[ OK ] Started Getty on tty2. Starting Load/Save RF Kill Switch Status... [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.194' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.468493][ T7049] 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. [ 59.508714][ T7049] ================================================================== [ 59.517171][ T7049] BUG: KASAN: slab-out-of-bounds in kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 59.525826][ T7049] Read of size 8 at addr ffff88809d9bf468 by task syz-executor328/7049 [ 59.534051][ T7049] [ 59.536380][ T7049] CPU: 1 PID: 7049 Comm: syz-executor328 Not tainted 5.6.0-syzkaller #0 [ 59.544696][ T7049] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.554769][ T7049] Call Trace: [ 59.558074][ T7049] dump_stack+0x188/0x20d [ 59.562456][ T7049] print_address_description.constprop.0.cold+0xd3/0x315 [ 59.569468][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 59.575093][ T7049] __kasan_report.cold+0x35/0x4d [ 59.580026][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 59.585653][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 59.591269][ T7049] kasan_report+0x33/0x50 [ 59.595599][ T7049] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 59.601112][ T7049] try_async_pf+0x12b/0xac0 [ 59.605622][ T7049] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 59.610470][ T7049] ? mark_held_locks+0x9f/0xe0 [ 59.615217][ T7049] ? mmu_topup_memory_caches+0x325/0x460 [ 59.621065][ T7049] direct_page_fault+0x27d/0x1d70 [ 59.626087][ T7049] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 59.631329][ T7049] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 59.638331][ T7049] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 59.643362][ T7049] kvm_mmu_page_fault+0x187/0x15d0 [ 59.648473][ T7049] ? kvm_deliver_exception_payload+0x42/0x1a0 [ 59.654530][ T7049] ? kvm_multiple_exception+0x51e/0x720 [ 59.660077][ T7049] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 59.666132][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.671676][ T7049] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.677642][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.683288][ T7049] ? handle_ept_violation+0x206/0x550 [ 59.688653][ T7049] ? vmx_inject_irq+0x5b0/0x5b0 [ 59.693505][ T7049] vmx_handle_exit+0x2b8/0x1700 [ 59.698349][ T7049] vcpu_enter_guest+0xfea/0x59d0 [ 59.703458][ T7049] ? vmx_vcpu_load_vmcs+0x960/0x960 [ 59.708665][ T7049] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 59.715068][ T7049] ? kvm_arch_vcpu_ioctl_run+0x23a/0x16a0 [ 59.720881][ T7049] ? lock_release+0x800/0x800 [ 59.725648][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.731179][ T7049] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.737144][ T7049] ? lockdep_hardirqs_on+0x463/0x620 [ 59.742486][ T7049] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 59.748204][ T7049] ? kvm_arch_vcpu_ioctl_run+0x27b/0x16a0 [ 59.753920][ T7049] kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 59.759469][ T7049] kvm_vcpu_ioctl+0x493/0xe60 [ 59.764147][ T7049] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.770563][ T7049] ? ioctl_file_clone+0x180/0x180 [ 59.775582][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.781112][ T7049] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.787080][ T7049] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.793477][ T7049] ksys_ioctl+0x11a/0x180 [ 59.797791][ T7049] __x64_sys_ioctl+0x6f/0xb0 [ 59.802361][ T7049] ? lockdep_hardirqs_on+0x463/0x620 [ 59.807627][ T7049] do_syscall_64+0xf6/0x7d0 [ 59.812125][ T7049] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.818021][ T7049] RIP: 0033:0x440209 [ 59.821899][ T7049] 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 [ 59.841482][ T7049] RSP: 002b:00007ffc71d0c998 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 59.849883][ T7049] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 59.857834][ T7049] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 59.865786][ T7049] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 59.873765][ T7049] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401a90 [ 59.881726][ T7049] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 59.889700][ T7049] [ 59.892010][ T7049] Allocated by task 7049: [ 59.896351][ T7049] save_stack+0x1b/0x40 [ 59.900533][ T7049] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 59.906156][ T7049] kvmalloc_node+0x61/0xf0 [ 59.910563][ T7049] kvm_set_memslot+0x115/0x1530 [ 59.915402][ T7049] __kvm_set_memory_region+0xcf7/0x1320 [ 59.920950][ T7049] kvm_set_memory_region+0x29/0x50 [ 59.926044][ T7049] kvm_vm_ioctl+0x678/0x23e0 [ 59.930614][ T7049] ksys_ioctl+0x11a/0x180 [ 59.934921][ T7049] __x64_sys_ioctl+0x6f/0xb0 [ 59.939488][ T7049] do_syscall_64+0xf6/0x7d0 [ 59.943971][ T7049] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.949842][ T7049] [ 59.952165][ T7049] Freed by task 16: [ 59.955952][ T7049] save_stack+0x1b/0x40 [ 59.960084][ T7049] __kasan_slab_free+0xf7/0x140 [ 59.964909][ T7049] kfree+0x109/0x2b0 [ 59.968794][ T7049] __sk_destruct+0x5ad/0x7c0 [ 59.973358][ T7049] sk_destruct+0xc6/0x100 [ 59.977675][ T7049] __sk_free+0xef/0x3d0 [ 59.981816][ T7049] sk_free+0x78/0xa0 [ 59.985693][ T7049] deferred_put_nlk_sk+0x151/0x2e0 [ 59.990779][ T7049] rcu_core+0x59f/0x1370 [ 59.995002][ T7049] __do_softirq+0x26c/0x9f7 [ 59.999473][ T7049] [ 60.001778][ T7049] The buggy address belongs to the object at ffff88809d9bf000 [ 60.001778][ T7049] which belongs to the cache kmalloc-2k of size 2048 [ 60.015817][ T7049] The buggy address is located 1128 bytes inside of [ 60.015817][ T7049] 2048-byte region [ffff88809d9bf000, ffff88809d9bf800) [ 60.029237][ T7049] The buggy address belongs to the page: [ 60.034862][ T7049] page:ffffea0002766fc0 refcount:1 mapcount:0 mapping:000000001f08f916 index:0x0 [ 60.043943][ T7049] flags: 0xfffe0000000200(slab) [ 60.048818][ T7049] raw: 00fffe0000000200 ffffea00025d92c8 ffffea0002a1c888 ffff8880aa000e00 [ 60.059750][ T7049] raw: 0000000000000000 ffff88809d9bf000 0000000100000001 0000000000000000 [ 60.068321][ T7049] page dumped because: kasan: bad access detected [ 60.074731][ T7049] [ 60.077269][ T7049] Memory state around the buggy address: [ 60.082880][ T7049] ffff88809d9bf300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.090933][ T7049] ffff88809d9bf380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.098990][ T7049] >ffff88809d9bf400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.107092][ T7049] ^ [ 60.114652][ T7049] ffff88809d9bf480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.122866][ T7049] ffff88809d9bf500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.130912][ T7049] ================================================================== [ 60.139170][ T7049] Disabling lock debugging due to kernel taint [ 60.147076][ T7049] Kernel panic - not syncing: panic_on_warn set ... [ 60.153693][ T7049] CPU: 0 PID: 7049 Comm: syz-executor328 Tainted: G B 5.6.0-syzkaller #0 [ 60.163400][ T7049] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.173459][ T7049] Call Trace: [ 60.176745][ T7049] dump_stack+0x188/0x20d [ 60.181166][ T7049] panic+0x2e3/0x75c [ 60.185039][ T7049] ? add_taint.cold+0x16/0x16 [ 60.189815][ T7049] ? preempt_schedule_common+0x5e/0xc0 [ 60.195259][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 60.200872][ T7049] ? preempt_schedule_thunk+0x16/0x18 [ 60.206261][ T7049] ? trace_hardirqs_on+0x55/0x220 [ 60.211280][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 60.216896][ T7049] end_report+0x4d/0x53 [ 60.221151][ T7049] __kasan_report.cold+0xd/0x4d [ 60.225993][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 60.231615][ T7049] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 60.237232][ T7049] kasan_report+0x33/0x50 [ 60.241545][ T7049] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 60.247047][ T7049] try_async_pf+0x12b/0xac0 [ 60.251546][ T7049] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 60.256380][ T7049] ? mark_held_locks+0x9f/0xe0 [ 60.261134][ T7049] ? mmu_topup_memory_caches+0x325/0x460 [ 60.266750][ T7049] direct_page_fault+0x27d/0x1d70 [ 60.271756][ T7049] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 60.276931][ T7049] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 60.283674][ T7049] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 60.288684][ T7049] kvm_mmu_page_fault+0x187/0x15d0 [ 60.293780][ T7049] ? kvm_deliver_exception_payload+0x42/0x1a0 [ 60.299849][ T7049] ? kvm_multiple_exception+0x51e/0x720 [ 60.305369][ T7049] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 60.311413][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.316933][ T7049] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.322910][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.328706][ T7049] ? handle_ept_violation+0x206/0x550 [ 60.334075][ T7049] ? vmx_inject_irq+0x5b0/0x5b0 [ 60.338920][ T7049] vmx_handle_exit+0x2b8/0x1700 [ 60.343758][ T7049] vcpu_enter_guest+0xfea/0x59d0 [ 60.348676][ T7049] ? vmx_vcpu_load_vmcs+0x960/0x960 [ 60.353861][ T7049] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 60.360250][ T7049] ? kvm_arch_vcpu_ioctl_run+0x23a/0x16a0 [ 60.365963][ T7049] ? lock_release+0x800/0x800 [ 60.370621][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.376157][ T7049] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.382127][ T7049] ? lockdep_hardirqs_on+0x463/0x620 [ 60.387394][ T7049] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 60.393089][ T7049] ? kvm_arch_vcpu_ioctl_run+0x27b/0x16a0 [ 60.398785][ T7049] kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 60.404320][ T7049] kvm_vcpu_ioctl+0x493/0xe60 [ 60.408974][ T7049] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 60.415364][ T7049] ? ioctl_file_clone+0x180/0x180 [ 60.420367][ T7049] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.425889][ T7049] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.431862][ T7049] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 60.438287][ T7049] ksys_ioctl+0x11a/0x180 [ 60.442601][ T7049] __x64_sys_ioctl+0x6f/0xb0 [ 60.447169][ T7049] ? lockdep_hardirqs_on+0x463/0x620 [ 60.452433][ T7049] do_syscall_64+0xf6/0x7d0 [ 60.456917][ T7049] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.462783][ T7049] RIP: 0033:0x440209 [ 60.466662][ T7049] 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 [ 60.486258][ T7049] RSP: 002b:00007ffc71d0c998 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 60.494643][ T7049] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 60.502596][ T7049] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 60.510554][ T7049] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 60.518647][ T7049] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401a90 [ 60.526606][ T7049] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 60.535965][ T7049] Kernel Offset: disabled [ 60.540299][ T7049] Rebooting in 86400 seconds..