[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.202568][ T7081] 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. [ 69.241949][ T7081] ================================================================== [ 69.250230][ T7081] BUG: KASAN: slab-out-of-bounds in __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.258873][ T7081] Read of size 8 at addr ffff8880a6919468 by task syz-executor754/7081 [ 69.267074][ T7081] [ 69.269382][ T7081] CPU: 1 PID: 7081 Comm: syz-executor754 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 69.279246][ T7081] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.289274][ T7081] Call Trace: [ 69.292537][ T7081] dump_stack+0x188/0x20d [ 69.296842][ T7081] print_address_description.constprop.0.cold+0xd3/0x315 [ 69.303837][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.309794][ T7081] __kasan_report.cold+0x35/0x4d [ 69.314706][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.320660][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.326610][ T7081] kasan_report+0x33/0x50 [ 69.330967][ T7081] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.336752][ T7081] ? __kvm_write_guest_page+0x170/0x170 [ 69.342281][ T7081] kvm_lapic_set_vapic_addr+0x88/0x180 [ 69.347715][ T7081] kvm_arch_vcpu_ioctl+0xf0d/0x2c00 [ 69.352890][ T7081] ? kvm_arch_vcpu_put+0x530/0x530 [ 69.357979][ T7081] ? lock_acquire+0x1f2/0x8f0 [ 69.362631][ T7081] ? kvm_vcpu_ioctl+0x175/0xe60 [ 69.367507][ T7081] ? lock_release+0x800/0x800 [ 69.372157][ T7081] ? find_held_lock+0x2d/0x110 [ 69.376905][ T7081] ? __mutex_lock+0x458/0x13c0 [ 69.381674][ T7081] ? kfree+0x1eb/0x2b0 [ 69.385715][ T7081] ? kvm_vcpu_ioctl+0x175/0xe60 [ 69.390543][ T7081] ? mutex_trylock+0x2c0/0x2c0 [ 69.395313][ T7081] ? tomoyo_execute_permission+0x470/0x470 [ 69.401100][ T7081] ? __fget_files+0x30d/0x500 [ 69.405752][ T7081] kvm_vcpu_ioctl+0x866/0xe60 [ 69.410442][ T7081] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 69.416830][ T7081] ? ioctl_file_clone+0x180/0x180 [ 69.421840][ T7081] ? __fget_files+0x32f/0x500 [ 69.426493][ T7081] ? do_dup2+0x520/0x520 [ 69.430711][ T7081] ? __x64_sys_futex+0x376/0x4f0 [ 69.435621][ T7081] ? __x64_sys_futex+0x380/0x4f0 [ 69.440595][ T7081] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 69.446995][ T7081] ksys_ioctl+0x11a/0x180 [ 69.451297][ T7081] __x64_sys_ioctl+0x6f/0xb0 [ 69.455857][ T7081] ? lockdep_hardirqs_on+0x463/0x620 [ 69.461115][ T7081] do_syscall_64+0xf6/0x7d0 [ 69.465593][ T7081] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 69.471473][ T7081] RIP: 0033:0x4458b9 [ 69.475341][ T7081] Code: e8 bc b7 02 00 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 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.494916][ T7081] RSP: 002b:00007f88a031cdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 69.503314][ T7081] RAX: ffffffffffffffda RBX: 00000000006dac48 RCX: 00000000004458b9 [ 69.511392][ T7081] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 69.519338][ T7081] RBP: 00000000006dac40 R08: 0000000000000000 R09: 0000000000000000 [ 69.527288][ T7081] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac4c [ 69.535235][ T7081] R13: 00007ffea1d76e4f R14: 00007f88a031d9c0 R15: 20c49ba5e353f7cf [ 69.543191][ T7081] [ 69.545491][ T7081] Allocated by task 7081: [ 69.549808][ T7081] save_stack+0x1b/0x40 [ 69.553935][ T7081] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 69.559541][ T7081] kvmalloc_node+0x61/0xf0 [ 69.563928][ T7081] kvm_set_memslot+0x115/0x1530 [ 69.568761][ T7081] __kvm_set_memory_region+0xcf7/0x1320 [ 69.574280][ T7081] __x86_set_memory_region+0x2a3/0x5a0 [ 69.579710][ T7081] vmx_create_vcpu+0x2107/0x2b40 [ 69.584619][ T7081] kvm_arch_vcpu_create+0x6ef/0xb80 [ 69.589790][ T7081] kvm_vm_ioctl+0x1614/0x2400 [ 69.594451][ T7081] ksys_ioctl+0x11a/0x180 [ 69.598760][ T7081] __x64_sys_ioctl+0x6f/0xb0 [ 69.603337][ T7081] do_syscall_64+0xf6/0x7d0 [ 69.607829][ T7081] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 69.613691][ T7081] [ 69.615991][ T7081] Freed by task 0: [ 69.619680][ T7081] (stack is not available) [ 69.624063][ T7081] [ 69.626369][ T7081] The buggy address belongs to the object at ffff8880a6919000 [ 69.626369][ T7081] which belongs to the cache kmalloc-2k of size 2048 [ 69.640392][ T7081] The buggy address is located 1128 bytes inside of [ 69.640392][ T7081] 2048-byte region [ffff8880a6919000, ffff8880a6919800) [ 69.653805][ T7081] The buggy address belongs to the page: [ 69.659430][ T7081] page:ffffea00029a4640 refcount:1 mapcount:0 mapping:00000000fd8e7e36 index:0x0 [ 69.668521][ T7081] flags: 0xfffe0000000200(slab) [ 69.673348][ T7081] raw: 00fffe0000000200 ffffea0002696888 ffffea0002841948 ffff8880aa000e00 [ 69.681914][ T7081] raw: 0000000000000000 ffff8880a6919000 0000000100000001 0000000000000000 [ 69.690506][ T7081] page dumped because: kasan: bad access detected [ 69.696888][ T7081] [ 69.699188][ T7081] Memory state around the buggy address: [ 69.704829][ T7081] ffff8880a6919300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.712866][ T7081] ffff8880a6919380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.720899][ T7081] >ffff8880a6919400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 69.728934][ T7081] ^ [ 69.736360][ T7081] ffff8880a6919480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.744433][ T7081] ffff8880a6919500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.752461][ T7081] ================================================================== [ 69.760489][ T7081] Disabling lock debugging due to kernel taint [ 69.768386][ T7081] Kernel panic - not syncing: panic_on_warn set ... [ 69.774981][ T7081] CPU: 0 PID: 7081 Comm: syz-executor754 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 [ 69.786253][ T7081] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.796292][ T7081] Call Trace: [ 69.799604][ T7081] dump_stack+0x188/0x20d [ 69.803909][ T7081] panic+0x2e3/0x75c [ 69.807777][ T7081] ? add_taint.cold+0x16/0x16 [ 69.812445][ T7081] ? preempt_schedule_common+0x5e/0xc0 [ 69.817876][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.823829][ T7081] ? preempt_schedule_thunk+0x16/0x18 [ 69.829173][ T7081] ? trace_hardirqs_on+0x55/0x220 [ 69.834177][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.840128][ T7081] end_report+0x4d/0x53 [ 69.844255][ T7081] __kasan_report.cold+0xd/0x4d [ 69.849081][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.855084][ T7081] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.861038][ T7081] kasan_report+0x33/0x50 [ 69.865384][ T7081] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 69.871165][ T7081] ? __kvm_write_guest_page+0x170/0x170 [ 69.876685][ T7081] kvm_lapic_set_vapic_addr+0x88/0x180 [ 69.882127][ T7081] kvm_arch_vcpu_ioctl+0xf0d/0x2c00 [ 69.887303][ T7081] ? kvm_arch_vcpu_put+0x530/0x530 [ 69.892392][ T7081] ? lock_acquire+0x1f2/0x8f0 [ 69.897040][ T7081] ? kvm_vcpu_ioctl+0x175/0xe60 [ 69.901862][ T7081] ? lock_release+0x800/0x800 [ 69.906519][ T7081] ? find_held_lock+0x2d/0x110 [ 69.911270][ T7081] ? __mutex_lock+0x458/0x13c0 [ 69.916046][ T7081] ? kfree+0x1eb/0x2b0 [ 69.920099][ T7081] ? kvm_vcpu_ioctl+0x175/0xe60 [ 69.924922][ T7081] ? mutex_trylock+0x2c0/0x2c0 [ 69.929696][ T7081] ? tomoyo_execute_permission+0x470/0x470 [ 69.931623][ T7088] debugfs: Directory 'vcpu0' with parent '7081-4' already present! [ 69.935488][ T7081] ? __fget_files+0x30d/0x500 [ 69.947995][ T7081] kvm_vcpu_ioctl+0x866/0xe60 [ 69.952670][ T7081] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 69.959076][ T7081] ? ioctl_file_clone+0x180/0x180 [ 69.964097][ T7081] ? __fget_files+0x32f/0x500 [ 69.968770][ T7081] ? do_dup2+0x520/0x520 [ 69.973028][ T7081] ? __x64_sys_futex+0x376/0x4f0 [ 69.977959][ T7081] ? __x64_sys_futex+0x380/0x4f0 [ 69.982892][ T7081] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 69.989279][ T7081] ksys_ioctl+0x11a/0x180 [ 69.993580][ T7081] __x64_sys_ioctl+0x6f/0xb0 [ 69.998143][ T7081] ? lockdep_hardirqs_on+0x463/0x620 [ 70.003399][ T7081] do_syscall_64+0xf6/0x7d0 [ 70.007930][ T7081] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 70.013824][ T7081] RIP: 0033:0x4458b9 [ 70.017707][ T7081] Code: e8 bc b7 02 00 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 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 70.037291][ T7081] RSP: 002b:00007f88a031cdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 70.045792][ T7081] RAX: ffffffffffffffda RBX: 00000000006dac48 RCX: 00000000004458b9 [ 70.053763][ T7081] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 70.061702][ T7081] RBP: 00000000006dac40 R08: 0000000000000000 R09: 0000000000000000 [ 70.069649][ T7081] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac4c [ 70.077603][ T7081] R13: 00007ffea1d76e4f R14: 00007f88a031d9c0 R15: 20c49ba5e353f7cf [ 70.086847][ T7081] Kernel Offset: disabled [ 70.091203][ T7081] Rebooting in 86400 seconds..