[....] Starting enhanced syslogd: rsyslogd[ 11.037337] audit: type=1400 audit(1514606401.163:5): avc: denied { syslog } for pid=3001 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.442854] audit: type=1400 audit(1514606406.568:6): avc: denied { map } for pid=3140 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program [ 36.128057] audit: type=1400 audit(1514606426.253:7): avc: denied { map } for pid=3158 comm="syzkaller121596" path="/root/syzkaller121596452" 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 [ 36.160809] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 36.170977] *** Guest State *** [ 36.174326] CR0: actual=0x0000000080000031, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 [ 36.183175] CR4: actual=0x0000000000002051, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 [ 36.192029] CR3 = 0x00000000fffbc000 [ 36.195755] RSP = 0x0000000000000000 RIP = 0x0000000000000000 [ 36.201717] RFLAGS=0x00023302 DR7 = 0x0000000000000400 [ 36.207689] Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 [ 36.214339] CS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 [ 36.222307] DS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 [ 36.230266] SS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 [ 36.238231] ES: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 [ 36.246199] FS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 [ 36.254168] GS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 [ 36.262120] GDTR: limit=0x0000ffff, base=0x0000000000000000 [ 36.270100] LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000 [ 36.278055] IDTR: limit=0x0000ffff, base=0x0000000000000000 [ 36.286025] TR: sel=0x0000, attr=0x0008b, limit=0x00002088, base=0x0000000000000000 [ 36.294021] EFER = 0x0000000000000000 PAT = 0x0007040600070406 [ 36.300433] DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 [ 36.307871] Interruptibility = 00000001 ActivityState = 00000000 [ 36.314111] *** Host State *** [ 36.317298] RIP = 0xffffffff811d0cb8 RSP = 0xffff8801c7e9f508 [ 36.323277] CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 [ 36.329678] FSBase=0000000000e8f880 GSBase=ffff8801db300000 TRBase=fffffffffe7f1000 [ 36.337480] GDTBase=fffffffffe7ef000 IDTBase=ffffffffff3fe000 [ 36.343361] CR0=0000000080050033 CR3=00000001c7ecc001 CR4=00000000001626e0 [ 36.350380] Sysenter RSP=fffffffffe7f0200 CS:RIP=0010:ffffffff85401b00 [ 36.357041] EFER = 0x0000000000000d01 PAT = 0x0000000000000000 [ 36.363115] *** Control State *** [ 36.366563] PinBased=0000003f CPUBased=b5a1edfa SecondaryExec=00000043 [ 36.373212] EntryControls=0000d1ff ExitControls=0023efff [ 36.378662] ExceptionBitmap=ffffbfff PFECmask=00000000 PFECmatch=00000000 [ 36.385575] VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 [ 36.392239] VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 [ 36.398807] reason=80000021 qualification=0000000000000000 [ 36.405147] IDTVectoring: info=00000000 errcode=00000000 [ 36.410602] TSC Offset = 0xffffffea8b5e8312 [ 36.414927] TPR Threshold = 0x00 [ 36.418305] EPT pointer = 0x00000001c6c7601e [ 36.427512] kasan: CONFIG_KASAN_INLINE enabled [ 36.432101] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.439434] general protection fault: 0000 [#1] SMP KASAN [ 36.444937] Dumping ftrace buffer: [ 36.448447] (ftrace buffer empty) [ 36.452130] Modules linked in: [ 36.455292] CPU: 1 PID: 3158 Comm: syzkaller121596 Not tainted 4.15.0-rc4-mm1+ #49 [ 36.462960] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.472287] RIP: 0010:native_write_cr4+0x4/0x10 [ 36.476917] RSP: 0018:ffff8801c7e9f5a0 EFLAGS: 00010093 [ 36.482245] RAX: ffff8801ca02a700 RBX: 00000000001606e0 RCX: ffffffff811a4922 [ 36.489479] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 36.496714] RBP: ffff8801c7e9f5a0 R08: 1ffff10038fd3e0f R09: 0000000000000004 [ 36.503953] R10: ffff8801c7e9f510 R11: 0000000000000004 R12: 0000000000000093 [ 36.511187] R13: ffff8801ca02a700 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 36.518422] FS: 0000000000e8f880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 36.526617] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.532463] CR2: 0000000020e12ffc CR3: 0000000006422005 CR4: 00000000001626e0 [ 36.539698] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.546931] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.554171] Call Trace: [ 36.556723] hardware_disable+0x34a/0x4b0 [ 36.560838] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.565298] kvm_arch_hardware_disable+0x35/0xd0 [ 36.570016] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.574475] hardware_disable_nolock+0x30/0x40 [ 36.579022] on_each_cpu+0xca/0x1b0 [ 36.582613] hardware_disable_all_nolock+0x3e/0x50 [ 36.587505] kvm_put_kvm+0x956/0xde0 [ 36.591185] ? kvm_clear_guest+0xb0/0xb0 [ 36.595212] ? kvm_irqfd_release+0xd1/0x120 [ 36.599499] ? lock_downgrade+0x980/0x980 [ 36.603619] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.608081] ? kvm_irqfd_release+0xdd/0x120 [ 36.612370] ? kvm_irqfd_release+0xdd/0x120 [ 36.616657] ? kvm_put_kvm+0xde0/0xde0 [ 36.620506] kvm_vm_release+0x42/0x50 [ 36.624270] __fput+0x327/0x7e0 [ 36.627516] ? fput+0x140/0x140 [ 36.630760] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.636605] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.641067] ____fput+0x15/0x20 [ 36.644312] task_work_run+0x199/0x270 [ 36.648172] ? task_work_cancel+0x210/0x210 [ 36.652463] ? _raw_spin_unlock+0x22/0x30 [ 36.656581] ? switch_task_namespaces+0x87/0xc0 [ 36.661217] do_exit+0x9bb/0x1ad0 [ 36.664639] ? mm_update_next_owner+0x930/0x930 [ 36.669281] ? is_bpf_text_address+0xa4/0x120 [ 36.673739] ? kernel_text_address+0x102/0x140 [ 36.678286] ? __kernel_text_address+0xd/0x40 [ 36.682748] ? unwind_get_return_address+0x61/0xa0 [ 36.687642] ? __save_stack_trace+0x7e/0xd0 [ 36.691942] ? SyS_memfd_create+0x381/0x4c0 [ 36.696228] ? save_stack+0xa3/0xd0 [ 36.699819] ? save_stack+0x43/0xd0 [ 36.703409] ? kasan_slab_free+0x71/0xc0 [ 36.707434] ? kfree+0xd6/0x260 [ 36.710685] ? entry_SYSCALL_64_fastpath+0x1f/0x96 [ 36.715578] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 36.720656] ? free_obj_work+0x690/0x690 [ 36.724687] ? get_unused_fd_flags+0x190/0x190 [ 36.729243] ? alloc_file+0x27e/0x390 [ 36.733008] ? _raw_spin_unlock+0x22/0x30 [ 36.737121] ? __shmem_file_setup+0x20f/0x6a0 [ 36.741582] ? __check_object_size+0x25d/0x4f0 [ 36.746135] ? trace_hardirqs_off+0xd/0x10 [ 36.750335] ? quarantine_put+0xeb/0x190 [ 36.754362] ? kfree+0xf0/0x260 [ 36.757609] ? SyS_memfd_create+0x381/0x4c0 [ 36.761895] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.766880] do_group_exit+0x149/0x400 [ 36.770733] ? SyS_exit+0x30/0x30 [ 36.774150] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.779133] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.783852] SyS_exit_group+0x1d/0x20 [ 36.787618] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 36.792337] RIP: 0033:0x43ed78 [ 36.795489] RSP: 002b:00007ffd0037ba78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 36.803170] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043ed78 [ 36.810404] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 36.817637] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 36.824871] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 36.832103] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 36.839350] 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 [ 36.858419] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c7e9f5a0 [ 36.864545] ---[ end trace b9bff60da7a086ac ]--- [ 36.869263] Kernel panic - not syncing: Fatal exception [ 36.875012] Dumping ftrace buffer: [ 36.878513] (ftrace buffer empty) [ 36.882190] Kernel Offset: disabled [ 36.885781] Rebooting in 86400 seconds..