Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 56.090388][ T7099] 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. [ 56.126530][ T7099] ================================================================== [ 56.134745][ T7099] BUG: KASAN: slab-out-of-bounds in __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.143524][ T7099] Read of size 8 at addr ffff8880a70b5468 by task syz-executor012/7099 [ 56.151736][ T7099] [ 56.154051][ T7099] CPU: 1 PID: 7099 Comm: syz-executor012 Not tainted 5.7.0-rc1-syzkaller #0 [ 56.162704][ T7099] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.172748][ T7099] Call Trace: [ 56.176028][ T7099] dump_stack+0x188/0x20d [ 56.180382][ T7099] print_address_description.constprop.0.cold+0xd3/0x315 [ 56.187519][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.193480][ T7099] __kasan_report.cold+0x35/0x4d [ 56.198396][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.204356][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.210320][ T7099] kasan_report+0x33/0x50 [ 56.214630][ T7099] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.220418][ T7099] ? __kvm_write_guest_page+0x170/0x170 [ 56.226123][ T7099] kvm_lapic_set_vapic_addr+0x88/0x180 [ 56.231562][ T7099] kvm_arch_vcpu_ioctl+0xf0d/0x2c20 [ 56.236739][ T7099] ? kvm_arch_vcpu_put+0x530/0x530 [ 56.241830][ T7099] ? lock_acquire+0x1f2/0x8f0 [ 56.246482][ T7099] ? kvm_vcpu_ioctl+0x175/0xe60 [ 56.251313][ T7099] ? lock_release+0x800/0x800 [ 56.255969][ T7099] ? find_held_lock+0x2d/0x110 [ 56.260716][ T7099] ? __mutex_lock+0x458/0x13c0 [ 56.265455][ T7099] ? find_held_lock+0x2d/0x110 [ 56.270262][ T7099] ? kvm_vcpu_ioctl+0x175/0xe60 [ 56.275089][ T7099] ? tomoyo_path_number_perm+0x1ee/0x4d0 [ 56.280700][ T7099] ? mutex_trylock+0x2c0/0x2c0 [ 56.285454][ T7099] ? lock_downgrade+0x840/0x840 [ 56.290280][ T7099] ? quarantine_put+0x119/0x1c0 [ 56.295110][ T7099] ? kfree+0x1eb/0x2b0 [ 56.299156][ T7099] ? tomoyo_path_number_perm+0x411/0x4d0 [ 56.304861][ T7099] ? lockdep_hardirqs_on+0x463/0x620 [ 56.310123][ T7099] ? tomoyo_path_number_perm+0x238/0x4d0 [ 56.315885][ T7099] kvm_vcpu_ioctl+0x866/0xe60 [ 56.320644][ T7099] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 56.327097][ T7099] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 56.332984][ T7099] ? do_vfs_ioctl+0x50c/0x12d0 [ 56.337755][ T7099] ? ioctl_file_clone+0x180/0x180 [ 56.342794][ T7099] kvm_vcpu_compat_ioctl+0x1ab/0x350 [ 56.348068][ T7099] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.354046][ T7099] ? kvm_vcpu_ioctl+0xe60/0xe60 [ 56.358886][ T7099] ? do_sys_open+0xc3/0x140 [ 56.363374][ T7099] ? kvm_vcpu_ioctl+0xe60/0xe60 [ 56.368215][ T7099] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 56.373658][ T7099] do_fast_syscall_32+0x270/0xe90 [ 56.378667][ T7099] entry_SYSENTER_compat+0x70/0x7f [ 56.383766][ T7099] [ 56.386107][ T7099] Allocated by task 7099: [ 56.390412][ T7099] save_stack+0x1b/0x40 [ 56.394542][ T7099] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 56.400158][ T7099] kvmalloc_node+0x61/0xf0 [ 56.404550][ T7099] kvm_set_memslot+0x115/0x1530 [ 56.409375][ T7099] __kvm_set_memory_region+0xcf7/0x1320 [ 56.414896][ T7099] __x86_set_memory_region+0x2a3/0x5a0 [ 56.420329][ T7099] vmx_create_vcpu+0x2107/0x2b40 [ 56.425253][ T7099] kvm_arch_vcpu_create+0x6ef/0xb80 [ 56.430424][ T7099] kvm_vm_ioctl+0x15f7/0x23e0 [ 56.435078][ T7099] kvm_vm_compat_ioctl+0x125/0x240 [ 56.440166][ T7099] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 56.445599][ T7099] do_fast_syscall_32+0x270/0xe90 [ 56.450598][ T7099] entry_SYSENTER_compat+0x70/0x7f [ 56.455681][ T7099] [ 56.458958][ T7099] Freed by task 0: [ 56.462660][ T7099] (stack is not available) [ 56.467054][ T7099] [ 56.469375][ T7099] The buggy address belongs to the object at ffff8880a70b5000 [ 56.469375][ T7099] which belongs to the cache kmalloc-2k of size 2048 [ 56.483407][ T7099] The buggy address is located 1128 bytes inside of [ 56.483407][ T7099] 2048-byte region [ffff8880a70b5000, ffff8880a70b5800) [ 56.496838][ T7099] The buggy address belongs to the page: [ 56.502499][ T7099] page:ffffea00029c2d40 refcount:1 mapcount:0 mapping:000000006126bdce index:0x0 [ 56.511581][ T7099] flags: 0xfffe0000000200(slab) [ 56.516410][ T7099] raw: 00fffe0000000200 ffffea00029f0548 ffffea0002a01ec8 ffff8880aa000e00 [ 56.525013][ T7099] raw: 0000000000000000 ffff8880a70b5000 0000000100000001 0000000000000000 [ 56.533581][ T7099] page dumped because: kasan: bad access detected [ 56.539973][ T7099] [ 56.542283][ T7099] Memory state around the buggy address: [ 56.547890][ T7099] ffff8880a70b5300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.555929][ T7099] ffff8880a70b5380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.563977][ T7099] >ffff8880a70b5400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 56.572013][ T7099] ^ [ 56.579459][ T7099] ffff8880a70b5480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 56.587508][ T7099] ffff8880a70b5500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 56.595546][ T7099] ================================================================== [ 56.603591][ T7099] Disabling lock debugging due to kernel taint [ 56.645093][ T7099] Kernel panic - not syncing: panic_on_warn set ... [ 56.651720][ T7099] CPU: 1 PID: 7099 Comm: syz-executor012 Tainted: G B 5.7.0-rc1-syzkaller #0 [ 56.661774][ T7099] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.671938][ T7099] Call Trace: [ 56.675211][ T7099] dump_stack+0x188/0x20d [ 56.679518][ T7099] panic+0x2e3/0x75c [ 56.683434][ T7099] ? add_taint.cold+0x16/0x16 [ 56.688088][ T7099] ? preempt_schedule_common+0x5e/0xc0 [ 56.693532][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.699548][ T7099] ? preempt_schedule_thunk+0x16/0x18 [ 56.704902][ T7099] ? trace_hardirqs_on+0x55/0x220 [ 56.709914][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.715873][ T7099] end_report+0x4d/0x53 [ 56.720010][ T7099] __kasan_report.cold+0xd/0x4d [ 56.724841][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.730794][ T7099] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.736792][ T7099] kasan_report+0x33/0x50 [ 56.741097][ T7099] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 56.746895][ T7099] ? __kvm_write_guest_page+0x170/0x170 [ 56.752550][ T7099] kvm_lapic_set_vapic_addr+0x88/0x180 [ 56.757986][ T7099] kvm_arch_vcpu_ioctl+0xf0d/0x2c20 [ 56.763169][ T7099] ? kvm_arch_vcpu_put+0x530/0x530 [ 56.768692][ T7099] ? lock_acquire+0x1f2/0x8f0 [ 56.773362][ T7099] ? kvm_vcpu_ioctl+0x175/0xe60 [ 56.778235][ T7099] ? lock_release+0x800/0x800 [ 56.782885][ T7099] ? find_held_lock+0x2d/0x110 [ 56.787625][ T7099] ? __mutex_lock+0x458/0x13c0 [ 56.792363][ T7099] ? find_held_lock+0x2d/0x110 [ 56.797149][ T7099] ? kvm_vcpu_ioctl+0x175/0xe60 [ 56.801974][ T7099] ? tomoyo_path_number_perm+0x1ee/0x4d0 [ 56.807602][ T7099] ? mutex_trylock+0x2c0/0x2c0 [ 56.812367][ T7099] ? lock_downgrade+0x840/0x840 [ 56.817216][ T7099] ? quarantine_put+0x119/0x1c0 [ 56.822044][ T7099] ? kfree+0x1eb/0x2b0 [ 56.826086][ T7099] ? tomoyo_path_number_perm+0x411/0x4d0 [ 56.831702][ T7099] ? lockdep_hardirqs_on+0x463/0x620 [ 56.836977][ T7099] ? tomoyo_path_number_perm+0x238/0x4d0 [ 56.842584][ T7099] kvm_vcpu_ioctl+0x866/0xe60 [ 56.847236][ T7099] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 56.853626][ T7099] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 56.859504][ T7099] ? do_vfs_ioctl+0x50c/0x12d0 [ 56.864241][ T7099] ? ioctl_file_clone+0x180/0x180 [ 56.869249][ T7099] kvm_vcpu_compat_ioctl+0x1ab/0x350 [ 56.874517][ T7099] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.880479][ T7099] ? kvm_vcpu_ioctl+0xe60/0xe60 [ 56.885300][ T7099] ? do_sys_open+0xc3/0x140 [ 56.889779][ T7099] ? kvm_vcpu_ioctl+0xe60/0xe60 [ 56.894605][ T7099] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 56.900037][ T7099] do_fast_syscall_32+0x270/0xe90 [ 56.905036][ T7099] entry_SYSENTER_compat+0x70/0x7f [ 56.911590][ T7099] Kernel Offset: disabled [ 56.915960][ T7099] Rebooting in 86400 seconds..