[ 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 '10.128.0.134' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 58.512054][ T7167] 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. [ 58.559783][ T7172] ================================================================== [ 58.567997][ T7172] BUG: KASAN: slab-out-of-bounds in __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 58.576717][ T7172] Read of size 8 at addr ffff8880a03bc468 by task syz-executor886/7172 [ 58.584975][ T7172] [ 58.587316][ T7172] CPU: 1 PID: 7172 Comm: syz-executor886 Not tainted 5.6.0-syzkaller #0 [ 58.595639][ T7172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.605706][ T7172] Call Trace: [ 58.609003][ T7172] dump_stack+0x188/0x20d [ 58.613355][ T7172] print_address_description.constprop.0.cold+0xd3/0x315 [ 58.623342][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 58.629334][ T7172] __kasan_report.cold+0x35/0x4d [ 58.634295][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 58.640295][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 58.646286][ T7172] kasan_report+0x33/0x50 [ 58.650632][ T7172] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 58.656467][ T7172] ? __kvm_write_guest_page+0x170/0x170 [ 58.662053][ T7172] kvm_lapic_set_vapic_addr+0x88/0x180 [ 58.667549][ T7172] kvm_arch_vcpu_ioctl+0xf0d/0x2c20 [ 58.672770][ T7172] ? kvm_arch_vcpu_put+0x530/0x530 [ 58.677928][ T7172] ? lock_acquire+0x1f2/0x8f0 [ 58.682620][ T7172] ? kvm_vcpu_ioctl+0x175/0xe60 [ 58.687487][ T7172] ? lock_release+0x800/0x800 [ 58.692289][ T7172] ? find_held_lock+0x2d/0x110 [ 58.697078][ T7172] ? __mutex_lock+0x458/0x13c0 [ 58.701853][ T7172] ? kfree+0x1eb/0x2b0 [ 58.705931][ T7172] ? kvm_vcpu_ioctl+0x175/0xe60 [ 58.710800][ T7172] ? mutex_trylock+0x2c0/0x2c0 [ 58.715593][ T7172] ? tomoyo_execute_permission+0x470/0x470 [ 58.721403][ T7172] kvm_vcpu_ioctl+0x866/0xe60 [ 58.726083][ T7172] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 58.732498][ T7172] ? ioctl_file_clone+0x180/0x180 [ 58.737525][ T7172] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.743054][ T7172] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.749014][ T7172] ? down_read_nested+0x420/0x420 [ 58.754045][ T7172] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 58.760441][ T7172] ksys_ioctl+0x11a/0x180 [ 58.764759][ T7172] __x64_sys_ioctl+0x6f/0xb0 [ 58.769331][ T7172] ? lockdep_hardirqs_on+0x463/0x620 [ 58.774600][ T7172] do_syscall_64+0xf6/0x7d0 [ 58.779110][ T7172] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.784983][ T7172] RIP: 0033:0x4412c9 [ 58.788883][ T7172] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 58.808480][ T7172] RSP: 002b:00007fff2be84058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.816879][ T7172] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 58.824841][ T7172] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 58.832793][ T7172] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 58.840748][ T7172] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402040 [ 58.849072][ T7172] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 58.857045][ T7172] [ 58.859374][ T7172] Allocated by task 7172: [ 58.863693][ T7172] save_stack+0x1b/0x40 [ 58.867832][ T7172] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 58.873575][ T7172] kvmalloc_node+0x61/0xf0 [ 58.878001][ T7172] kvm_set_memslot+0x115/0x1530 [ 58.882855][ T7172] __kvm_set_memory_region+0xcf7/0x1320 [ 58.888397][ T7172] __x86_set_memory_region+0x2a3/0x5a0 [ 58.893845][ T7172] vmx_create_vcpu+0x2107/0x2b40 [ 58.898771][ T7172] kvm_arch_vcpu_create+0x6ef/0xb80 [ 58.903958][ T7172] kvm_vm_ioctl+0x15f7/0x23e0 [ 58.908636][ T7172] ksys_ioctl+0x11a/0x180 [ 58.912956][ T7172] __x64_sys_ioctl+0x6f/0xb0 [ 58.917614][ T7172] do_syscall_64+0xf6/0x7d0 [ 58.922121][ T7172] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.928000][ T7172] [ 58.930318][ T7172] Freed by task 0: [ 58.934020][ T7172] (stack is not available) [ 58.938413][ T7172] [ 58.940732][ T7172] The buggy address belongs to the object at ffff8880a03bc000 [ 58.940732][ T7172] which belongs to the cache kmalloc-2k of size 2048 [ 58.954996][ T7172] The buggy address is located 1128 bytes inside of [ 58.954996][ T7172] 2048-byte region [ffff8880a03bc000, ffff8880a03bc800) [ 58.968424][ T7172] The buggy address belongs to the page: [ 58.974049][ T7172] page:ffffea000280ef00 refcount:1 mapcount:0 mapping:00000000f1b763c8 index:0x0 [ 58.983138][ T7172] flags: 0xfffe0000000200(slab) [ 58.987974][ T7172] raw: 00fffe0000000200 ffffea000246a748 ffffea00024d6508 ffff8880aa000e00 [ 58.996576][ T7172] raw: 0000000000000000 ffff8880a03bc000 0000000100000001 0000000000000000 [ 59.006100][ T7172] page dumped because: kasan: bad access detected [ 59.012623][ T7172] [ 59.014934][ T7172] Memory state around the buggy address: [ 59.020549][ T7172] ffff8880a03bc300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.029127][ T7172] ffff8880a03bc380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.037187][ T7172] >ffff8880a03bc400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 59.045228][ T7172] ^ [ 59.052671][ T7172] ffff8880a03bc480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.060838][ T7172] ffff8880a03bc500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.068905][ T7172] ================================================================== [ 59.076952][ T7172] Disabling lock debugging due to kernel taint [ 59.100181][ T7172] Kernel panic - not syncing: panic_on_warn set ... [ 59.106812][ T7172] CPU: 0 PID: 7172 Comm: syz-executor886 Tainted: G B 5.6.0-syzkaller #0 [ 59.116520][ T7172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.126708][ T7172] Call Trace: [ 59.129985][ T7172] dump_stack+0x188/0x20d [ 59.134298][ T7172] panic+0x2e3/0x75c [ 59.138175][ T7172] ? add_taint.cold+0x16/0x16 [ 59.142832][ T7172] ? preempt_schedule_common+0x5e/0xc0 [ 59.148268][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 59.154224][ T7172] ? preempt_schedule_thunk+0x16/0x18 [ 59.159578][ T7172] ? trace_hardirqs_on+0x55/0x220 [ 59.164599][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 59.170552][ T7172] end_report+0x4d/0x53 [ 59.174685][ T7172] __kasan_report.cold+0xd/0x4d [ 59.179508][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 59.185464][ T7172] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 59.191418][ T7172] kasan_report+0x33/0x50 [ 59.195737][ T7172] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 59.201529][ T7172] ? __kvm_write_guest_page+0x170/0x170 [ 59.207052][ T7172] kvm_lapic_set_vapic_addr+0x88/0x180 [ 59.212485][ T7172] kvm_arch_vcpu_ioctl+0xf0d/0x2c20 [ 59.217662][ T7172] ? kvm_arch_vcpu_put+0x530/0x530 [ 59.222749][ T7172] ? lock_acquire+0x1f2/0x8f0 [ 59.227401][ T7172] ? kvm_vcpu_ioctl+0x175/0xe60 [ 59.232238][ T7172] ? lock_release+0x800/0x800 [ 59.236890][ T7172] ? find_held_lock+0x2d/0x110 [ 59.241632][ T7172] ? __mutex_lock+0x458/0x13c0 [ 59.246545][ T7172] ? kfree+0x1eb/0x2b0 [ 59.250588][ T7172] ? kvm_vcpu_ioctl+0x175/0xe60 [ 59.255414][ T7172] ? mutex_trylock+0x2c0/0x2c0 [ 59.261193][ T7172] ? tomoyo_execute_permission+0x470/0x470 [ 59.266977][ T7172] kvm_vcpu_ioctl+0x866/0xe60 [ 59.272585][ T7172] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.278973][ T7172] ? ioctl_file_clone+0x180/0x180 [ 59.283976][ T7172] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.289680][ T7172] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.295649][ T7172] ? down_read_nested+0x420/0x420 [ 59.300681][ T7172] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.307076][ T7172] ksys_ioctl+0x11a/0x180 [ 59.311421][ T7172] __x64_sys_ioctl+0x6f/0xb0 [ 59.316080][ T7172] ? lockdep_hardirqs_on+0x463/0x620 [ 59.321446][ T7172] do_syscall_64+0xf6/0x7d0 [ 59.325954][ T7172] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.331828][ T7172] RIP: 0033:0x4412c9 [ 59.335700][ T7172] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.355281][ T7172] RSP: 002b:00007fff2be84058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 59.364105][ T7172] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 59.372054][ T7172] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 59.380004][ T7172] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 59.387971][ T7172] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402040 [ 59.395995][ T7172] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 59.405364][ T7172] Kernel Offset: disabled [ 59.409691][ T7172] Rebooting in 86400 seconds..