INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-next-kasan-gce-1,10.128.0.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.008638] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 59.020910] usercopy: kernel memory overwrite attempt detected to ffff8801ce799bd4 (kvm_vcpu) (1320 bytes) [ 59.030799] ------------[ cut here ]------------ [ 59.035599] kernel BUG at mm/usercopy.c:84! [ 59.039927] invalid opcode: 0000 [#1] SMP KASAN [ 59.044562] Dumping ftrace buffer: [ 59.048065] (ftrace buffer empty) [ 59.051742] Modules linked in: [ 59.054905] CPU: 1 PID: 2987 Comm: syzkaller803676 Not tainted 4.14.0-rc2-next-20170929+ #32 [ 59.063441] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.072759] task: ffff8801ceeec100 task.stack: ffff8801d5450000 [ 59.078784] RIP: 0010:__check_object_size+0x3a2/0x4f0 [ 59.083935] RSP: 0018:ffff8801d5457148 EFLAGS: 00010286 [ 59.089263] RAX: 000000000000005e RBX: ffffffff84f1a260 RCX: 0000000000000000 [ 59.096499] RDX: 000000000000005e RSI: 1ffff1003aa8ade9 RDI: ffffed003aa8ae1d [ 59.103732] RBP: ffff8801d5457238 R08: ffff8801d5456838 R09: 0000000000000000 [ 59.110967] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff84f1a220 [ 59.118202] R13: ffff8801ce799bd4 R14: 0000000000000528 R15: ffffea000739e600 [ 59.125438] FS: 0000000000e01880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 59.133626] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.139481] CR2: 00007fffef84ea60 CR3: 00000001ce568000 CR4: 00000000001426e0 [ 59.146720] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.153954] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.161195] Call Trace: [ 59.163748] ? lock_release+0xd70/0xd70 [ 59.167690] ? check_stack_object+0x140/0x140 [ 59.172155] ? __might_sleep+0x95/0x190 [ 59.176101] kvm_vcpu_ioctl_set_cpuid2+0x75/0x1a0 [ 59.180913] kvm_arch_vcpu_ioctl+0x1718/0x4710 [ 59.185470] ? kvm_arch_vcpu_put+0x3e0/0x3e0 [ 59.189843] ? depot_save_stack+0x1c2/0x490 [ 59.194132] ? do_raw_spin_trylock+0x190/0x190 [ 59.198681] ? is_bpf_text_address+0xa4/0x120 [ 59.203140] ? kernel_text_address+0x102/0x140 [ 59.207686] ? __kernel_text_address+0xd/0x40 [ 59.212147] ? unwind_get_return_address+0x61/0xa0 [ 59.217044] ? trace_hardirqs_off+0xd/0x10 [ 59.221244] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 59.226310] ? depot_save_stack+0x3b5/0x490 [ 59.230601] ? __vunmap+0x247/0x2e0 [ 59.234191] ? save_stack+0xa3/0xd0 [ 59.237784] ? save_stack_trace+0x16/0x20 [ 59.241896] ? lock_acquire+0x1d5/0x580 [ 59.245834] ? vcpu_load+0x1c/0x70 [ 59.249345] ? lock_release+0xd70/0xd70 [ 59.253288] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 59.259141] ? rcu_note_context_switch+0x710/0x710 [ 59.264037] ? __might_sleep+0x95/0x190 [ 59.267975] ? vcpu_load+0x1c/0x70 [ 59.271478] ? __mutex_lock+0x16f/0x19d0 [ 59.275510] ? vcpu_load+0x1c/0x70 [ 59.279030] ? vcpu_load+0x1c/0x70 [ 59.282539] ? mutex_lock_io_nested+0x1880/0x1880 [ 59.287347] ? lock_downgrade+0x990/0x990 [ 59.291462] ? __might_fault+0xe0/0x1d0 [ 59.295401] ? vmx_vcpu_load+0x9c6/0xdd0 [ 59.299438] ? handle_invept+0x5f0/0x5f0 [ 59.303465] ? __might_sleep+0x95/0x190 [ 59.307407] ? kasan_check_read+0x11/0x20 [ 59.311524] ? _copy_to_user+0xa2/0xc0 [ 59.315377] ? kvm_arch_dev_ioctl+0xc7/0x3b0 [ 59.319751] ? kvm_vm_ioctl_check_extension+0x510/0x510 [ 59.325250] ? find_held_lock+0x39/0x1d0 [ 59.329279] ? kvm_arch_vcpu_load+0x1c1/0x890 [ 59.333739] ? kvm_arch_vcpu_load+0x4b1/0x890 [ 59.338283] ? lock_downgrade+0x990/0x990 [ 59.342395] ? kvm_arch_dev_ioctl+0x3b0/0x3b0 [ 59.346856] ? __hrtick_start+0x1d0/0x1d0 [ 59.350971] ? avc_has_extended_perms+0xef/0x12c0 [ 59.355779] ? vcpu_load+0x4b/0x70 [ 59.359286] kvm_vcpu_ioctl+0x240/0x1010 [ 59.363318] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 59.368561] ? is_bpf_text_address+0xa4/0x120 [ 59.373023] ? avc_has_extended_perms+0x7fa/0x12c0 [ 59.377917] ? unwind_get_return_address+0x8e/0xa0 [ 59.382813] ? avc_ss_reset+0x110/0x110 [ 59.386754] ? putname+0xee/0x130 [ 59.390170] ? save_stack+0xa3/0xd0 [ 59.393761] ? save_stack_trace+0x16/0x20 [ 59.397877] ? save_stack+0x43/0xd0 [ 59.401467] ? kasan_slab_free+0x71/0xc0 [ 59.405491] ? kmem_cache_free+0x77/0x280 [ 59.409602] ? putname+0xee/0x130 [ 59.413021] ? __lock_is_held+0xbc/0x140 [ 59.417070] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 59.422930] ? rcu_note_context_switch+0x710/0x710 [ 59.427821] ? get_unused_fd_flags+0x190/0x190 [ 59.432369] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 59.437609] do_vfs_ioctl+0x1b1/0x1530 [ 59.441460] ? _cond_resched+0x14/0x30 [ 59.445314] ? ioctl_preallocate+0x2b0/0x2b0 [ 59.449686] ? selinux_capable+0x40/0x40 [ 59.453709] ? putname+0xf3/0x130 [ 59.457129] ? do_sys_open+0x320/0x6d0 [ 59.460985] ? security_file_ioctl+0x89/0xb0 [ 59.465358] SyS_ioctl+0x8f/0xc0 [ 59.468690] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 59.473408] RIP: 0033:0x442fa7 [ 59.476561] RSP: 002b:00007fffef84ea58 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 59.484231] RAX: ffffffffffffffda RBX: 00007fffef84f130 RCX: 0000000000442fa7 [ 59.491483] RDX: 00007fffef84f130 RSI: 000000004008ae90 RDI: 0000000000000005 [ 59.498716] RBP: 0000000000000086 R08: 0000000000000001 R09: 000000000000007a [ 59.505949] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004040c0 [ 59.513185] R13: 0000000000404150 R14: 0000000000000004 R15: 0000000000000000 [ 59.520427] Code: 48 0f 44 da e8 c0 5b c4 ff 48 8b 85 28 ff ff ff 4d 89 f1 4c 89 e9 4c 89 e2 48 89 de 48 c7 c7 20 a3 f1 84 49 89 c0 e8 13 68 ae ff <0f> 0b 48 c7 c0 e0 a0 f1 84 eb 96 48 c7 c0 20 a1 f1 84 eb 8d 48 [ 59.539494] RIP: __check_object_size+0x3a2/0x4f0 RSP: ffff8801d5457148 [ 59.546190] ---[ end trace 8fc797317caa1800 ]--- [ 59.551086] Kernel panic - not syncing: Fatal exception [ 59.556812] Dumping ftrace buffer: [ 59.560320] (ftrace buffer empty) [ 59.563998] Kernel Offset: disabled [ 59.567591] Rebooting in 86400 seconds..