[....] Starting enhanced syslogd: rsyslogd[ 12.694146] audit: type=1400 audit(1516417705.782:5): avc: denied { syslog } for pid=3511 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: [ 19.938366] audit: type=1400 audit(1516417713.026:6): avc: denied { map } for pid=3651 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 '10.128.0.46' (ECDSA) to the list of known hosts. executing program [ 26.197484] audit: type=1400 audit(1516417719.285:7): avc: denied { map } for pid=3665 comm="syzkaller880274" path="/root/syzkaller880274280" 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 [ 26.228871] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 26.248862] kasan: CONFIG_KASAN_INLINE enabled [ 26.253477] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.260811] general protection fault: 0000 [#1] SMP KASAN [ 26.266325] Dumping ftrace buffer: [ 26.269831] (ftrace buffer empty) [ 26.273511] Modules linked in: [ 26.276674] CPU: 1 PID: 3665 Comm: syzkaller880274 Not tainted 4.15.0-rc8-mm1+ #58 [ 26.284345] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.293673] RIP: 0010:native_write_cr4+0x4/0x10 [ 26.298317] RSP: 0018:ffff8801bba4f5a0 EFLAGS: 00010093 [ 26.303649] RAX: ffff8801bb594140 RBX: 00000000001606e0 RCX: ffffffff811a41d2 [ 26.310888] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 26.318128] RBP: ffff8801bba4f5a0 R08: 1ffff10037749e0f R09: 0000000000000004 [ 26.325365] R10: ffff8801bba4f510 R11: 0000000000000004 R12: 0000000000000093 [ 26.332604] R13: ffff8801bb594140 R14: ffff8801db31d130 R15: ffff8801db31d130 [ 26.339843] FS: 0000000000924880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 26.348037] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.353889] CR2: 0000000000000000 CR3: 0000000006822004 CR4: 00000000001626e0 [ 26.361130] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.368368] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.375609] Call Trace: [ 26.378165] hardware_disable+0x34a/0x4b0 [ 26.382286] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.386752] kvm_arch_hardware_disable+0x35/0xd0 [ 26.391475] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.395941] hardware_disable_nolock+0x30/0x40 [ 26.400493] on_each_cpu+0xca/0x1b0 [ 26.404091] hardware_disable_all_nolock+0x3e/0x50 [ 26.408989] kvm_put_kvm+0x956/0xde0 [ 26.412674] ? kvm_clear_guest+0xb0/0xb0 [ 26.416707] ? retint_kernel+0x10/0x10 [ 26.420569] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.425554] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.430294] ? kvm_irqfd_release+0xdd/0x120 [ 26.434584] ? kvm_irqfd_release+0xdd/0x120 [ 26.438874] ? kvm_put_kvm+0xde0/0xde0 [ 26.442731] kvm_vm_release+0x42/0x50 [ 26.446499] __fput+0x327/0x7e0 [ 26.449750] ? fput+0x140/0x140 [ 26.453003] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.458857] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.463323] ____fput+0x15/0x20 [ 26.466576] task_work_run+0x199/0x270 [ 26.470434] ? task_work_cancel+0x210/0x210 [ 26.474733] ? _raw_spin_unlock+0x22/0x30 [ 26.478849] ? switch_task_namespaces+0x87/0xc0 [ 26.483490] do_exit+0x9bb/0x1ad0 [ 26.486913] ? kvm_vcpu_fault+0x520/0x520 [ 26.491031] ? mm_update_next_owner+0x930/0x930 [ 26.495670] ? find_held_lock+0x35/0x1d0 [ 26.499707] ? handle_mm_fault+0x2a0/0x930 [ 26.503913] ? find_held_lock+0x35/0x1d0 [ 26.507948] ? __do_page_fault+0x5f7/0xc90 [ 26.512153] ? lock_downgrade+0x980/0x980 [ 26.516274] ? down_read_trylock+0xdb/0x170 [ 26.520567] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.525116] ? vmacache_find+0x5f/0x280 [ 26.529062] ? up_read+0x1a/0x40 [ 26.532397] ? __do_page_fault+0x3d6/0xc90 [ 26.536597] ? task_work_run+0x1f4/0x270 [ 26.540630] ? kvm_vcpu_fault+0x520/0x520 [ 26.544744] ? do_vfs_ioctl+0x486/0x1520 [ 26.548776] ? ioctl_preallocate+0x2b0/0x2b0 [ 26.553153] ? selinux_capable+0x40/0x40 [ 26.557186] ? __close_fd+0x222/0x360 [ 26.560959] do_group_exit+0x149/0x400 [ 26.564817] ? SyS_exit+0x30/0x30 [ 26.568239] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.573228] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.577953] SyS_exit_group+0x1d/0x20 [ 26.581725] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 26.586447] RIP: 0033:0x441cb8 [ 26.589607] RSP: 002b:00007ffecae78ac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.597283] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441cb8 [ 26.604522] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.611762] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.619001] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004040c0 [ 26.626242] R13: 0000000000404150 R14: 0000000000000000 R15: 0000000000000000 [ 26.633496] 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 [ 26.652568] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bba4f5a0 [ 26.658687] ---[ end trace 841da52df3a93ab5 ]--- [ 26.663409] Kernel panic - not syncing: Fatal exception [ 26.669091] Dumping ftrace buffer: [ 26.672602] (ftrace buffer empty) [ 26.676282] Kernel Offset: disabled [ 26.679876] Rebooting in 86400 seconds..