[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.82' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.622290][ T7097] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 67.664086][ T7097] ================================================================== [ 67.672366][ T7097] BUG: KASAN: slab-out-of-bounds in kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.680766][ T7097] Read of size 8 at addr ffff888097b09468 by task syz-executor412/7097 [ 67.688979][ T7097] [ 67.691294][ T7097] CPU: 0 PID: 7097 Comm: syz-executor412 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 67.701195][ T7097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.711254][ T7097] Call Trace: [ 67.714552][ T7097] dump_stack+0x188/0x20d [ 67.718872][ T7097] print_address_description.constprop.0.cold+0xd3/0x315 [ 67.725910][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.731528][ T7097] __kasan_report.cold+0x35/0x4d [ 67.736478][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.742098][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.747713][ T7097] kasan_report+0x33/0x50 [ 67.752030][ T7097] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.757500][ T7097] try_async_pf+0x12b/0xac0 [ 67.762079][ T7097] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 67.766961][ T7097] ? mark_held_locks+0x9f/0xe0 [ 67.771780][ T7097] ? mmu_topup_memory_caches+0x325/0x460 [ 67.777419][ T7097] direct_page_fault+0x27d/0x1d70 [ 67.782451][ T7097] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 67.787655][ T7097] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 67.794412][ T7097] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 67.799432][ T7097] kvm_mmu_page_fault+0x187/0x15d0 [ 67.804555][ T7097] ? kvm_deliver_exception_payload+0x42/0x1a0 [ 67.810608][ T7097] ? kvm_multiple_exception+0x51e/0x720 [ 67.816154][ T7097] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 67.822219][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.827748][ T7097] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.833710][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.839245][ T7097] ? handle_ept_violation+0x206/0x550 [ 67.844602][ T7097] ? vmx_inject_irq+0x5b0/0x5b0 [ 67.849454][ T7097] vmx_handle_exit+0x2b8/0x1700 [ 67.854309][ T7097] vcpu_enter_guest+0xfea/0x59d0 [ 67.859247][ T7097] ? vmx_vcpu_load_vmcs+0x960/0x960 [ 67.864455][ T7097] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 67.870871][ T7097] ? kvm_arch_vcpu_ioctl_run+0x23a/0x16e0 [ 67.876584][ T7097] ? lock_release+0x800/0x800 [ 67.881269][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.886800][ T7097] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.892766][ T7097] ? lockdep_hardirqs_on+0x463/0x620 [ 67.898040][ T7097] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 67.903744][ T7097] ? kvm_arch_vcpu_ioctl_run+0x27b/0x16e0 [ 67.909463][ T7097] kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 67.915000][ T7097] kvm_vcpu_ioctl+0x493/0xe60 [ 67.919666][ T7097] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.926137][ T7097] ? ioctl_file_clone+0x180/0x180 [ 67.931166][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.936703][ T7097] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.942796][ T7097] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.949197][ T7097] ksys_ioctl+0x11a/0x180 [ 67.953532][ T7097] __x64_sys_ioctl+0x6f/0xb0 [ 67.958104][ T7097] ? lockdep_hardirqs_on+0x463/0x620 [ 67.963401][ T7097] do_syscall_64+0xf6/0x7d0 [ 67.967908][ T7097] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.973825][ T7097] RIP: 0033:0x440229 [ 67.977730][ T7097] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.997346][ T7097] RSP: 002b:00007ffc6cf7d998 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.005743][ T7097] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440229 [ 68.013714][ T7097] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 68.021671][ T7097] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 68.029627][ T7097] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401ab0 [ 68.037585][ T7097] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 68.045552][ T7097] [ 68.047866][ T7097] Allocated by task 7097: [ 68.052299][ T7097] save_stack+0x1b/0x40 [ 68.056437][ T7097] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 68.062070][ T7097] kvmalloc_node+0x61/0xf0 [ 68.066471][ T7097] kvm_set_memslot+0x115/0x1530 [ 68.071316][ T7097] __kvm_set_memory_region+0xcf7/0x1320 [ 68.076859][ T7097] __x86_set_memory_region+0x2a3/0x5a0 [ 68.082316][ T7097] vmx_create_vcpu+0x2107/0x2b40 [ 68.087246][ T7097] kvm_arch_vcpu_create+0x6ef/0xb80 [ 68.092458][ T7097] kvm_vm_ioctl+0x1614/0x2400 [ 68.097117][ T7097] ksys_ioctl+0x11a/0x180 [ 68.101445][ T7097] __x64_sys_ioctl+0x6f/0xb0 [ 68.106019][ T7097] do_syscall_64+0xf6/0x7d0 [ 68.110528][ T7097] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 68.116394][ T7097] [ 68.118704][ T7097] Freed by task 16: [ 68.122496][ T7097] save_stack+0x1b/0x40 [ 68.126635][ T7097] __kasan_slab_free+0xf7/0x140 [ 68.131466][ T7097] kfree+0x109/0x2b0 [ 68.135362][ T7097] __sk_destruct+0x5ad/0x7c0 [ 68.139959][ T7097] sk_destruct+0xc6/0x100 [ 68.144288][ T7097] __sk_free+0xef/0x3d0 [ 68.148423][ T7097] sk_free+0x78/0xa0 [ 68.152317][ T7097] deferred_put_nlk_sk+0x151/0x2e0 [ 68.157430][ T7097] rcu_core+0x59f/0x1370 [ 68.161660][ T7097] __do_softirq+0x26c/0x9f7 [ 68.166155][ T7097] [ 68.168467][ T7097] The buggy address belongs to the object at ffff888097b09000 [ 68.168467][ T7097] which belongs to the cache kmalloc-2k of size 2048 [ 68.182507][ T7097] The buggy address is located 1128 bytes inside of [ 68.182507][ T7097] 2048-byte region [ffff888097b09000, ffff888097b09800) [ 68.195931][ T7097] The buggy address belongs to the page: [ 68.201550][ T7097] page:ffffea00025ec240 refcount:1 mapcount:0 mapping:000000003281d187 index:0x0 [ 68.210656][ T7097] flags: 0xfffe0000000200(slab) [ 68.215491][ T7097] raw: 00fffe0000000200 ffffea00029e3c48 ffffea00024aa088 ffff8880aa000e00 [ 68.224076][ T7097] raw: 0000000000000000 ffff888097b09000 0000000100000001 0000000000000000 [ 68.232654][ T7097] page dumped because: kasan: bad access detected [ 68.239063][ T7097] [ 68.241369][ T7097] Memory state around the buggy address: [ 68.246983][ T7097] ffff888097b09300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.255047][ T7097] ffff888097b09380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.263111][ T7097] >ffff888097b09400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 68.271165][ T7097] ^ [ 68.278619][ T7097] ffff888097b09480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.286687][ T7097] ffff888097b09500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.294727][ T7097] ================================================================== [ 68.302782][ T7097] Disabling lock debugging due to kernel taint [ 68.310270][ T7097] Kernel panic - not syncing: panic_on_warn set ... [ 68.316893][ T7097] CPU: 1 PID: 7097 Comm: syz-executor412 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 [ 68.328173][ T7097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.338229][ T7097] Call Trace: [ 68.341528][ T7097] dump_stack+0x188/0x20d [ 68.345858][ T7097] panic+0x2e3/0x75c [ 68.349779][ T7097] ? add_taint.cold+0x16/0x16 [ 68.354437][ T7097] ? preempt_schedule_common+0x5e/0xc0 [ 68.359918][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.365546][ T7097] ? preempt_schedule_thunk+0x16/0x18 [ 68.370914][ T7097] ? trace_hardirqs_on+0x55/0x220 [ 68.375937][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.381568][ T7097] end_report+0x4d/0x53 [ 68.385703][ T7097] __kasan_report.cold+0xd/0x4d [ 68.390534][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.396146][ T7097] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.401756][ T7097] kasan_report+0x33/0x50 [ 68.406088][ T7097] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.411544][ T7097] try_async_pf+0x12b/0xac0 [ 68.416043][ T7097] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 68.420893][ T7097] ? mark_held_locks+0x9f/0xe0 [ 68.425659][ T7097] ? mmu_topup_memory_caches+0x325/0x460 [ 68.431287][ T7097] direct_page_fault+0x27d/0x1d70 [ 68.436312][ T7097] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 68.441510][ T7097] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 68.448273][ T7097] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 68.453307][ T7097] kvm_mmu_page_fault+0x187/0x15d0 [ 68.458419][ T7097] ? kvm_deliver_exception_payload+0x42/0x1a0 [ 68.464482][ T7097] ? kvm_multiple_exception+0x51e/0x720 [ 68.470023][ T7097] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 68.476133][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.481808][ T7097] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.487785][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.493329][ T7097] ? handle_ept_violation+0x206/0x550 [ 68.498693][ T7097] ? vmx_inject_irq+0x5b0/0x5b0 [ 68.503545][ T7097] vmx_handle_exit+0x2b8/0x1700 [ 68.508395][ T7097] vcpu_enter_guest+0xfea/0x59d0 [ 68.513313][ T7097] ? vmx_vcpu_load_vmcs+0x960/0x960 [ 68.518492][ T7097] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 68.524886][ T7097] ? kvm_arch_vcpu_ioctl_run+0x23a/0x16e0 [ 68.530592][ T7097] ? lock_release+0x800/0x800 [ 68.535251][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.540779][ T7097] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.546741][ T7097] ? lockdep_hardirqs_on+0x463/0x620 [ 68.552012][ T7097] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 68.557713][ T7097] ? kvm_arch_vcpu_ioctl_run+0x27b/0x16e0 [ 68.563413][ T7097] kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 68.568941][ T7097] kvm_vcpu_ioctl+0x493/0xe60 [ 68.573617][ T7097] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 68.580031][ T7097] ? ioctl_file_clone+0x180/0x180 [ 68.585041][ T7097] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.590572][ T7097] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.596552][ T7097] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 68.602960][ T7097] ksys_ioctl+0x11a/0x180 [ 68.607285][ T7097] __x64_sys_ioctl+0x6f/0xb0 [ 68.611870][ T7097] ? lockdep_hardirqs_on+0x463/0x620 [ 68.617138][ T7097] do_syscall_64+0xf6/0x7d0 [ 68.621646][ T7097] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 68.627538][ T7097] RIP: 0033:0x440229 [ 68.631432][ T7097] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.651032][ T7097] RSP: 002b:00007ffc6cf7d998 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.659423][ T7097] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440229 [ 68.667374][ T7097] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 68.675327][ T7097] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 68.683365][ T7097] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401ab0 [ 68.691316][ T7097] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 68.700523][ T7097] Kernel Offset: disabled [ 68.704868][ T7097] Rebooting in 86400 seconds..