[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.124518][ T7070] 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. [ 67.456342][ T7070] ================================================================== [ 67.464941][ T7070] BUG: KASAN: slab-out-of-bounds in kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.473275][ T7070] Read of size 8 at addr ffff88809e204468 by task syz-executor262/7070 [ 67.481529][ T7070] [ 67.483856][ T7070] CPU: 0 PID: 7070 Comm: syz-executor262 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 67.493727][ T7070] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.503769][ T7070] Call Trace: [ 67.507146][ T7070] dump_stack+0x188/0x20d [ 67.511468][ T7070] print_address_description.constprop.0.cold+0xd3/0x315 [ 67.518509][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.524142][ T7070] __kasan_report.cold+0x35/0x4d [ 67.529070][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.534692][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.540317][ T7070] kasan_report+0x33/0x50 [ 67.544634][ T7070] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.550091][ T7070] try_async_pf+0x12b/0xac0 [ 67.554599][ T7070] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 67.559440][ T7070] ? mark_held_locks+0x9f/0xe0 [ 67.564197][ T7070] ? mmu_topup_memory_caches+0x325/0x460 [ 67.569860][ T7070] direct_page_fault+0x27d/0x1d70 [ 67.574880][ T7070] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 67.580069][ T7070] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 67.586818][ T7070] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 67.591836][ T7070] kvm_mmu_page_fault+0x187/0x15d0 [ 67.596940][ T7070] ? find_held_lock+0x2d/0x110 [ 67.601764][ T7070] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 67.607836][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.613398][ T7070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.619386][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.624979][ T7070] ? handle_ept_violation+0x206/0x550 [ 67.630370][ T7070] ? vmx_inject_irq+0x5b0/0x5b0 [ 67.635479][ T7070] vmx_handle_exit+0x2b8/0x1700 [ 67.640330][ T7070] vcpu_enter_guest+0xfea/0x59d0 [ 67.645270][ T7070] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 67.651674][ T7070] ? kvm_vcpu_kick+0x162/0x2a0 [ 67.656458][ T7070] ? __apic_accept_irq+0x423/0xb80 [ 67.661560][ T7070] ? kvm_lapic_enable_pv_eoi+0x160/0x160 [ 67.667177][ T7070] ? kvm_check_async_pf_completion+0x2a4/0x400 [ 67.673329][ T7070] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 67.679046][ T7070] kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 67.684587][ T7070] kvm_vcpu_ioctl+0x493/0xe60 [ 67.689247][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.697604][ T7070] ? ioctl_file_clone+0x180/0x180 [ 67.702625][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.708158][ T7070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.714138][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.720545][ T7070] ksys_ioctl+0x11a/0x180 [ 67.724864][ T7070] __x64_sys_ioctl+0x6f/0xb0 [ 67.729442][ T7070] ? lockdep_hardirqs_on+0x463/0x620 [ 67.734744][ T7070] do_syscall_64+0xf6/0x7d0 [ 67.739233][ T7070] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.745121][ T7070] RIP: 0033:0x440269 [ 67.749000][ T7070] 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 [ 67.768651][ T7070] RSP: 002b:00007ffed11b57f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.777053][ T7070] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 [ 67.785015][ T7070] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 67.792975][ T7070] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.800933][ T7070] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401af0 [ 67.808918][ T7070] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 67.816884][ T7070] [ 67.819240][ T7070] Allocated by task 7070: [ 67.823564][ T7070] save_stack+0x1b/0x40 [ 67.827716][ T7070] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.833344][ T7070] kvmalloc_node+0x61/0xf0 [ 67.837763][ T7070] kvm_set_memslot+0x115/0x1530 [ 67.842598][ T7070] __kvm_set_memory_region+0xcf7/0x1320 [ 67.848132][ T7070] __x86_set_memory_region+0x2a3/0x5a0 [ 67.853581][ T7070] vmx_create_vcpu+0x2107/0x2b40 [ 67.858509][ T7070] kvm_arch_vcpu_create+0x6ef/0xb80 [ 67.863708][ T7070] kvm_vm_ioctl+0x1614/0x2400 [ 67.868364][ T7070] ksys_ioctl+0x11a/0x180 [ 67.872689][ T7070] __x64_sys_ioctl+0x6f/0xb0 [ 67.877288][ T7070] do_syscall_64+0xf6/0x7d0 [ 67.881784][ T7070] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.887659][ T7070] [ 67.889999][ T7070] Freed by task 9: [ 67.893708][ T7070] save_stack+0x1b/0x40 [ 67.897842][ T7070] __kasan_slab_free+0xf7/0x140 [ 67.902678][ T7070] kfree+0x109/0x2b0 [ 67.906561][ T7070] __sk_destruct+0x5ad/0x7c0 [ 67.911173][ T7070] sk_destruct+0xc6/0x100 [ 67.915490][ T7070] __sk_free+0xef/0x3d0 [ 67.919627][ T7070] sk_free+0x78/0xa0 [ 67.923502][ T7070] deferred_put_nlk_sk+0x151/0x2e0 [ 67.928612][ T7070] rcu_core+0x59f/0x1370 [ 67.932842][ T7070] __do_softirq+0x26c/0x9f7 [ 67.937337][ T7070] [ 67.939664][ T7070] The buggy address belongs to the object at ffff88809e204000 [ 67.939664][ T7070] which belongs to the cache kmalloc-2k of size 2048 [ 67.953709][ T7070] The buggy address is located 1128 bytes inside of [ 67.953709][ T7070] 2048-byte region [ffff88809e204000, ffff88809e204800) [ 67.971057][ T7070] The buggy address belongs to the page: [ 67.976690][ T7070] page:ffffea0002788100 refcount:1 mapcount:0 mapping:000000005ea94ca3 index:0x0 [ 67.985786][ T7070] flags: 0xfffe0000000200(slab) [ 67.990630][ T7070] raw: 00fffe0000000200 ffffea00027aff88 ffffea000278a488 ffff8880aa000e00 [ 67.999201][ T7070] raw: 0000000000000000 ffff88809e204000 0000000100000001 0000000000000000 [ 68.007768][ T7070] page dumped because: kasan: bad access detected [ 68.014161][ T7070] [ 68.016475][ T7070] Memory state around the buggy address: [ 68.022173][ T7070] ffff88809e204300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.030219][ T7070] ffff88809e204380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.038278][ T7070] >ffff88809e204400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 68.046321][ T7070] ^ [ 68.053760][ T7070] ffff88809e204480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.061807][ T7070] ffff88809e204500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.069848][ T7070] ================================================================== [ 68.078154][ T7070] Disabling lock debugging due to kernel taint [ 68.084981][ T7070] Kernel panic - not syncing: panic_on_warn set ... [ 68.091596][ T7070] CPU: 0 PID: 7070 Comm: syz-executor262 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 [ 68.102891][ T7070] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.112960][ T7070] Call Trace: [ 68.116260][ T7070] dump_stack+0x188/0x20d [ 68.120606][ T7070] panic+0x2e3/0x75c [ 68.124517][ T7070] ? add_taint.cold+0x16/0x16 [ 68.129194][ T7070] ? preempt_schedule_common+0x5e/0xc0 [ 68.134641][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.140266][ T7070] ? preempt_schedule_thunk+0x16/0x18 [ 68.145631][ T7070] ? trace_hardirqs_on+0x55/0x220 [ 68.150655][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.156289][ T7070] end_report+0x4d/0x53 [ 68.160433][ T7070] __kasan_report.cold+0xd/0x4d [ 68.165267][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.170891][ T7070] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.176520][ T7070] kasan_report+0x33/0x50 [ 68.180860][ T7070] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 68.186412][ T7070] try_async_pf+0x12b/0xac0 [ 68.190910][ T7070] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 68.195807][ T7070] ? mark_held_locks+0x9f/0xe0 [ 68.200562][ T7070] ? mmu_topup_memory_caches+0x325/0x460 [ 68.206198][ T7070] direct_page_fault+0x27d/0x1d70 [ 68.211209][ T7070] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 68.216403][ T7070] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 68.223148][ T7070] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 68.228166][ T7070] kvm_mmu_page_fault+0x187/0x15d0 [ 68.233453][ T7070] ? find_held_lock+0x2d/0x110 [ 68.240485][ T7070] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 68.246574][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.252115][ T7070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.258089][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.263895][ T7070] ? handle_ept_violation+0x206/0x550 [ 68.269257][ T7070] ? vmx_inject_irq+0x5b0/0x5b0 [ 68.274103][ T7070] vmx_handle_exit+0x2b8/0x1700 [ 68.278947][ T7070] vcpu_enter_guest+0xfea/0x59d0 [ 68.283873][ T7070] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 68.290282][ T7070] ? kvm_vcpu_kick+0x162/0x2a0 [ 68.295030][ T7070] ? __apic_accept_irq+0x423/0xb80 [ 68.300398][ T7070] ? kvm_lapic_enable_pv_eoi+0x160/0x160 [ 68.306013][ T7070] ? kvm_check_async_pf_completion+0x2a4/0x400 [ 68.312173][ T7070] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 68.317880][ T7070] kvm_arch_vcpu_ioctl_run+0x3fb/0x16e0 [ 68.323417][ T7070] kvm_vcpu_ioctl+0x493/0xe60 [ 68.328078][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 68.334479][ T7070] ? ioctl_file_clone+0x180/0x180 [ 68.339521][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.345072][ T7070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.351057][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 68.357468][ T7070] ksys_ioctl+0x11a/0x180 [ 68.361794][ T7070] __x64_sys_ioctl+0x6f/0xb0 [ 68.366421][ T7070] ? lockdep_hardirqs_on+0x463/0x620 [ 68.371693][ T7070] do_syscall_64+0xf6/0x7d0 [ 68.376194][ T7070] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 68.382087][ T7070] RIP: 0033:0x440269 [ 68.385978][ T7070] 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 [ 68.405569][ T7070] RSP: 002b:00007ffed11b57f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.414014][ T7070] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 [ 68.421979][ T7070] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 68.430029][ T7070] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 68.438000][ T7070] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401af0 [ 68.446405][ T7070] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 68.455721][ T7070] Kernel Offset: disabled [ 68.460158][ T7070] Rebooting in 86400 seconds..