700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.763990] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.769843] CR2: 0000000000000000 CR3: 0000000006822003 CR4: 00000000001626f0 [ 25.777268] Call Trace: [ 25.779834] hardware_disable+0x34a/0x4b0 [ 25.783982] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.788449] kvm_arch_hardware_disable+0x35/0xd0 [ 25.793269] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.797752] hardware_disable_nolock+0x30/0x40 [ 25.802317] on_each_cpu+0xca/0x1b0 [ 25.805963] hardware_disable_all_nolock+0x3e/0x50 [ 25.810878] kvm_put_kvm+0x956/0xdf0 [ 25.814567] ? kvm_clear_guest+0xb0/0xb0 [ 25.818607] ? kvm_irqfd_release+0xd1/0x120 [ 25.822902] ? lock_downgrade+0x980/0x980 [ 25.827037] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.831507] ? kvm_irqfd_release+0xdd/0x120 [ 25.835801] ? kvm_irqfd_release+0xdd/0x120 [ 25.840104] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.843963] kvm_vm_release+0x42/0x50 [ 25.847743] __fput+0x327/0x7e0 [ 25.851000] ? fput+0x140/0x140 [ 25.854257] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.860116] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.864587] ____fput+0x15/0x20 [ 25.867839] task_work_run+0x199/0x270 [ 25.871704] ? task_work_cancel+0x210/0x210 [ 25.876003] ? _raw_spin_unlock+0x22/0x30 [ 25.880128] ? switch_task_namespaces+0x87/0xc0 [ 25.884772] do_exit+0x9bb/0x1ad0 [ 25.888202] ? mm_update_next_owner+0x930/0x930 [ 25.892847] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.898025] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.903188] ? kvm_clear_async_pf_completion_queue+0x7a0/0x7a0 [ 25.909133] ? check_noncircular+0x20/0x20 [ 25.913343] ? vmx_interrupt_allowed+0x77/0x90 [ 25.917898] ? kvm_sigset_deactivate+0x42/0xb0 [ 25.922458] ? kvm_arch_vcpu_ioctl_run+0x10df/0x5bf0 [ 25.927537] ? get_futex_value_locked+0xc3/0xf0 [ 25.932184] ? find_held_lock+0x35/0x1d0 [ 25.936220] ? check_noncircular+0x20/0x20 [ 25.940434] ? vcpu_put+0x35/0x40 [ 25.944124] ? lock_downgrade+0x980/0x980 [ 25.948263] ? find_held_lock+0x35/0x1d0 [ 25.952300] ? get_signal+0x7ae/0x16c0 [ 25.956166] ? lock_downgrade+0x980/0x980 [ 25.960290] do_group_exit+0x149/0x400 [ 25.964153] ? do_raw_spin_trylock+0x190/0x190 [ 25.968707] ? SyS_exit+0x30/0x30 [ 25.972130] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.976599] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.981590] get_signal+0x73f/0x16c0 [ 25.985286] ? ptrace_notify+0x130/0x130 [ 25.989323] ? find_held_lock+0x35/0x1d0 [ 25.993359] ? __fget+0x333/0x570 [ 25.996784] ? lock_downgrade+0x980/0x980 [ 26.000907] ? find_held_lock+0x35/0x1d0 [ 26.004963] do_signal+0x90/0x1eb0 [ 26.008482] ? __lock_is_held+0xb6/0x140 [ 26.012518] ? setup_sigcontext+0x7d0/0x7d0 [ 26.016813] ? __fget+0x35c/0x570 [ 26.020241] ? iterate_fd+0x3f0/0x3f0 [ 26.024021] ? up_read+0x1a/0x40 [ 26.027364] ? __do_page_fault+0x3d6/0xc90 [ 26.031574] ? task_work_run+0x1f4/0x270 [ 26.035618] ? exit_to_usermode_loop+0x8c/0x310 [ 26.040276] exit_to_usermode_loop+0x214/0x310 [ 26.044830] ? ioctl_preallocate+0x2b0/0x2b0 [ 26.049219] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.054730] ? selinux_capable+0x40/0x40 [ 26.058771] syscall_return_slowpath+0x490/0x550 [ 26.063501] ? prepare_exit_to_usermode+0x340/0x340 [ 26.068495] ? entry_SYSCALL_64_fastpath+0x6d/0x9a [ 26.073400] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.078389] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.083129] entry_SYSCALL_64_fastpath+0x98/0x9a [ 26.087863] RIP: 0033:0x4489d9 [ 26.091026] RSP: 002b:00007fd728f7fda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 26.098712] RAX: fffffffffffffffc RBX: 00000000006ddc24 RCX: 00000000004489d9 [ 26.105981] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 26.113223] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 26.120464] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc20 [ 26.127715] R13: 6d766b2f7665642f R14: 00007fd728f809c0 R15: 0000000000000001 [ 26.134969] 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 [ 26.154057] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bc747068 [ 26.160269] ---[ end trace b7a4dca7d002b8e7 ]--- [ 26.164998] Kernel panic - not syncing: Fatal exception [ 26.170777] Dumping ftrace buffer: [ 26.174295] (ftrace buffer empty) [ 26.177974] Kernel Offset: disabled [ 26.181571] Rebooting in 86400 seconds..