[ 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 '10.128.10.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.004708][ T7241] 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. [ 67.040010][ T7241] ================================================================== [ 67.048215][ T7241] BUG: KASAN: slab-out-of-bounds in kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.056547][ T7241] Read of size 8 at addr ffff88809e3bb468 by task syz-executor088/7241 [ 67.064771][ T7241] [ 67.067082][ T7241] CPU: 1 PID: 7241 Comm: syz-executor088 Not tainted 5.6.0-syzkaller #0 [ 67.075380][ T7241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.085441][ T7241] Call Trace: [ 67.088719][ T7241] dump_stack+0x188/0x20d [ 67.093048][ T7241] print_address_description.constprop.0.cold+0xd3/0x315 [ 67.100053][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.105661][ T7241] __kasan_report.cold+0x35/0x4d [ 67.110576][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.116188][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.121797][ T7241] kasan_report+0x33/0x50 [ 67.126113][ T7241] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.131561][ T7241] try_async_pf+0x12b/0xac0 [ 67.136051][ T7241] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 67.140897][ T7241] ? mark_held_locks+0x9f/0xe0 [ 67.145643][ T7241] ? mmu_topup_memory_caches+0x325/0x460 [ 67.151272][ T7241] direct_page_fault+0x27d/0x1d70 [ 67.156291][ T7241] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 67.161472][ T7241] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 67.168220][ T7241] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 67.173263][ T7241] kvm_mmu_page_fault+0x187/0x15d0 [ 67.178470][ T7241] ? kvm_deliver_exception_payload+0x42/0x1a0 [ 67.184517][ T7241] ? kvm_multiple_exception+0x51e/0x720 [ 67.190071][ T7241] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 67.196129][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.201651][ T7241] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.207621][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.213147][ T7241] ? handle_ept_violation+0x206/0x550 [ 67.218496][ T7241] ? vmx_inject_irq+0x5b0/0x5b0 [ 67.223322][ T7241] vmx_handle_exit+0x2b8/0x1700 [ 67.228158][ T7241] vcpu_enter_guest+0xfea/0x59d0 [ 67.233068][ T7241] ? vmx_vcpu_load_vmcs+0x960/0x960 [ 67.238249][ T7241] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 67.244639][ T7241] ? kvm_arch_vcpu_ioctl_run+0x23a/0x16a0 [ 67.250340][ T7241] ? lock_release+0x800/0x800 [ 67.254993][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.260517][ T7241] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.266482][ T7241] ? lockdep_hardirqs_on+0x463/0x620 [ 67.271773][ T7241] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 67.277480][ T7241] ? kvm_arch_vcpu_ioctl_run+0x27b/0x16a0 [ 67.283210][ T7241] kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 67.288777][ T7241] kvm_vcpu_ioctl+0x493/0xe60 [ 67.293490][ T7241] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.299891][ T7241] ? ioctl_file_clone+0x180/0x180 [ 67.304929][ T7241] ? selinux_file_mprotect+0x610/0x610 [ 67.310379][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.315944][ T7241] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.321931][ T7241] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.328324][ T7241] ksys_ioctl+0x11a/0x180 [ 67.332633][ T7241] __x64_sys_ioctl+0x6f/0xb0 [ 67.337202][ T7241] ? lockdep_hardirqs_on+0x463/0x620 [ 67.342466][ T7241] do_syscall_64+0xf6/0x7d0 [ 67.346958][ T7241] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.352826][ T7241] RIP: 0033:0x440209 [ 67.356698][ T7241] 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 [ 67.376285][ T7241] RSP: 002b:00007ffd115ca0d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.384676][ T7241] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 67.392657][ T7241] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 67.400610][ T7241] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.408557][ T7241] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401a90 [ 67.416512][ T7241] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 67.424486][ T7241] [ 67.426808][ T7241] Allocated by task 7241: [ 67.431129][ T7241] save_stack+0x1b/0x80 [ 67.435272][ T7241] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.440903][ T7241] kvmalloc_node+0x61/0xf0 [ 67.445297][ T7241] kvm_set_memslot+0x115/0x1530 [ 67.450133][ T7241] __kvm_set_memory_region+0xcf7/0x1320 [ 67.455652][ T7241] kvm_set_memory_region+0x29/0x50 [ 67.460751][ T7241] kvm_vm_ioctl+0x678/0x23e0 [ 67.465326][ T7241] ksys_ioctl+0x11a/0x180 [ 67.469647][ T7241] __x64_sys_ioctl+0x6f/0xb0 [ 67.474211][ T7241] do_syscall_64+0xf6/0x7d0 [ 67.478692][ T7241] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.484551][ T7241] [ 67.486854][ T7241] Freed by task 0: [ 67.490541][ T7241] (stack is not available) [ 67.494932][ T7241] [ 67.497286][ T7241] The buggy address belongs to the object at ffff88809e3bb000 [ 67.497286][ T7241] which belongs to the cache kmalloc-2k of size 2048 [ 67.511318][ T7241] The buggy address is located 1128 bytes inside of [ 67.511318][ T7241] 2048-byte region [ffff88809e3bb000, ffff88809e3bb800) [ 67.524757][ T7241] The buggy address belongs to the page: [ 67.530371][ T7241] page:ffffea000278eec0 refcount:1 mapcount:0 mapping:00000000c2601645 index:0x0 [ 67.539453][ T7241] flags: 0xfffe0000000200(slab) [ 67.544289][ T7241] raw: 00fffe0000000200 ffffea00027b1b08 ffff8880aa001950 ffff8880aa000e00 [ 67.552867][ T7241] raw: 0000000000000000 ffff88809e3bb000 0000000100000001 0000000000000000 [ 67.561424][ T7241] page dumped because: kasan: bad access detected [ 67.567817][ T7241] [ 67.570120][ T7241] Memory state around the buggy address: [ 67.575725][ T7241] ffff88809e3bb300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.583773][ T7241] ffff88809e3bb380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.591811][ T7241] >ffff88809e3bb400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 67.599854][ T7241] ^ [ 67.607339][ T7241] ffff88809e3bb480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 67.615385][ T7241] ffff88809e3bb500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 67.623438][ T7241] ================================================================== [ 67.631478][ T7241] Disabling lock debugging due to kernel taint [ 67.659988][ T7241] Kernel panic - not syncing: panic_on_warn set ... [ 67.666587][ T7241] CPU: 0 PID: 7241 Comm: syz-executor088 Tainted: G B 5.6.0-syzkaller #0 [ 67.676302][ T7241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.686332][ T7241] Call Trace: [ 67.689600][ T7241] dump_stack+0x188/0x20d [ 67.693906][ T7241] panic+0x2e3/0x75c [ 67.697776][ T7241] ? add_taint.cold+0x16/0x16 [ 67.702434][ T7241] ? preempt_schedule_common+0x5e/0xc0 [ 67.707871][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.713475][ T7241] ? preempt_schedule_thunk+0x16/0x18 [ 67.718833][ T7241] ? trace_hardirqs_on+0x55/0x220 [ 67.723844][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.729459][ T7241] end_report+0x43/0x49 [ 67.733619][ T7241] __kasan_report.cold+0xd/0x4d [ 67.738450][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.744057][ T7241] ? kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.749703][ T7241] kasan_report+0x33/0x50 [ 67.754012][ T7241] kvm_vcpu_gfn_to_memslot+0x50e/0x540 [ 67.759483][ T7241] try_async_pf+0x12b/0xac0 [ 67.763963][ T7241] ? ept_gva_to_gpa+0x1e0/0x1e0 [ 67.768824][ T7241] ? mark_held_locks+0x9f/0xe0 [ 67.773568][ T7241] ? mmu_topup_memory_caches+0x325/0x460 [ 67.779177][ T7241] direct_page_fault+0x27d/0x1d70 [ 67.784184][ T7241] ? kvm_mmu_get_page+0x1e70/0x1e70 [ 67.789369][ T7241] ? kvm_mtrr_check_gfn_range_consistency+0x254/0x2e0 [ 67.796127][ T7241] ? kvm_vcpu_mtrr_init+0x70/0x70 [ 67.801134][ T7241] kvm_mmu_page_fault+0x187/0x15d0 [ 67.806232][ T7241] ? kvm_deliver_exception_payload+0x42/0x1a0 [ 67.812278][ T7241] ? kvm_multiple_exception+0x51e/0x720 [ 67.817846][ T7241] ? kvm_nx_lpage_recovery_worker+0x790/0x790 [ 67.823905][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.829434][ T7241] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.835422][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.840948][ T7241] ? handle_ept_violation+0x206/0x550 [ 67.846300][ T7241] ? vmx_inject_irq+0x5b0/0x5b0 [ 67.851127][ T7241] vmx_handle_exit+0x2b8/0x1700 [ 67.856006][ T7241] vcpu_enter_guest+0xfea/0x59d0 [ 67.860920][ T7241] ? vmx_vcpu_load_vmcs+0x960/0x960 [ 67.866103][ T7241] ? kvm_vcpu_reload_apic_access_page+0x300/0x300 [ 67.872497][ T7241] ? kvm_arch_vcpu_ioctl_run+0x23a/0x16a0 [ 67.878231][ T7241] ? lock_release+0x800/0x800 [ 67.882887][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.888447][ T7241] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.894405][ T7241] ? lockdep_hardirqs_on+0x463/0x620 [ 67.899673][ T7241] ? kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 67.905408][ T7241] ? kvm_arch_vcpu_ioctl_run+0x27b/0x16a0 [ 67.911109][ T7241] kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 [ 67.916674][ T7241] kvm_vcpu_ioctl+0x493/0xe60 [ 67.921337][ T7241] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.927762][ T7241] ? ioctl_file_clone+0x180/0x180 [ 67.932769][ T7241] ? selinux_file_mprotect+0x610/0x610 [ 67.938212][ T7241] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.943740][ T7241] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.949702][ T7241] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.956091][ T7241] ksys_ioctl+0x11a/0x180 [ 67.960400][ T7241] __x64_sys_ioctl+0x6f/0xb0 [ 67.964971][ T7241] ? lockdep_hardirqs_on+0x463/0x620 [ 67.970271][ T7241] do_syscall_64+0xf6/0x7d0 [ 67.974754][ T7241] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.980626][ T7241] RIP: 0033:0x440209 [ 67.984538][ T7241] 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 [ 68.004148][ T7241] RSP: 002b:00007ffd115ca0d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.012548][ T7241] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 68.020501][ T7241] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 68.028445][ T7241] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 68.036424][ T7241] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401a90 [ 68.044369][ T7241] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 68.053294][ T7241] Kernel Offset: disabled [ 68.057643][ T7241] Rebooting in 86400 seconds..