[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 9.446533] rsyslogd (2863) used greatest stack depth: 15136 bytes left [?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-mmots-kasan-gce-4,10.128.15.225' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.209316] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 32.214198] usercopy: kernel memory overwrite attempt detected to ffff8801d21a1bd4 (kvm_vcpu) (1320 bytes) [ 32.215568] ------------[ cut here ]------------ [ 32.216225] kernel BUG at mm/usercopy.c:84! [ 32.216804] invalid opcode: 0000 [#1] SMP KASAN [ 32.217424] Dumping ftrace buffer: [ 32.217932] (ftrace buffer empty) [ 32.218478] Modules linked in: [ 32.218914] CPU: 0 PID: 2987 Comm: syzkaller581243 Not tainted 4.14.0-rc5-mm1+ #20 [ 32.219921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.221156] task: ffff8801d1d2a7c0 task.stack: ffff8801d2208000 [ 32.221961] RIP: 0010:__check_object_size+0x3a2/0x4f0 [ 32.222657] RSP: 0018:ffff8801d220f148 EFLAGS: 00010286 [ 32.223367] RAX: 000000000000005e RBX: ffffffff8511a100 RCX: 0000000000000000 [ 32.224318] RDX: 000000000000005e RSI: 1ffff1003a441de9 RDI: ffffed003a441e1d [ 32.225269] RBP: ffff8801d220f238 R08: 0000000000000001 R09: 0000000000000000 [ 32.226239] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8511a0c0 [ 32.227237] R13: ffff8801d21a1bd4 R14: 0000000000000528 R15: ffffea0007486800 [ 32.228206] FS: 00000000026b0880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.229294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.230068] CR2: 00007ffe3cb68a90 CR3: 00000001d04d3000 CR4: 00000000001426f0 [ 32.237307] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.244543] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.252384] Call Trace: [ 32.254936] ? lock_release+0xa40/0xa40 [ 32.258877] ? check_stack_object+0x140/0x140 [ 32.263336] ? check_noncircular+0x20/0x20 [ 32.267540] ? __might_sleep+0x95/0x190 [ 32.271572] kvm_vcpu_ioctl_set_cpuid2+0x75/0x1a0 [ 32.276383] kvm_arch_vcpu_ioctl+0x1718/0x4710 [ 32.280932] ? find_held_lock+0x35/0x1d0 [ 32.284961] ? kvm_arch_vcpu_put+0x3e0/0x3e0 [ 32.289339] ? depot_save_stack+0x3b5/0x490 [ 32.293624] ? lock_downgrade+0x990/0x990 [ 32.297738] ? do_raw_spin_trylock+0x190/0x190 [ 32.302300] ? is_bpf_text_address+0xa4/0x120 [ 32.306761] ? kernel_text_address+0x102/0x140 [ 32.311310] ? __kernel_text_address+0xd/0x40 [ 32.315770] ? unwind_get_return_address+0x61/0xa0 [ 32.320665] ? trace_hardirqs_off+0xd/0x10 [ 32.324882] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 32.330038] ? depot_save_stack+0x3b5/0x490 [ 32.334329] ? __vunmap+0x247/0x2e0 [ 32.337925] ? save_stack+0xa3/0xd0 [ 32.341518] ? lock_acquire+0x1d5/0x580 [ 32.345465] ? lock_acquire+0x1d5/0x580 [ 32.349410] ? vcpu_load+0x1c/0x70 [ 32.352918] ? lock_release+0xa40/0xa40 [ 32.356859] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 32.362713] ? rcu_note_context_switch+0x710/0x710 [ 32.367608] ? __might_sleep+0x95/0x190 [ 32.371547] ? vcpu_load+0x1c/0x70 [ 32.375053] ? __mutex_lock+0x16f/0x19d0 [ 32.379082] ? vcpu_load+0x1c/0x70 [ 32.382590] ? vcpu_load+0x1c/0x70 [ 32.386096] ? trace_hardirqs_off+0xd/0x10 [ 32.390298] ? mutex_lock_io_nested+0x1880/0x1880 [ 32.395106] ? find_held_lock+0x35/0x1d0 [ 32.399137] ? __might_fault+0x110/0x1d0 [ 32.403163] ? lock_downgrade+0x990/0x990 [ 32.407278] ? vmx_vcpu_load+0x9c6/0xdd0 [ 32.411307] ? handle_invept+0x5f0/0x5f0 [ 32.415338] ? __might_sleep+0x95/0x190 [ 32.419284] ? kasan_check_read+0x11/0x20 [ 32.423396] ? _copy_to_user+0xa2/0xc0 [ 32.427254] ? kvm_arch_dev_ioctl+0xc7/0x3b0 [ 32.431630] ? kvm_vm_ioctl_check_extension+0x510/0x510 [ 32.436962] ? kvm_arch_vcpu_load+0x1c1/0x890 [ 32.441426] ? kvm_arch_vcpu_load+0x4b1/0x890 [ 32.445890] ? find_held_lock+0x35/0x1d0 [ 32.449918] ? kvm_arch_dev_ioctl+0x3b0/0x3b0 [ 32.454378] ? __hrtick_start+0x1d0/0x1d0 [ 32.458494] ? avc_has_extended_perms+0x6e5/0x12c0 [ 32.463391] ? vcpu_load+0x4b/0x70 [ 32.466899] kvm_vcpu_ioctl+0x240/0x1010 [ 32.470926] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 32.476168] ? is_bpf_text_address+0xa4/0x120 [ 32.480629] ? avc_has_extended_perms+0x7fa/0x12c0 [ 32.485524] ? unwind_get_return_address+0x6e/0xa0 [ 32.490425] ? avc_ss_reset+0x110/0x110 [ 32.494365] ? putname+0xee/0x130 [ 32.497784] ? save_stack+0xa3/0xd0 [ 32.501374] ? save_stack+0x43/0xd0 [ 32.504964] ? kasan_slab_free+0x71/0xc0 [ 32.508988] ? kmem_cache_free+0x77/0x280 [ 32.513099] ? putname+0xee/0x130 [ 32.516516] ? do_sys_open+0x31b/0x6d0 [ 32.520373] ? __lock_is_held+0xb6/0x140 [ 32.524408] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 32.530263] ? rcu_note_context_switch+0x710/0x710 [ 32.535157] ? get_unused_fd_flags+0x190/0x190 [ 32.539706] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 32.544948] do_vfs_ioctl+0x1b1/0x1520 [ 32.548801] ? _cond_resched+0x14/0x30 [ 32.552655] ? ioctl_preallocate+0x2b0/0x2b0 [ 32.557030] ? selinux_capable+0x40/0x40 [ 32.561058] ? putname+0xf3/0x130 [ 32.564477] ? do_sys_open+0x320/0x6d0 [ 32.568335] ? security_file_ioctl+0x89/0xb0 [ 32.572709] SyS_ioctl+0x8f/0xc0 [ 32.576044] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 32.580764] RIP: 0033:0x442f77 [ 32.583920] RSP: 002b:00007ffe3cb68a88 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 32.591592] RAX: ffffffffffffffda RBX: 00007ffe3cb69160 RCX: 0000000000442f77 [ 32.598827] RDX: 00007ffe3cb69160 RSI: 000000004008ae90 RDI: 0000000000000005 [ 32.606060] RBP: 0000000000000082 R08: 0000000000000001 R09: 0000000000000040 [ 32.613296] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000404090 [ 32.620530] R13: 0000000000404120 R14: 0000000000000004 R15: 0000000000000000 [ 32.627790] Code: 48 0f 44 da e8 e0 d7 c3 ff 48 8b 85 28 ff ff ff 4d 89 f1 4c 89 e9 4c 89 e2 48 89 de 48 c7 c7 c0 a1 11 85 49 89 c0 e8 33 e3 ad ff <0f> 0b 48 c7 c0 80 9f 11 85 eb 96 48 c7 c0 c0 9f 11 85 eb 8d 48 [ 32.646853] RIP: __check_object_size+0x3a2/0x4f0 RSP: ffff8801d220f148 [ 32.653624] ---[ end trace af9021cc1ce9214a ]--- [ 32.658370] Kernel panic - not syncing: Fatal exception [ 32.664053] Dumping ftrace buffer: [ 32.667562] (ftrace buffer empty) [ 32.671240] Kernel Offset: disabled [ 32.674836] Rebooting in 86400 seconds..