[....] Starting enhanced syslogd: rsyslogd[ 16.280158] audit: type=1400 audit(1517224481.916:5): avc: denied { syslog } for pid=3879 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: [ 22.804148] audit: type=1400 audit(1517224488.440:6): avc: denied { map } for pid=4018 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 '10.128.15.194' (ECDSA) to the list of known hosts. executing program [ 29.141735] audit: type=1400 audit(1517224494.778:7): avc: denied { map } for pid=4032 comm="syzkaller529275" path="/root/syzkaller529275714" 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 [ 29.176322] *** Guest State *** [ 29.179673] CR0: actual=0x0000000080000039, shadow=0x0000000080000019, gh_mask=fffffffffffffff7 [ 29.188580] CR4: actual=0x00000000000021e0, shadow=0x00000000000001a0, gh_mask=ffffffffffffe871 [ 29.197450] CR3 = 0x0000000000000000 [ 29.201194] RSP = 0x0000000000000000 RIP = 0x000000000000fff0 [ 29.207192] RFLAGS=0x00000002 DR7 = 0x0000000000000400 [ 29.213190] Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 [ 29.219874] CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.227871] DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.235855] SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.243868] ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.251854] FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.259846] GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.267824] GDTR: limit=0x00000000, base=0x0000000000000000 [ 29.275821] LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.283807] IDTR: limit=0x00000000, base=0x0000000000000000 [ 29.291796] TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 [ 29.299776] EFER = 0xfffffffffffffffc PAT = 0x0007040600070406 [ 29.306213] DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 [ 29.313677] Interruptibility = 00000000 ActivityState = 00000000 [ 29.319926] *** Host State *** [ 29.323131] RIP = 0xffffffff811be024 RSP = 0xffff8801cf9e7508 [ 29.329130] CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 [ 29.335562] FSBase=0000000002589880 GSBase=ffff8801db500000 TRBase=fffffe0000034000 [ 29.343394] GDTBase=fffffe0000032000 IDTBase=fffffe0000000000 [ 29.349307] CR0=0000000080050033 CR3=00000001cced4003 CR4=00000000001626e0 [ 29.356556] Sysenter RSP=fffffe0000033200 CS:RIP=0010:ffffffff85a01bb0 [ 29.363281] EFER = 0x0000000000000d01 PAT = 0x0000000000000000 [ 29.369349] *** Control State *** [ 29.372898] PinBased=0000003f CPUBased=b6986dfa SecondaryExec=000000c2 [ 29.379585] EntryControls=0000d3ff ExitControls=0023efff [ 29.385053] ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 [ 29.391999] VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 [ 29.398713] VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 [ 29.405312] reason=80000021 qualification=0000000000000000 [ 29.411651] IDTVectoring: info=00000000 errcode=00000000 [ 29.417115] TSC Offset = 0xffffffed7bbe2404 [ 29.421443] EPT pointer = 0x00000001cb88701e [ 29.431197] kasan: CONFIG_KASAN_INLINE enabled [ 29.435803] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.443148] general protection fault: 0000 [#1] SMP KASAN [ 29.448656] Dumping ftrace buffer: [ 29.452164] (ftrace buffer empty) [ 29.455842] Modules linked in: [ 29.459010] CPU: 1 PID: 4032 Comm: syzkaller529275 Not tainted 4.15.0+ #285 [ 29.466085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.475421] RIP: 0010:native_write_cr4+0x4/0x10 [ 29.480064] RSP: 0018:ffff8801cf9e75a0 EFLAGS: 00010093 [ 29.485412] RAX: ffff8801bbfaa380 RBX: 00000000001606e0 RCX: ffffffff811a3202 [ 29.492654] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 29.499894] RBP: ffff8801cf9e75a0 R08: 1ffff10039f3ce0f R09: 0000000000000004 [ 29.507146] R10: ffff8801cf9e7510 R11: 0000000000000004 R12: 0000000000000093 [ 29.514392] R13: ffff8801bbfaa380 R14: ffff8801db51d130 R15: ffff8801db51d130 [ 29.521633] FS: 0000000002589880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 29.529833] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.535779] CR2: 0000000000000000 CR3: 0000000006a22005 CR4: 00000000001626e0 [ 29.543028] Call Trace: [ 29.545601] hardware_disable+0x34a/0x4b0 [ 29.549906] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 29.554377] kvm_arch_hardware_disable+0x35/0xd0 [ 29.559115] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 29.563590] hardware_disable_nolock+0x30/0x40 [ 29.568147] on_each_cpu+0xca/0x1b0 [ 29.571749] hardware_disable_all_nolock+0x3e/0x50 [ 29.576651] kvm_put_kvm+0x956/0xdf0 [ 29.580341] ? kvm_clear_guest+0xb0/0xb0 [ 29.584375] ? kvm_irqfd_release+0xd1/0x120 [ 29.588674] ? lock_downgrade+0x980/0x980 [ 29.592803] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.597283] ? kvm_irqfd_release+0xdd/0x120 [ 29.601583] ? kvm_irqfd_release+0xdd/0x120 [ 29.605886] ? kvm_put_kvm+0xdf0/0xdf0 [ 29.609749] kvm_vm_release+0x42/0x50 [ 29.613525] __fput+0x327/0x7e0 [ 29.616780] ? fput+0x140/0x140 [ 29.620044] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.625997] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.630493] ____fput+0x15/0x20 [ 29.633749] task_work_run+0x199/0x270 [ 29.637610] ? task_work_cancel+0x210/0x210 [ 29.641907] ? _raw_spin_unlock+0x22/0x30 [ 29.646038] ? switch_task_namespaces+0x87/0xc0 [ 29.650696] do_exit+0x9bb/0x1ad0 [ 29.654133] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 29.660000] ? mm_update_next_owner+0x930/0x930 [ 29.664650] ? avc_has_extended_perms+0x7fa/0x12c0 [ 29.669568] ? unwind_get_return_address+0x61/0xa0 [ 29.674478] ? avc_ss_reset+0x110/0x110 [ 29.678447] ? putname+0xee/0x130 [ 29.681884] ? save_stack+0xa3/0xd0 [ 29.685499] ? save_stack+0x43/0xd0 [ 29.689105] ? kasan_slab_free+0x71/0xc0 [ 29.693139] ? putname+0xee/0x130 [ 29.696586] ? do_sys_open+0x31b/0x6d0 [ 29.700519] ? SyS_openat+0x30/0x40 [ 29.704135] ? debug_check_no_obj_freed+0x3da/0xf1f [ 29.709137] ? __lock_is_held+0xb6/0x140 [ 29.713188] ? user_return_notifier_unregister+0x23d/0x360 [ 29.718794] ? uprobe_post_sstep_notifier+0x120/0x120 [ 29.723993] ? kvm_on_user_return+0xe1/0x3c0 [ 29.728381] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.733369] ? trace_hardirqs_on+0xd/0x10 [ 29.737495] ? kvm_on_user_return+0x286/0x3c0 [ 29.741968] ? __end_entry_SYSENTER_compat+0xd/0xd [ 29.746876] ? trace_hardirqs_off+0xd/0x10 [ 29.751087] ? exit_to_usermode_loop+0x198/0x310 [ 29.755817] ? ioctl_preallocate+0x2b0/0x2b0 [ 29.760201] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 29.765712] ? selinux_capable+0x40/0x40 [ 29.769746] ? putname+0xf3/0x130 [ 29.773175] do_group_exit+0x149/0x400 [ 29.777042] ? prepare_exit_to_usermode+0x340/0x340 [ 29.782038] ? SyS_exit+0x30/0x30 [ 29.785479] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.790501] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.795245] SyS_exit_group+0x1d/0x20 [ 29.799044] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.803779] RIP: 0033:0x43edb8 [ 29.806948] RSP: 002b:00007fff1db2d108 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.814640] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043edb8 [ 29.821890] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 29.829153] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 29.836406] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 29.843673] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 29.850932] 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 [ 29.870032] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801cf9e75a0 [ 29.876166] ---[ end trace f33cc477775e5c2c ]--- [ 29.880914] Kernel panic - not syncing: Fatal exception [ 29.886740] Dumping ftrace buffer: [ 29.890271] (ftrace buffer empty) [ 29.893964] Kernel Offset: disabled [ 29.897570] Rebooting in 86400 seconds..