[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ 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 '10.128.0.111' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.078278][ T7082] 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. [ 70.415705][ T7082] ================================================================== [ 70.424002][ T7082] BUG: KASAN: slab-out-of-bounds in kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 70.432517][ T7082] Read of size 8 at addr ffff8880a2e2c468 by task syz-executor841/7082 [ 70.440799][ T7082] [ 70.443164][ T7082] CPU: 0 PID: 7082 Comm: syz-executor841 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 70.453187][ T7082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.463392][ T7082] Call Trace: [ 70.466794][ T7082] dump_stack+0x188/0x20d [ 70.471253][ T7082] print_address_description.constprop.0.cold+0xd3/0x315 [ 70.478328][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 70.484018][ T7082] __kasan_report.cold+0x35/0x4d [ 70.489000][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 70.494671][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 70.500488][ T7082] kasan_report+0x33/0x50 [ 70.504978][ T7082] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 70.510463][ T7082] try_async_pf+0x12b/0xac0 [ 70.515007][ T7082] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 70.519896][ T7082] ? mark_held_locks+0x9f/0xe0 [ 70.524697][ T7082] ? mmu_topup_memory_caches+0x325/0x460 [ 70.530358][ T7082] direct_page_fault+0x27d/0x1d70 [ 70.535435][ T7082] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 70.540755][ T7082] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 70.547736][ T7082] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 70.553036][ T7082] kvm_mmu_page_fault+0x187/0x15d0 [ 70.558173][ T7082] ? find_held_lock+0x2d/0x110 [ 70.562958][ T7082] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 70.569070][ T7082] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.574643][ T7082] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.580693][ T7082] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.586364][ T7082] ? handle_ept_violation+0x206/0x550 [ 70.591872][ T7082] ? vmx_inject_irq+0x5b0/0x5b0 [ 70.596776][ T7082] vmx_handle_exit+0x2b8/0x1700 [ 70.601657][ T7082] vcpu_enter_guest+0xfea/0x59d0 [ 70.606621][ T7082] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 70.613049][ T7082] ? kvm_vcpu_kick+0x162/0x2a0 [ 70.617832][ T7082] ? __apic_accept_irq+0x423/0xb80 [ 70.622963][ T7082] ? kvm_lapic_enable_pv_eoi+0x160/0x160 [ 70.628627][ T7082] ? kvm_check_async_pf_completion+0x2a4/0x400 [ 70.634814][ T7082] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 70.640573][ T7082] kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 70.646153][ T7082] kvm_vcpu_ioctl+0x493/0xe60 [ 70.650852][ T7082] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 70.657301][ T7082] ? ioctl_file_clone+0x180/0x180 [ 70.662359][ T7082] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.667991][ T7082] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.674167][ T7082] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 70.680604][ T7082] ksys_ioctl+0x11a/0x180 [ 70.684951][ T7082] __x64_sys_ioctl+0x6f/0xb0 [ 70.689546][ T7082] ? lockdep_hardirqs_on+0x463/0x620 [ 70.694905][ T7082] do_syscall_64+0xf6/0x7d0 [ 70.699433][ T7082] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 70.705337][ T7082] RIP: 0033:0x440269 [ 70.709261][ T7082] 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 [ 70.728875][ T7082] RSP: 002b:00007ffed6b311d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 70.737332][ T7082] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 [ 70.745325][ T7082] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 70.753325][ T7082] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 70.761311][ T7082] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401af0 [ 70.769303][ T7082] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 70.777353][ T7082] [ 70.779767][ T7082] Allocated by task 7082: [ 70.784829][ T7082] save_stack+0x1b/0x40 [ 70.789093][ T7082] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 70.794751][ T7082] kvmalloc_node+0x61/0xf0 [ 70.799192][ T7082] kvm_set_memslot+0x115/0x1530 [ 70.804052][ T7082] __kvm_set_memory_region+0xcf7/0x1320 [ 70.809612][ T7082] __x86_set_memory_region+0x2a3/0x5a0 [ 70.815080][ T7082] vmx_create_vcpu+0x2107/0x2b40 [ 70.820165][ T7082] kvm_arch_vcpu_create+0x6ef/0xb80 [ 70.825391][ T7082] kvm_vm_ioctl+0x1614/0x2400 [ 70.830145][ T7082] ksys_ioctl+0x11a/0x180 [ 70.834494][ T7082] __x64_sys_ioctl+0x6f/0xb0 [ 70.839187][ T7082] do_syscall_64+0xf6/0x7d0 [ 70.843711][ T7082] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 70.849628][ T7082] [ 70.851962][ T7082] Freed by task 3223: [ 70.855960][ T7082] save_stack+0x1b/0x40 [ 70.860126][ T7082] __kasan_slab_free+0xf7/0x140 [ 70.864996][ T7082] kfree+0x109/0x2b0 [ 70.868916][ T7082] process_one_work+0x965/0x16a0 [ 70.873861][ T7082] worker_thread+0x96/0xe20 [ 70.878368][ T7082] kthread+0x388/0x470 [ 70.882448][ T7082] ret_from_fork+0x24/0x30 [ 70.886849][ T7082] [ 70.889200][ T7082] The buggy address belongs to the object at ffff8880a2e2c000 [ 70.889200][ T7082] which belongs to the cache kmalloc-2k of size 2048 [ 70.903267][ T7082] The buggy address is located 1128 bytes inside of [ 70.903267][ T7082] 2048-byte region [ffff8880a2e2c000, ffff8880a2e2c800) [ 70.916755][ T7082] The buggy address belongs to the page: [ 70.922402][ T7082] page:ffffea00028b8b00 refcount:1 mapcount:0 mapping:000000008f8b9fc1 index:0x0 [ 70.931509][ T7082] flags: 0xfffe0000000200(slab) [ 70.936382][ T7082] raw: 00fffe0000000200 ffffea00028bc1c8 ffffea00026ef5c8 ffff8880aa000e00 [ 70.944977][ T7082] raw: 0000000000000000 ffff8880a2e2c000 0000000100000001 0000000000000000 [ 70.953557][ T7082] page dumped because: kasan: bad access detected [ 70.959966][ T7082] [ 70.962299][ T7082] Memory state around the buggy address: [ 70.968005][ T7082] ffff8880a2e2c300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.976361][ T7082] ffff8880a2e2c380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.984446][ T7082] >ffff8880a2e2c400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 70.992520][ T7082] ^ [ 70.999979][ T7082] ffff8880a2e2c480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 71.008045][ T7082] ffff8880a2e2c500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 71.016127][ T7082] ================================================================== [ 71.024894][ T7082] Disabling lock debugging due to kernel taint [ 71.031558][ T7082] Kernel panic - not syncing: panic_on_warn set ... [ 71.038198][ T7082] CPU: 0 PID: 7082 Comm: syz-executor841 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 [ 71.049519][ T7082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.059599][ T7082] Call Trace: [ 71.062922][ T7082] dump_stack+0x188/0x20d [ 71.067279][ T7082] panic+0x2e3/0x75c [ 71.071212][ T7082] ? add_taint.cold+0x16/0x16 [ 71.075918][ T7082] ? preempt_schedule_common+0x5e/0xc0 [ 71.081400][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 71.087051][ T7082] ? preempt_schedule_thunk+0x16/0x18 [ 71.092543][ T7082] ? trace_hardirqs_on+0x55/0x220 [ 71.097752][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 71.103490][ T7082] end_report+0x4d/0x53 [ 71.107998][ T7082] __kasan_report.cold+0xd/0x4d [ 71.113068][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 71.120536][ T7082] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 71.126186][ T7082] kasan_report+0x33/0x50 [ 71.130684][ T7082] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 71.136172][ T7082] try_async_pf+0x12b/0xac0 [ 71.140823][ T7082] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 71.145691][ T7082] ? mark_held_locks+0x9f/0xe0 [ 71.150590][ T7082] ? mmu_topup_memory_caches+0x325/0x460 [ 71.156226][ T7082] direct_page_fault+0x27d/0x1d70 [ 71.161289][ T7082] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 71.166521][ T7082] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 71.173299][ T7082] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 71.178441][ T7082] kvm_mmu_page_fault+0x187/0x15d0 [ 71.183554][ T7082] ? find_held_lock+0x2d/0x110 [ 71.188342][ T7082] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 71.194417][ T7082] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.199988][ T7082] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.206105][ T7082] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.211685][ T7082] ? handle_ept_violation+0x206/0x550 [ 71.217077][ T7082] ? vmx_inject_irq+0x5b0/0x5b0 [ 71.221937][ T7082] vmx_handle_exit+0x2b8/0x1700 [ 71.226797][ T7082] vcpu_enter_guest+0xfea/0x59d0 [ 71.231742][ T7082] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 71.238172][ T7082] ? kvm_vcpu_kick+0x162/0x2a0 [ 71.242934][ T7082] ? __apic_accept_irq+0x423/0xb80 [ 71.248065][ T7082] ? kvm_lapic_enable_pv_eoi+0x160/0x160 [ 71.253699][ T7082] ? kvm_check_async_pf_completion+0x2a4/0x400 [ 71.259865][ T7082] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 71.265591][ T7082] kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 71.271141][ T7082] kvm_vcpu_ioctl+0x493/0xe60 [ 71.275856][ T7082] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 71.282303][ T7082] ? ioctl_file_clone+0x180/0x180 [ 71.287347][ T7082] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.292900][ T7082] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.298893][ T7082] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 71.305306][ T7082] ksys_ioctl+0x11a/0x180 [ 71.309637][ T7082] __x64_sys_ioctl+0x6f/0xb0 [ 71.314226][ T7082] ? lockdep_hardirqs_on+0x463/0x620 [ 71.319524][ T7082] do_syscall_64+0xf6/0x7d0 [ 71.324043][ T7082] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 71.329933][ T7082] RIP: 0033:0x440269 [ 71.333824][ T7082] 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 [ 71.353526][ T7082] RSP: 002b:00007ffed6b311d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 71.361929][ T7082] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 [ 71.369891][ T7082] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 71.377855][ T7082] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 71.385818][ T7082] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401af0 [ 71.393784][ T7082] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 71.402967][ T7082] Kernel Offset: disabled [ 71.407330][ T7082] Rebooting in 86400 seconds..