[....] Starting enhanced syslogd: rsyslogd[ 12.016098] audit: type=1400 audit(1515021122.019:5): 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 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: [ 17.627061] audit: type=1400 audit(1515021127.630:6): 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 '10.128.15.200' (ECDSA) to the list of known hosts. executing program executing program [ 44.439800] audit: type=1400 audit(1515021154.443:7): avc: denied { map } for pid=3503 comm="syzkaller362570" path="/root/syzkaller362570089" 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 [ 44.479786] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 45.179238] kasan: CONFIG_KASAN_INLINE enabled [ 45.183858] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.191202] general protection fault: 0000 [#1] SMP KASAN [ 45.196714] Dumping ftrace buffer: [ 45.200219] (ftrace buffer empty) [ 45.203893] Modules linked in: [ 45.207055] CPU: 0 PID: 3562 Comm: syzkaller362570 Not tainted 4.15.0-rc6+ #246 [ 45.214464] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.223793] RIP: 0010:native_write_cr4+0x4/0x10 [ 45.228426] RSP: 0018:ffff8801bbe57068 EFLAGS: 00010093 [ 45.233753] RAX: ffff8801bbe46680 RBX: 00000000001606f0 RCX: ffffffff811a3242 [ 45.240990] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 45.248245] RBP: ffff8801bbe57068 R08: 1ffff100377cad69 R09: 0000000000000004 [ 45.255489] R10: ffff8801bbe56fd8 R11: 0000000000000004 R12: 0000000000000093 [ 45.262724] R13: ffff8801bbe46680 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 45.269968] FS: 00007efe54f8b700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 45.278163] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.284007] CR2: 0000000000000000 CR3: 0000000006822002 CR4: 00000000001626f0 [ 45.291242] Call Trace: [ 45.293795] hardware_disable+0x34a/0x4b0 [ 45.297912] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 45.302376] kvm_arch_hardware_disable+0x35/0xd0 [ 45.307098] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 45.311559] hardware_disable_nolock+0x30/0x40 [ 45.316118] on_each_cpu+0xca/0x1b0 [ 45.319714] hardware_disable_all_nolock+0x3e/0x50 [ 45.324610] kvm_put_kvm+0x956/0xdf0 [ 45.328294] ? kvm_clear_guest+0xb0/0xb0 [ 45.332322] ? kvm_irqfd_release+0xd1/0x120 [ 45.336611] ? lock_downgrade+0x980/0x980 [ 45.340735] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.345200] ? kvm_irqfd_release+0xdd/0x120 [ 45.349486] ? kvm_irqfd_release+0xdd/0x120 [ 45.353773] ? kvm_put_kvm+0xdf0/0xdf0 [ 45.357624] kvm_vm_release+0x42/0x50 [ 45.361391] __fput+0x327/0x7e0 [ 45.364640] ? fput+0x140/0x140 [ 45.367885] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 45.373731] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.378194] ____fput+0x15/0x20 [ 45.381441] task_work_run+0x199/0x270 [ 45.385297] ? task_work_cancel+0x210/0x210 [ 45.389583] ? _raw_spin_unlock+0x22/0x30 [ 45.393695] ? switch_task_namespaces+0x87/0xc0 [ 45.398334] do_exit+0x9bb/0x1ad0 [ 45.401762] ? mm_update_next_owner+0x930/0x930 [ 45.406406] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 45.411570] ? __might_sleep+0x95/0x190 [ 45.415515] ? find_held_lock+0x35/0x1d0 [ 45.419544] ? __pv_queued_spin_lock_slowpath+0x1480/0x1480 [ 45.425232] ? futex_wait+0x402/0x9a0 [ 45.429001] ? lock_downgrade+0x980/0x980 [ 45.433116] ? perf_trace_lock+0xd6/0x900 [ 45.437226] ? __unqueue_futex+0x1c0/0x290 [ 45.441427] ? lock_release+0xa40/0xa40 [ 45.445367] ? trace_event_raw_event_lock+0x340/0x340 [ 45.450522] ? do_raw_spin_trylock+0x190/0x190 [ 45.455074] ? futex_wake+0x680/0x680 [ 45.458843] ? check_noncircular+0x20/0x20 [ 45.463045] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 45.468113] ? futex_wait+0x6a9/0x9a0 [ 45.471887] ? find_held_lock+0x35/0x1d0 [ 45.475918] ? get_signal+0x7ae/0x16c0 [ 45.479773] ? lock_downgrade+0x980/0x980 [ 45.483891] do_group_exit+0x149/0x400 [ 45.487743] ? do_raw_spin_trylock+0x190/0x190 [ 45.492295] ? SyS_exit+0x30/0x30 [ 45.495713] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.500174] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.505156] get_signal+0x73f/0x16c0 [ 45.508842] ? ptrace_notify+0x130/0x130 [ 45.512871] ? exit_robust_list+0x240/0x240 [ 45.517165] ? find_held_lock+0x35/0x1d0 [ 45.521195] ? __fget+0x333/0x570 [ 45.524613] ? lock_downgrade+0x980/0x980 [ 45.528727] do_signal+0x90/0x1eb0 [ 45.532234] ? __lock_is_held+0xb6/0x140 [ 45.536264] ? setup_sigcontext+0x7d0/0x7d0 [ 45.540553] ? __fget+0x35c/0x570 [ 45.543978] ? iterate_fd+0x3f0/0x3f0 [ 45.547748] ? finish_task_switch+0x1d3/0x740 [ 45.552212] ? exit_to_usermode_loop+0x8c/0x310 [ 45.556853] exit_to_usermode_loop+0x214/0x310 [ 45.561400] ? ioctl_preallocate+0x2b0/0x2b0 [ 45.565784] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 45.571287] ? selinux_capable+0x40/0x40 [ 45.575319] syscall_return_slowpath+0x490/0x550 [ 45.580051] ? prepare_exit_to_usermode+0x340/0x340 [ 45.585122] ? entry_SYSCALL_64_fastpath+0x6d/0x9a [ 45.590017] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.594999] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.599732] entry_SYSCALL_64_fastpath+0x98/0x9a [ 45.604453] RIP: 0033:0x445dc9 [ 45.607610] RSP: 002b:00007efe54f8ada8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 45.615286] RAX: fffffffffffffe00 RBX: 00000000006dbc54 RCX: 0000000000445dc9 [ 45.622521] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc54 [ 45.629757] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 45.636993] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc50 [ 45.644229] R13: 6d766b2f7665642f R14: 6b66722f7665642f R15: 0000000000000009 [ 45.651477] 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 [ 45.670570] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bbe57068 [ 45.676687] ---[ end trace 5d8f43e3c1d01fae ]--- [ 45.681406] Kernel panic - not syncing: Fatal exception [ 45.686762] Dumping ftrace buffer: [ 45.690266] (ftrace buffer empty) [ 45.693943] Kernel Offset: disabled [ 45.697537] Rebooting in 86400 seconds..