[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 13.884867] sshd (3025) used greatest stack depth: 14504 bytes left [....] 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: [ 20.088995] audit: type=1400 audit(1513647327.732:6): avc: denied { map } for pid=3137 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 'ci-upstream-mmots-kasan-gce-3,10.128.0.36' (ECDSA) to the list of known hosts. executing program [ 38.146770] audit: type=1400 audit(1513647345.790:7): avc: denied { map } for pid=3154 comm="syzkaller422333" path="/root/syzkaller422333687" 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 [ 38.181567] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 38.253977] kasan: CONFIG_KASAN_INLINE enabled [ 38.258589] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.265928] general protection fault: 0000 [#1] SMP KASAN [ 38.271436] Dumping ftrace buffer: [ 38.274941] (ftrace buffer empty) [ 38.278624] Modules linked in: [ 38.281782] CPU: 1 PID: 3155 Comm: syzkaller422333 Not tainted 4.15.0-rc2-mm1+ #39 [ 38.289451] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.298775] RIP: 0010:native_write_cr4+0x4/0x10 [ 38.303405] RSP: 0018:ffff8801c485f5a0 EFLAGS: 00010093 [ 38.308733] RAX: ffff8801c48c8500 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 38.315970] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 38.323204] RBP: ffff8801c485f5a0 R08: ffff8801c485f150 R09: ffff8801c48c8500 [ 38.330445] R10: ffff8801c485f510 R11: ffffed003890be2c R12: 0000000000000093 [ 38.337677] R13: ffff8801c48c8500 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 38.344912] FS: 0000000001b0f880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 38.353105] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.358948] CR2: 00007ff9d942b000 CR3: 0000000006225005 CR4: 00000000001626e0 [ 38.366184] Call Trace: [ 38.368739] hardware_disable+0x34a/0x4b0 [ 38.372855] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 38.377320] kvm_arch_hardware_disable+0x35/0xd0 [ 38.382040] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 38.386500] hardware_disable_nolock+0x30/0x40 [ 38.391048] on_each_cpu+0xca/0x1b0 [ 38.394644] hardware_disable_all_nolock+0x3e/0x50 [ 38.399538] kvm_put_kvm+0x956/0xde0 [ 38.403222] ? kvm_clear_guest+0xb0/0xb0 [ 38.407249] ? lock_downgrade+0x980/0x980 [ 38.411370] ? do_raw_spin_trylock+0x190/0x190 [ 38.415920] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.420380] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.425378] ? kvm_irqfd_release+0xdd/0x120 [ 38.429664] ? kvm_irqfd_release+0xdd/0x120 [ 38.433961] ? kvm_put_kvm+0xde0/0xde0 [ 38.437814] kvm_vm_release+0x42/0x50 [ 38.441577] __fput+0x333/0x7f0 [ 38.444823] ? fput+0x140/0x140 [ 38.448068] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 38.453914] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.458376] ____fput+0x15/0x20 [ 38.461621] task_work_run+0x199/0x270 [ 38.465472] ? task_work_cancel+0x210/0x210 [ 38.469987] ? _raw_spin_unlock+0x22/0x30 [ 38.474105] ? switch_task_namespaces+0x87/0xc0 [ 38.478743] do_exit+0x9bb/0x1ae0 [ 38.482173] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 38.486807] ? mm_update_next_owner+0x930/0x930 [ 38.491441] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 38.496338] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 38.502186] ? _do_fork+0x2ae/0xf10 [ 38.505780] ? rcu_note_context_switch+0x710/0x710 [ 38.510671] ? fork_idle+0x2d0/0x2d0 [ 38.514348] ? __might_sleep+0x95/0x190 [ 38.518291] ? do_nanosleep+0x4fc/0x6e0 [ 38.522234] ? schedule_timeout_idle+0x90/0x90 [ 38.526791] ? memset+0x31/0x40 [ 38.530038] ? hrtimer_nanosleep+0x2cc/0x860 [ 38.534414] ? nanosleep_copyout+0x100/0x100 [ 38.538786] ? __might_sleep+0x95/0x190 [ 38.542728] ? kasan_check_write+0x14/0x20 [ 38.546927] ? _copy_from_user+0x99/0x110 [ 38.551042] ? __hrtimer_init+0x140/0x140 [ 38.555155] ? syscall_return_slowpath+0x550/0x550 [ 38.560050] do_group_exit+0x149/0x400 [ 38.563904] ? SyS_exit+0x30/0x30 [ 38.567323] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.572301] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 38.577022] SyS_exit_group+0x1d/0x20 [ 38.580787] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 38.585506] RIP: 0033:0x448fe9 [ 38.588661] RSP: 002b:00007ffc83b54888 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 38.596334] RAX: ffffffffffffffda RBX: 00007efe38c0c700 RCX: 0000000000448fe9 [ 38.603568] RDX: 0000000000474181 RSI: 0000000000000000 RDI: 0000000000000000 [ 38.610800] RBP: 00007ffc83b54830 R08: 00000000006dd1c0 R09: 0000000000000000 [ 38.618034] R10: 00000000006dd144 R11: 0000000000000206 R12: 0000000000000000 [ 38.625270] R13: 00007ffc83b5482f R14: 00007efe38c0c9c0 R15: 0000000000000000 [ 38.632512] 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 [ 38.651572] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c485f5a0 [ 38.657684] ---[ end trace a8e23087a669d187 ]--- [ 38.662401] Kernel panic - not syncing: Fatal exception [ 38.668084] Dumping ftrace buffer: [ 38.671590] (ftrace buffer empty) [ 38.675265] Kernel Offset: disabled [ 38.678869] Rebooting in 86400 seconds..