[ 10.919844] rsyslogd (2986) used greatest stack depth: 14800 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: [ 15.946234] audit: type=1400 audit(1514306193.601:6): avc: denied { map } for pid=3134 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-6,10.128.0.34' (ECDSA) to the list of known hosts. executing program [ 26.022980] audit: type=1400 audit(1514306203.678:7): avc: denied { map } for pid=3149 comm="syzkaller203386" path="/root/syzkaller203386825" 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 [ 26.034430] netlink: 'syzkaller203386': attribute type 10 has an invalid length. [ 26.059805] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program [ 26.075751] netlink: 'syzkaller203386': attribute type 10 has an invalid length. [ 26.104650] netlink: 'syzkaller203386': attribute type 10 has an invalid length. executing program [ 26.124316] netlink: 'syzkaller203386': attribute type 10 has an invalid length. [ 26.149732] netlink: 'syzkaller203386': attribute type 10 has an invalid length. executing program [ 26.169671] netlink: 'syzkaller203386': attribute type 10 has an invalid length. executing program [ 26.196694] netlink: 'syzkaller203386': attribute type 10 has an invalid length. [ 26.216848] netlink: 'syzkaller203386': attribute type 10 has an invalid length. executing program [ 26.242911] netlink: 'syzkaller203386': attribute type 10 has an invalid length. [ 26.263783] netlink: 'syzkaller203386': attribute type 10 has an invalid length. executing program executing program executing program executing program executing program [ 26.476587] kasan: CONFIG_KASAN_INLINE enabled [ 26.481205] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.488533] general protection fault: 0000 [#1] SMP KASAN [ 26.494035] Dumping ftrace buffer: [ 26.497538] (ftrace buffer empty) [ 26.501215] Modules linked in: [ 26.504375] CPU: 1 PID: 3185 Comm: syzkaller203386 Not tainted 4.15.0-rc4-mm1+ #49 [ 26.512051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.521391] RIP: 0010:native_write_cr4+0x4/0x10 [ 26.526023] RSP: 0018:ffff8801c500f058 EFLAGS: 00010093 [ 26.531351] RAX: ffff8801c4c8a200 RBX: 00000000001606e0 RCX: ffffffff811a4922 [ 26.538584] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 26.545818] RBP: ffff8801c500f058 R08: 1ffff10038a01d67 R09: 0000000000000004 [ 26.553054] R10: ffff8801c500efc8 R11: 0000000000000004 R12: 0000000000000093 [ 26.560296] R13: ffff8801c4c8a200 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 26.567533] FS: 00007f36e3b26700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 26.575725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.581579] CR2: 0000000000000000 CR3: 0000000006422001 CR4: 00000000001626e0 [ 26.588832] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.596077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.603314] Call Trace: [ 26.605914] hardware_disable+0x34a/0x4b0 [ 26.610124] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.614597] kvm_arch_hardware_disable+0x35/0xd0 [ 26.619326] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.623801] hardware_disable_nolock+0x30/0x40 [ 26.628406] on_each_cpu+0xca/0x1b0 [ 26.632007] hardware_disable_all_nolock+0x3e/0x50 [ 26.636908] kvm_put_kvm+0x956/0xde0 [ 26.640591] ? kvm_clear_guest+0xb0/0xb0 [ 26.644618] ? kvm_irqfd_release+0xd1/0x120 [ 26.648904] ? lock_downgrade+0x980/0x980 [ 26.653026] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.657495] ? kvm_irqfd_release+0xdd/0x120 [ 26.661781] ? kvm_irqfd_release+0xdd/0x120 [ 26.666087] ? kvm_put_kvm+0xde0/0xde0 [ 26.669940] kvm_vm_release+0x42/0x50 [ 26.673709] __fput+0x327/0x7e0 [ 26.676958] ? fput+0x140/0x140 [ 26.680206] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.686057] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.690519] ____fput+0x15/0x20 [ 26.693769] task_work_run+0x199/0x270 [ 26.697624] ? task_work_cancel+0x210/0x210 [ 26.701931] ? _raw_spin_unlock+0x22/0x30 [ 26.706051] ? switch_task_namespaces+0x87/0xc0 [ 26.710688] do_exit+0x9bb/0x1ad0 [ 26.714110] ? mm_update_next_owner+0x930/0x930 [ 26.718753] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 26.723909] ? __might_sleep+0x95/0x190 [ 26.727850] ? _cond_resched+0x14/0x30 [ 26.731705] ? futex_wait_queue_me+0x527/0x7e0 [ 26.736251] ? refill_pi_state_cache.part.5+0x2f0/0x2f0 [ 26.741583] ? get_futex_value_locked+0xc3/0xf0 [ 26.746215] ? futex_wait_setup+0x22e/0x3d0 [ 26.750507] ? check_noncircular+0x20/0x20 [ 26.754710] ? drop_futex_key_refs.isra.12+0x63/0xa0 [ 26.759779] ? futex_wait+0x6a9/0x9a0 [ 26.763549] ? find_held_lock+0x35/0x1d0 [ 26.767582] ? get_signal+0x7ae/0x16c0 [ 26.771433] ? lock_downgrade+0x980/0x980 [ 26.775550] do_group_exit+0x149/0x400 [ 26.779403] ? do_raw_spin_trylock+0x190/0x190 [ 26.783949] ? SyS_exit+0x30/0x30 [ 26.787366] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.791828] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.796811] get_signal+0x73f/0x16c0 [ 26.800493] ? ptrace_notify+0x130/0x130 [ 26.804523] ? exit_robust_list+0x240/0x240 [ 26.808811] ? __kernel_text_address+0xd/0x40 [ 26.813272] ? unwind_get_return_address+0x61/0xa0 [ 26.818170] ? __save_stack_trace+0x7e/0xd0 [ 26.822465] do_signal+0x94/0x1ee0 [ 26.825969] ? save_stack+0x43/0xd0 [ 26.829560] ? kasan_slab_free+0x71/0xc0 [ 26.833585] ? kmem_cache_free+0x83/0x2a0 [ 26.837698] ? putname+0xee/0x130 [ 26.841115] ? do_sys_open+0x31b/0x6d0 [ 26.844968] ? SyS_openat+0x30/0x40 [ 26.848563] ? entry_SYSCALL_64_fastpath+0x1f/0x96 [ 26.853461] ? setup_sigcontext+0x7d0/0x7d0 [ 26.857758] ? free_obj_work+0x690/0x690 [ 26.861782] ? __fd_install+0x288/0x740 [ 26.865738] ? get_unused_fd_flags+0x190/0x190 [ 26.870293] ? may_open_dev+0xe0/0xe0 [ 26.874063] ? rcu_pm_notify+0xc0/0xc0 [ 26.877916] ? exit_to_usermode_loop+0x8c/0x2f0 [ 26.882549] exit_to_usermode_loop+0x258/0x2f0 [ 26.887094] ? putname+0xee/0x130 [ 26.890512] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.896019] syscall_return_slowpath+0x490/0x550 [ 26.900739] ? prepare_exit_to_usermode+0x340/0x340 [ 26.905725] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 26.910621] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.915602] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.920327] entry_SYSCALL_64_fastpath+0x94/0x96 [ 26.925047] RIP: 0033:0x4462a9 [ 26.928202] RSP: 002b:00007f36e3b25da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 26.935874] RAX: 0000000000000000 RBX: 00000000006dbc24 RCX: 00000000004462a9 [ 26.943108] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc24 [ 26.950342] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 26.957581] R10: 0000000000000000 R11: 0000000000000246 R12: 6d766b2f7665642f [ 26.964816] R13: 78756e696c65732f R14: 0030656c69662f2e R15: 0000000000000010 [ 26.972059] 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 [ 26.991125] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c500f058 [ 26.997238] ---[ end trace b99208ff9508321d ]--- [ 27.001958] Kernel panic - not syncing: Fatal exception [ 27.007318] Dumping ftrace buffer: [ 27.010827] (ftrace buffer empty) [ 27.014506] Kernel Offset: disabled [ 27.018099] Rebooting in 86400 seconds..