[....] Starting enhanced syslogd: rsyslogd[ 12.852673] audit: type=1400 audit(1514853448.688:5): avc: denied { syslog } for pid=3343 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 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: [ 19.431923] audit: type=1400 audit(1514853455.267:6): avc: denied { map } for pid=3484 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 '10.128.0.28' (ECDSA) to the list of known hosts. executing program executing program executing program [ 25.678574] audit: type=1400 audit(1514853461.514:7): avc: denied { map } for pid=3499 comm="syzkaller986025" path="/root/syzkaller986025943" 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 [ 25.711646] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.779222] kasan: CONFIG_KASAN_INLINE enabled [ 25.783874] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.791215] general protection fault: 0000 [#1] SMP KASAN [ 25.796729] Dumping ftrace buffer: [ 25.800247] (ftrace buffer empty) [ 25.803925] Modules linked in: [ 25.807089] CPU: 1 PID: 3508 Comm: syzkaller986025 Not tainted 4.15.0-rc6+ #155 [ 25.814501] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.823833] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.828467] RSP: 0018:ffff8801bf8f6fa8 EFLAGS: 00010093 [ 25.833807] RAX: ffff8801bfa0c640 RBX: 00000000001606e0 RCX: ffffffff811a3242 [ 25.841045] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 25.848284] RBP: ffff8801bf8f6fa8 R08: 1ffff10037f1ed51 R09: 0000000000000004 [ 25.855523] R10: ffff8801bf8f6f18 R11: 0000000000000004 R12: 0000000000000093 [ 25.878669] R13: ffff8801bfa0c640 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 25.885911] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.894105] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.899950] CR2: 0000000000000000 CR3: 0000000006822004 CR4: 00000000001626e0 [ 25.907191] Call Trace: [ 25.909759] hardware_disable+0x34a/0x4b0 [ 25.913878] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.918352] kvm_arch_hardware_disable+0x35/0xd0 [ 25.923075] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.927536] hardware_disable_nolock+0x30/0x40 [ 25.932088] on_each_cpu+0xca/0x1b0 [ 25.935683] hardware_disable_all_nolock+0x3e/0x50 [ 25.940583] kvm_put_kvm+0x956/0xdf0 [ 25.944268] ? kvm_clear_guest+0xb0/0xb0 [ 25.948301] ? kvm_irqfd_release+0xd1/0x120 [ 25.952594] ? lock_downgrade+0x980/0x980 [ 25.956719] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.961185] ? kvm_irqfd_release+0xdd/0x120 [ 25.965473] ? kvm_irqfd_release+0xdd/0x120 [ 25.969761] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.973615] kvm_vm_release+0x42/0x50 [ 25.977384] __fput+0x327/0x7e0 [ 25.980632] ? fput+0x140/0x140 [ 25.983879] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.989732] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.994200] ____fput+0x15/0x20 [ 25.997452] task_work_run+0x199/0x270 [ 26.001310] ? task_work_cancel+0x210/0x210 [ 26.005602] ? _raw_spin_unlock+0x22/0x30 [ 26.009731] ? switch_task_namespaces+0x87/0xc0 [ 26.014371] do_exit+0x9bb/0x1ad0 [ 26.017791] ? find_held_lock+0x35/0x1d0 [ 26.021839] ? mm_update_next_owner+0x930/0x930 [ 26.026486] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 26.031644] ? lock_downgrade+0x980/0x980 [ 26.035761] ? __unqueue_futex+0x1c0/0x290 [ 26.039964] ? lock_release+0xa40/0xa40 [ 26.043916] ? fault_in_user_writeable+0x90/0x90 [ 26.048652] ? do_raw_spin_trylock+0x190/0x190 [ 26.053200] ? futex_wake+0x680/0x680 [ 26.056977] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 26.062060] ? futex_wait+0x6a9/0x9a0 [ 26.065834] ? check_noncircular+0x20/0x20 [ 26.070040] ? wake_up_q+0x8a/0xe0 [ 26.073547] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 26.078616] ? futex_wake+0x2ca/0x680 [ 26.082389] ? find_held_lock+0x35/0x1d0 [ 26.086422] ? get_signal+0x7ae/0x16c0 [ 26.090278] ? lock_downgrade+0x980/0x980 [ 26.094408] do_group_exit+0x149/0x400 [ 26.098268] ? do_raw_spin_trylock+0x190/0x190 [ 26.102819] ? SyS_exit+0x30/0x30 [ 26.106254] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.110729] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.115725] get_signal+0x73f/0x16c0 [ 26.119414] ? ptrace_notify+0x130/0x130 [ 26.123447] ? lock_release+0xa40/0xa40 [ 26.127389] ? __lock_is_held+0xb6/0x140 [ 26.131423] ? __fget+0x35c/0x570 [ 26.134846] do_signal+0x90/0x1eb0 [ 26.138354] ? iterate_fd+0x3f0/0x3f0 [ 26.142123] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.147985] ? rcu_note_context_switch+0x710/0x710 [ 26.152883] ? setup_sigcontext+0x7d0/0x7d0 [ 26.157169] ? __might_sleep+0x95/0x190 [ 26.161116] ? _cond_resched+0x14/0x30 [ 26.164998] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.169895] ? selinux_file_ioctl+0x444/0x690 [ 26.174357] ? __fget_light+0x297/0x380 [ 26.178303] ? kvm_vcpu_compat_ioctl+0x1d6/0x450 [ 26.183029] ? exit_to_usermode_loop+0x8c/0x310 [ 26.187670] exit_to_usermode_loop+0x214/0x310 [ 26.192220] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.197727] ? compat_SyS_ioctl+0x77/0x2a30 [ 26.202020] ? lock_downgrade+0x980/0x980 [ 26.206138] ? do_fast_syscall_32+0x156/0xf9d [ 26.210605] do_fast_syscall_32+0xbfd/0xf9d [ 26.214897] ? do_raw_spin_trylock+0x190/0x190 [ 26.219448] ? do_int80_syscall_32+0x9d0/0x9d0 [ 26.224002] ? syscall_return_slowpath+0x2ad/0x550 [ 26.228899] ? prepare_exit_to_usermode+0x340/0x340 [ 26.233887] ? sysret32_from_system_call+0x5/0x3b [ 26.238700] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.243513] entry_SYSENTER_compat+0x54/0x63 [ 26.247890] RIP: 0023:0xf7ff7c79 [ 26.251221] RSP: 002b:00000000f7fcd1ec EFLAGS: 00000296 ORIG_RAX: 00000000000000f0 [ 26.258896] RAX: fffffffffffffe00 RBX: 00000000080faff4 RCX: 0000000000000000 [ 26.266137] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000080faff4 [ 26.273386] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 26.280624] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.287964] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.295210] 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 [ 26.314289] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bf8f6fa8 [ 26.320407] ---[ end trace f6af085e5fbce6e3 ]--- [ 26.325141] Kernel panic - not syncing: Fatal exception [ 26.330507] Dumping ftrace buffer: [ 26.334018] (ftrace buffer empty) [ 26.337700] Kernel Offset: disabled [ 26.341322] Rebooting in 86400 seconds..