[ 13.317638] rsyslogd (2983) used greatest stack depth: 14504 bytes left [?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: [ 18.385746] audit: type=1400 audit(1513805934.069:6): avc: denied { map } for pid=3135 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-9,10.128.0.46' (ECDSA) to the list of known hosts. [ 60.465920] audit: type=1400 audit(1513805976.149:7): avc: denied { map } for pid=3152 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2017/12/20 21:39:36 parsed 1 programs 2017/12/20 21:39:36 executed programs: 0 [ 60.576904] audit: type=1400 audit(1513805976.260:8): avc: denied { map } for pid=3152 comm="syz-execprog" path="/root/syzkaller-shm004615373" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 60.609197] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 60.658247] kasan: CONFIG_KASAN_INLINE enabled [ 60.662848] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 60.670179] general protection fault: 0000 [#1] SMP KASAN [ 60.675694] Dumping ftrace buffer: [ 60.679195] (ftrace buffer empty) [ 60.682872] Modules linked in: [ 60.686034] CPU: 1 PID: 3164 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 [ 60.693537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.702866] RIP: 0010:native_write_cr4+0x4/0x10 [ 60.707497] RSP: 0018:ffff8801c5237058 EFLAGS: 00010093 [ 60.712825] RAX: ffff8801c519a200 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 60.720061] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 60.727304] RBP: ffff8801c5237058 R08: ffff8801c5236c08 R09: ffff8801c519a200 [ 60.734538] R10: ffff8801c5236fc8 R11: ffffed0038a46d83 R12: 0000000000000093 [ 60.741774] R13: ffff8801c519a200 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 60.749011] FS: 00007f43c2cba700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 60.757199] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.763044] CR2: 0000000000000000 CR3: 0000000006225001 CR4: 00000000001626e0 [ 60.770281] Call Trace: [ 60.772838] hardware_disable+0x34a/0x4b0 [ 60.776953] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 60.781414] kvm_arch_hardware_disable+0x35/0xd0 [ 60.786133] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 60.790591] hardware_disable_nolock+0x30/0x40 [ 60.795139] on_each_cpu+0xca/0x1b0 [ 60.798731] hardware_disable_all_nolock+0x3e/0x50 [ 60.803624] kvm_put_kvm+0x956/0xde0 [ 60.807313] ? kvm_clear_guest+0xb0/0xb0 [ 60.811342] ? lock_downgrade+0x980/0x980 [ 60.815467] ? do_raw_spin_trylock+0x190/0x190 [ 60.820024] ? _raw_spin_unlock_irq+0x27/0x70 [ 60.824489] ? kvm_irqfd_release+0xdd/0x120 [ 60.828781] ? kvm_irqfd_release+0xdd/0x120 [ 60.833070] ? kvm_put_kvm+0xde0/0xde0 [ 60.836921] kvm_vm_release+0x42/0x50 [ 60.840688] __fput+0x333/0x7f0 [ 60.843936] ? fput+0x140/0x140 [ 60.847181] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 60.853027] ? _raw_spin_unlock_irq+0x27/0x70 [ 60.857488] ____fput+0x15/0x20 [ 60.860734] task_work_run+0x199/0x270 [ 60.864585] ? task_work_cancel+0x210/0x210 [ 60.868871] ? _raw_spin_unlock+0x22/0x30 [ 60.872984] ? switch_task_namespaces+0x87/0xc0 [ 60.877617] do_exit+0x9bb/0x1ae0 [ 60.881039] ? mm_update_next_owner+0x930/0x930 [ 60.885676] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 60.890844] ? lock_downgrade+0x980/0x980 [ 60.894965] ? futex_wait+0x3ad/0x990 [ 60.898734] ? __unqueue_futex+0x1c0/0x290 [ 60.902931] ? lock_release+0xda0/0xda0 [ 60.906882] ? fault_in_user_writeable+0x90/0x90 [ 60.911608] ? check_noncircular+0x20/0x20 [ 60.915811] ? do_raw_spin_trylock+0x190/0x190 [ 60.920360] ? futex_wake+0x680/0x680 [ 60.924130] ? lock_downgrade+0x980/0x980 [ 60.928248] ? mmdrop+0x18/0x30 [ 60.931494] ? drop_futex_key_refs.isra.13+0x63/0xa0 [ 60.936563] ? futex_wait+0x69e/0x990 [ 60.940347] ? find_held_lock+0x39/0x1d0 [ 60.944401] ? lock_downgrade+0x980/0x980 [ 60.948518] ? recalc_sigpending_tsk+0x150/0x150 [ 60.953238] ? get_signal+0x2b2/0x16c0 [ 60.957098] do_group_exit+0x149/0x400 [ 60.960951] ? do_raw_spin_trylock+0x190/0x190 [ 60.965499] ? SyS_exit+0x30/0x30 [ 60.968920] ? _raw_spin_unlock_irq+0x27/0x70 [ 60.973380] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.978364] get_signal+0x73f/0x16c0 [ 60.982049] ? ptrace_notify+0x130/0x130 [ 60.986075] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 60.991325] ? exit_robust_list+0x240/0x240 [ 60.995615] ? lock_downgrade+0x980/0x980 [ 60.999733] ? __fget+0xbb/0x580 [ 61.003068] do_signal+0x94/0x1ee0 [ 61.006574] ? __lock_is_held+0xbc/0x140 [ 61.010602] ? setup_sigcontext+0x7d0/0x7d0 [ 61.014891] ? __fget+0x362/0x580 [ 61.018312] ? iterate_fd+0x3f0/0x3f0 [ 61.022081] ? lock_downgrade+0x980/0x980 [ 61.026194] ? lock_acquire+0x1d5/0x580 [ 61.030133] ? exit_to_usermode_loop+0x8c/0x2f0 [ 61.034769] exit_to_usermode_loop+0x258/0x2f0 [ 61.039315] ? ioctl_preallocate+0x2b0/0x2b0 [ 61.043687] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 61.049188] ? selinux_capable+0x40/0x40 [ 61.053220] syscall_return_slowpath+0x490/0x550 [ 61.057955] ? prepare_exit_to_usermode+0x340/0x340 [ 61.062937] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 61.067832] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 61.072814] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 61.077548] entry_SYSCALL_64_fastpath+0x94/0x96 [ 61.082270] RIP: 0033:0x452a09 [ 61.085427] RSP: 002b:00007f43c2cb9ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 61.093100] RAX: fffffffffffffe00 RBX: 000000000071c038 RCX: 0000000000452a09 [ 61.100335] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000071c038 [ 61.107572] RBP: 000000000071c038 R08: 0000000000000000 R09: 000000000071c010 [ 61.114806] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 61.122129] R13: 00007ffed335b6df R14: 00007f43c2cba9c0 R15: 0000000000000006 [ 61.129374] 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 [ 61.148441] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c5237058 [ 61.154556] ---[ end trace 8ee9c3331059cdab ]--- [ 61.159283] Kernel panic - not syncing: Fatal exception [ 61.164642] Dumping ftrace buffer: [ 61.168150] (ftrace buffer empty) [ 61.171826] Kernel Offset: disabled [ 61.175417] Rebooting in 86400 seconds..