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-2,10.128.0.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.274097] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 41.281244] usercopy: kernel memory overwrite attempt detected to ffff8801d1fa9bd4 (kvm_vcpu) (1320 bytes) [ 41.282680] ------------[ cut here ]------------ [ 41.283392] kernel BUG at mm/usercopy.c:84! [ 41.283974] invalid opcode: 0000 [#1] SMP KASAN [ 41.284604] Dumping ftrace buffer: [ 41.285098] (ftrace buffer empty) [ 41.285592] Modules linked in: [ 41.286027] CPU: 1 PID: 2987 Comm: syzkaller189640 Not tainted 4.14.0-rc5-next-20171018+ #36 [ 41.287166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.288408] task: ffff8801d1d7a0c0 task.stack: ffff8801d18b0000 [ 41.289235] RIP: 0010:__check_object_size+0x3a2/0x4f0 [ 41.289919] RSP: 0018:ffff8801d18b7148 EFLAGS: 00010286 [ 41.290662] RAX: 000000000000005e RBX: ffffffff8511a0e0 RCX: 0000000000000000 [ 41.291615] RDX: 000000000000005e RSI: 1ffff1003a316de9 RDI: ffffed003a316e1d [ 41.292594] RBP: ffff8801d18b7238 R08: 0000000000000001 R09: 0000000000000000 [ 41.293546] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8511a0a0 [ 41.294497] R13: ffff8801d1fa9bd4 R14: 0000000000000528 R15: ffffea000747ea00 [ 41.301734] FS: 0000000001b2c880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 41.309928] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.315778] CR2: 0000000020ebb000 CR3: 00000001d233a000 CR4: 00000000001426e0 [ 41.323037] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.330275] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.337511] Call Trace: [ 41.340070] ? lock_release+0xa40/0xa40 [ 41.344015] ? check_stack_object+0x140/0x140 [ 41.348478] ? check_noncircular+0x20/0x20 [ 41.352684] ? __might_sleep+0x95/0x190 [ 41.356632] kvm_vcpu_ioctl_set_cpuid2+0x75/0x1a0 [ 41.361445] kvm_arch_vcpu_ioctl+0x1718/0x4710 [ 41.365995] ? find_held_lock+0x35/0x1d0 [ 41.370025] ? kvm_arch_vcpu_put+0x3e0/0x3e0 [ 41.374402] ? depot_save_stack+0x3b5/0x490 [ 41.378689] ? lock_downgrade+0x990/0x990 [ 41.382803] ? do_raw_spin_trylock+0x190/0x190 [ 41.387357] ? is_bpf_text_address+0xa4/0x120 [ 41.391824] ? kernel_text_address+0x102/0x140 [ 41.396373] ? __kernel_text_address+0xd/0x40 [ 41.400836] ? unwind_get_return_address+0x61/0xa0 [ 41.405731] ? trace_hardirqs_off+0xd/0x10 [ 41.409934] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 41.415001] ? depot_save_stack+0x3b5/0x490 [ 41.419296] ? __vunmap+0x247/0x2e0 [ 41.422892] ? save_stack+0xa3/0xd0 [ 41.426484] ? lock_acquire+0x1d5/0x580 [ 41.430421] ? lock_acquire+0x1d5/0x580 [ 41.434360] ? vcpu_load+0x1c/0x70 [ 41.437866] ? lock_release+0xa40/0xa40 [ 41.441810] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 41.447664] ? rcu_note_context_switch+0x710/0x710 [ 41.452563] ? __might_sleep+0x95/0x190 [ 41.456502] ? vcpu_load+0x1c/0x70 [ 41.460010] ? __mutex_lock+0x16f/0x19d0 [ 41.464039] ? vcpu_load+0x1c/0x70 [ 41.467547] ? vcpu_load+0x1c/0x70 [ 41.471056] ? trace_hardirqs_off+0xd/0x10 [ 41.475259] ? mutex_lock_io_nested+0x1880/0x1880 [ 41.480069] ? find_held_lock+0x35/0x1d0 [ 41.484105] ? __might_fault+0x110/0x1d0 [ 41.488130] ? lock_downgrade+0x990/0x990 [ 41.492246] ? vmx_vcpu_load+0x9c6/0xdd0 [ 41.496274] ? handle_invept+0x5f0/0x5f0 [ 41.500305] ? __might_sleep+0x95/0x190 [ 41.504247] ? kasan_check_read+0x11/0x20 [ 41.508361] ? _copy_to_user+0xa2/0xc0 [ 41.512217] ? kvm_arch_dev_ioctl+0xc7/0x3b0 [ 41.516598] ? kvm_vm_ioctl_check_extension+0x510/0x510 [ 41.521932] ? kvm_arch_vcpu_load+0x1c1/0x890 [ 41.526395] ? kvm_arch_vcpu_load+0x4b1/0x890 [ 41.530856] ? find_held_lock+0x35/0x1d0 [ 41.534882] ? kvm_arch_dev_ioctl+0x3b0/0x3b0 [ 41.539342] ? __hrtick_start+0x1d0/0x1d0 [ 41.543461] ? avc_has_extended_perms+0x6e5/0x12c0 [ 41.548365] ? vcpu_load+0x4b/0x70 [ 41.551876] kvm_vcpu_ioctl+0x240/0x1010 [ 41.555908] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 41.561154] ? is_bpf_text_address+0xa4/0x120 [ 41.565619] ? avc_has_extended_perms+0x7fa/0x12c0 [ 41.570517] ? unwind_get_return_address+0x6e/0xa0 [ 41.575414] ? avc_ss_reset+0x110/0x110 [ 41.579358] ? putname+0xee/0x130 [ 41.582780] ? save_stack+0xa3/0xd0 [ 41.586370] ? save_stack+0x43/0xd0 [ 41.589960] ? kasan_slab_free+0x71/0xc0 [ 41.593985] ? kmem_cache_free+0x77/0x280 [ 41.598108] ? putname+0xee/0x130 [ 41.601529] ? do_sys_open+0x31b/0x6d0 [ 41.605383] ? __lock_is_held+0xb6/0x140 [ 41.609415] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 41.615269] ? rcu_note_context_switch+0x710/0x710 [ 41.620162] ? get_unused_fd_flags+0x190/0x190 [ 41.624713] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 41.629953] do_vfs_ioctl+0x1b1/0x1520 [ 41.633808] ? _cond_resched+0x14/0x30 [ 41.637662] ? ioctl_preallocate+0x2b0/0x2b0 [ 41.642037] ? selinux_capable+0x40/0x40 [ 41.646065] ? putname+0xf3/0x130 [ 41.649485] ? do_sys_open+0x320/0x6d0 [ 41.653346] ? security_file_ioctl+0x89/0xb0 [ 41.657723] SyS_ioctl+0x8f/0xc0 [ 41.661063] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 41.665784] RIP: 0033:0x442f87 [ 41.668938] RSP: 002b:00007ffff56d42c8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 41.676609] RAX: ffffffffffffffda RBX: 00007ffff56d49a0 RCX: 0000000000442f87 [ 41.683845] RDX: 00007ffff56d49a0 RSI: 000000004008ae90 RDI: 0000000000000005 [ 41.691080] RBP: 0000000000000082 R08: 0000000000000001 R09: ffffffffffffffff [ 41.698315] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004040a0 [ 41.705549] R13: 0000000000404130 R14: 0000000000000000 R15: 0000000000000000 [ 41.712798] Code: 48 0f 44 da e8 70 f0 c3 ff 48 8b 85 28 ff ff ff 4d 89 f1 4c 89 e9 4c 89 e2 48 89 de 48 c7 c7 a0 a1 11 85 49 89 c0 e8 c3 fb ad ff <0f> 0b 48 c7 c0 60 9f 11 85 eb 96 48 c7 c0 a0 9f 11 85 eb 8d 48 [ 41.731867] RIP: __check_object_size+0x3a2/0x4f0 RSP: ffff8801d18b7148 [ 41.738589] ---[ end trace 2dd34d8a4584b2a6 ]--- [ 41.743621] Kernel panic - not syncing: Fatal exception [ 41.749335] Dumping ftrace buffer: [ 41.752850] (ftrace buffer empty) [ 41.756527] Kernel Offset: disabled [ 41.760122] Rebooting in 86400 seconds..