[ 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 '10.128.0.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.070678][ 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. [ 70.110820][ T7070] ================================================================== [ 70.119106][ T7070] BUG: KASAN: slab-out-of-bounds in __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.127789][ T7070] Read of size 8 at addr ffff8880949a9468 by task syz-executor575/7070 [ 70.136010][ T7070] [ 70.138774][ T7070] CPU: 0 PID: 7070 Comm: syz-executor575 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 70.148630][ T7070] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.158669][ T7070] Call Trace: [ 70.161942][ T7070] dump_stack+0x188/0x20d [ 70.166254][ T7070] print_address_description.constprop.0.cold+0xd3/0x315 [ 70.173261][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.179220][ T7070] __kasan_report.cold+0x35/0x4d [ 70.184146][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.190203][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.196172][ T7070] kasan_report+0x33/0x50 [ 70.200515][ T7070] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.206832][ T7070] ? __kvm_write_guest_page+0x170/0x170 [ 70.212373][ T7070] kvm_lapic_set_vapic_addr+0x88/0x180 [ 70.217823][ T7070] kvm_arch_vcpu_ioctl+0xf0d/0x2c00 [ 70.223011][ T7070] ? kvm_arch_vcpu_put+0x530/0x530 [ 70.228201][ T7070] ? lock_acquire+0x1f2/0x8f0 [ 70.232868][ T7070] ? kvm_vcpu_ioctl+0x175/0xe60 [ 70.237699][ T7070] ? lock_release+0x800/0x800 [ 70.242352][ T7070] ? find_held_lock+0x2d/0x110 [ 70.247115][ T7070] ? __mutex_lock+0x458/0x13c0 [ 70.251860][ T7070] ? kfree+0x1eb/0x2b0 [ 70.255906][ T7070] ? kvm_vcpu_ioctl+0x175/0xe60 [ 70.260738][ T7070] ? mutex_trylock+0x2c0/0x2c0 [ 70.265484][ T7070] ? tomoyo_execute_permission+0x470/0x470 [ 70.271427][ T7070] kvm_vcpu_ioctl+0x866/0xe60 [ 70.276441][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 70.282996][ T7070] ? ioctl_file_clone+0x180/0x180 [ 70.288118][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.293667][ T7070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.299748][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 70.306156][ T7070] ksys_ioctl+0x11a/0x180 [ 70.310471][ T7070] __x64_sys_ioctl+0x6f/0xb0 [ 70.315038][ T7070] ? lockdep_hardirqs_on+0x463/0x620 [ 70.320311][ T7070] do_syscall_64+0xf6/0x7d0 [ 70.324798][ T7070] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 70.330686][ T7070] RIP: 0033:0x440219 [ 70.334570][ 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 [ 70.355052][ T7070] RSP: 002b:00007ffeaa65d388 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 70.363454][ T7070] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 70.371606][ T7070] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 70.379563][ T7070] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 70.387514][ T7070] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401aa0 [ 70.395480][ T7070] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 70.403491][ T7070] [ 70.405860][ T7070] Allocated by task 7070: [ 70.410312][ T7070] save_stack+0x1b/0x40 [ 70.414498][ T7070] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 70.420229][ T7070] kvmalloc_node+0x61/0xf0 [ 70.424632][ T7070] kvm_set_memslot+0x115/0x1530 [ 70.429482][ T7070] __kvm_set_memory_region+0xcf7/0x1320 [ 70.435050][ T7070] __x86_set_memory_region+0x2a3/0x5a0 [ 70.440512][ T7070] vmx_create_vcpu+0x2107/0x2b40 [ 70.445444][ T7070] kvm_arch_vcpu_create+0x6ef/0xb80 [ 70.450637][ T7070] kvm_vm_ioctl+0x1614/0x2400 [ 70.455440][ T7070] ksys_ioctl+0x11a/0x180 [ 70.459891][ T7070] __x64_sys_ioctl+0x6f/0xb0 [ 70.464581][ T7070] do_syscall_64+0xf6/0x7d0 [ 70.469465][ T7070] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 70.475344][ T7070] [ 70.477667][ T7070] Freed by task 3213: [ 70.481648][ T7070] save_stack+0x1b/0x40 [ 70.485843][ T7070] __kasan_slab_free+0xf7/0x140 [ 70.491013][ T7070] kfree+0x109/0x2b0 [ 70.495053][ T7070] process_one_work+0x965/0x16a0 [ 70.500019][ T7070] worker_thread+0x96/0xe20 [ 70.504693][ T7070] kthread+0x388/0x470 [ 70.508965][ T7070] ret_from_fork+0x24/0x30 [ 70.513360][ T7070] [ 70.515691][ T7070] The buggy address belongs to the object at ffff8880949a9000 [ 70.515691][ T7070] which belongs to the cache kmalloc-2k of size 2048 [ 70.529850][ T7070] The buggy address is located 1128 bytes inside of [ 70.529850][ T7070] 2048-byte region [ffff8880949a9000, ffff8880949a9800) [ 70.543400][ T7070] The buggy address belongs to the page: [ 70.549036][ T7070] page:ffffea0002526a40 refcount:1 mapcount:0 mapping:000000001ae0e3c7 index:0x0 [ 70.558117][ T7070] flags: 0xfffe0000000200(slab) [ 70.562965][ T7070] raw: 00fffe0000000200 ffffea00029a19c8 ffffea0002661848 ffff8880aa000e00 [ 70.571545][ T7070] raw: 0000000000000000 ffff8880949a9000 0000000100000001 0000000000000000 [ 70.580203][ T7070] page dumped because: kasan: bad access detected [ 70.586651][ T7070] [ 70.588969][ T7070] Memory state around the buggy address: [ 70.594624][ T7070] ffff8880949a9300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.602678][ T7070] ffff8880949a9380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.610720][ T7070] >ffff8880949a9400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 70.618755][ T7070] ^ [ 70.626709][ T7070] ffff8880949a9480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 70.634766][ T7070] ffff8880949a9500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 70.642827][ T7070] ================================================================== [ 70.650882][ T7070] Disabling lock debugging due to kernel taint [ 70.658288][ T7070] Kernel panic - not syncing: panic_on_warn set ... [ 70.664904][ T7070] CPU: 1 PID: 7070 Comm: syz-executor575 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 [ 70.676189][ T7070] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.686364][ T7070] Call Trace: [ 70.689688][ T7070] dump_stack+0x188/0x20d [ 70.694011][ T7070] panic+0x2e3/0x75c [ 70.697918][ T7070] ? add_taint.cold+0x16/0x16 [ 70.702592][ T7070] ? preempt_schedule_common+0x5e/0xc0 [ 70.708036][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.713995][ T7070] ? preempt_schedule_thunk+0x16/0x18 [ 70.719379][ T7070] ? trace_hardirqs_on+0x55/0x220 [ 70.724469][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.730553][ T7070] end_report+0x4d/0x53 [ 70.734747][ T7070] __kasan_report.cold+0xd/0x4d [ 70.739580][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.745533][ T7070] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.751489][ T7070] kasan_report+0x33/0x50 [ 70.755796][ T7070] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 70.761602][ T7070] ? __kvm_write_guest_page+0x170/0x170 [ 70.767125][ T7070] kvm_lapic_set_vapic_addr+0x88/0x180 [ 70.773228][ T7070] kvm_arch_vcpu_ioctl+0xf0d/0x2c00 [ 70.778421][ T7070] ? kvm_arch_vcpu_put+0x530/0x530 [ 70.783541][ T7070] ? lock_acquire+0x1f2/0x8f0 [ 70.788276][ T7070] ? kvm_vcpu_ioctl+0x175/0xe60 [ 70.793255][ T7070] ? lock_release+0x800/0x800 [ 70.798099][ T7070] ? find_held_lock+0x2d/0x110 [ 70.802866][ T7070] ? __mutex_lock+0x458/0x13c0 [ 70.807609][ T7070] ? kfree+0x1eb/0x2b0 [ 70.811747][ T7070] ? kvm_vcpu_ioctl+0x175/0xe60 [ 70.816592][ T7070] ? mutex_trylock+0x2c0/0x2c0 [ 70.821338][ T7070] ? tomoyo_execute_permission+0x470/0x470 [ 70.827149][ T7070] kvm_vcpu_ioctl+0x866/0xe60 [ 70.831818][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 70.838335][ T7070] ? ioctl_file_clone+0x180/0x180 [ 70.843374][ T7070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.848931][ T7070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.854909][ T7070] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 70.861327][ T7070] ksys_ioctl+0x11a/0x180 [ 70.865665][ T7070] __x64_sys_ioctl+0x6f/0xb0 [ 70.870247][ T7070] ? lockdep_hardirqs_on+0x463/0x620 [ 70.875812][ T7070] do_syscall_64+0xf6/0x7d0 [ 70.880328][ T7070] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 70.886310][ T7070] RIP: 0033:0x440219 [ 70.890208][ 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 [ 70.910476][ T7070] RSP: 002b:00007ffeaa65d388 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 70.918881][ T7070] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 70.926848][ T7070] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 70.934801][ T7070] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 70.942748][ T7070] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401aa0 [ 70.951080][ T7070] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 70.960778][ T7070] Kernel Offset: disabled [ 70.965113][ T7070] Rebooting in 86400 seconds..