[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.0.169' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 65.027653][ T7158] 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. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 79.908702][T11856] ================================================================== [ 79.917244][T11856] BUG: KASAN: slab-out-of-bounds in gfn_to_hva+0x4a0/0x4c0 [ 79.924654][T11856] Read of size 8 at addr ffff8880a66c7468 by task syz-executor832/11856 [ 79.932957][T11856] [ 79.935284][T11856] CPU: 0 PID: 11856 Comm: syz-executor832 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 79.945253][T11856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.955307][T11856] Call Trace: [ 79.958613][T11856] dump_stack+0x188/0x20d [ 79.962973][T11856] print_address_description.constprop.0.cold+0xd3/0x315 [ 79.970012][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 79.974619][T11856] __kasan_report.cold+0x35/0x4d [ 79.979573][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 79.984089][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 79.988616][T11856] kasan_report+0x33/0x50 [ 79.992963][T11856] gfn_to_hva+0x4a0/0x4c0 [ 79.997312][T11856] kvm_arch_mmu_notifier_invalidate_range+0x21/0x80 [ 80.003944][T11856] kvm_mmu_notifier_invalidate_range_start+0x1a1/0x280 [ 80.010811][T11856] ? kvm_flush_remote_tlbs+0x120/0x120 [ 80.016287][T11856] __mmu_notifier_invalidate_range_start+0x4bc/0x6b0 [ 80.022979][T11856] change_protection+0x1ed0/0x2710 [ 80.028120][T11856] ? __vma_adjust+0xbf6/0x1c50 [ 80.032928][T11856] ? prot_none_pte_entry+0x150/0x150 [ 80.038227][T11856] ? vma_wants_writenotify+0x223/0x4f0 [ 80.043732][T11856] ? vma_set_page_prot+0x19c/0x250 [ 80.048858][T11856] mprotect_fixup+0x46c/0x940 [ 80.053571][T11856] ? change_protection+0x2710/0x2710 [ 80.058865][T11856] ? vmacache_find+0x62/0x300 [ 80.063552][T11856] ? apparmor_file_mprotect+0xe8/0x110 [ 80.069044][T11856] do_mprotect_pkey+0x542/0x950 [ 80.073911][T11856] ? mprotect_fixup+0x940/0x940 [ 80.078768][T11856] ? handle_mm_fault+0x29e/0x660 [ 80.083895][T11856] ? trace_hardirqs_off_caller+0x55/0x230 [ 80.089625][T11856] __x64_sys_mprotect+0x74/0xb0 [ 80.094486][T11856] ? lockdep_hardirqs_on+0x463/0x620 [ 80.099777][T11856] do_syscall_64+0xf6/0x7d0 [ 80.104319][T11856] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 80.110215][T11856] RIP: 0033:0x446a27 [ 80.114112][T11856] Code: 00 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 80.133722][T11856] RSP: 002b:00007ffda70da9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000000a [ 80.142146][T11856] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 0000000000446a27 [ 80.150163][T11856] RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f35ddfbb000 [ 80.158580][T11856] RBP: 00007ffda70daaa0 R08: 00000000006dba20 R09: 00000000006dba20 [ 80.166647][T11856] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda70daac0 [ 80.174714][T11856] R13: 00007f35ddfdb700 R14: 00007f35ddfdb9c0 R15: 000000000000002d [ 80.182704][T11856] [ 80.185033][T11856] Allocated by task 11861: [ 80.189456][T11856] save_stack+0x1b/0x40 [ 80.193624][T11856] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 80.199263][T11856] kvmalloc_node+0x61/0xf0 [ 80.203687][T11856] kvm_set_memslot+0x115/0x1530 [ 80.208810][T11856] __kvm_set_memory_region+0xcf7/0x1320 [ 80.214359][T11856] kvm_set_memory_region+0x29/0x50 [ 80.219479][T11856] kvm_vm_ioctl+0x678/0x2400 [ 80.224088][T11856] ksys_ioctl+0x11a/0x180 [ 80.228427][T11856] __x64_sys_ioctl+0x6f/0xb0 [ 80.233154][T11856] do_syscall_64+0xf6/0x7d0 [ 80.237665][T11856] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 80.243549][T11856] [ 80.245879][T11856] Freed by task 10589: [ 80.249960][T11856] save_stack+0x1b/0x40 [ 80.254121][T11856] __kasan_slab_free+0xf7/0x140 [ 80.258971][T11856] kfree+0x109/0x2b0 [ 80.262873][T11856] kvfree+0x42/0x50 [ 80.266685][T11856] kvm_free_memslots+0x1b9/0x230 [ 80.271623][T11856] kvm_put_kvm+0x7d2/0xc40 [ 80.276037][T11856] kvm_vm_release+0x3f/0x50 [ 80.280542][T11856] __fput+0x33e/0x880 [ 80.284612][T11856] task_work_run+0xf4/0x1b0 [ 80.289116][T11856] do_exit+0xb53/0x2e10 [ 80.293272][T11856] do_group_exit+0x125/0x340 [ 80.297866][T11856] get_signal+0x47b/0x24e0 [ 80.302286][T11856] do_signal+0x81/0x2240 [ 80.306548][T11856] exit_to_usermode_loop+0x26c/0x360 [ 80.311927][T11856] do_syscall_64+0x6b1/0x7d0 [ 80.316560][T11856] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 80.322449][T11856] [ 80.324782][T11856] The buggy address belongs to the object at ffff8880a66c7000 [ 80.324782][T11856] which belongs to the cache kmalloc-2k of size 2048 [ 80.338842][T11856] The buggy address is located 1128 bytes inside of [ 80.338842][T11856] 2048-byte region [ffff8880a66c7000, ffff8880a66c7800) [ 80.352720][T11856] The buggy address belongs to the page: [ 80.358368][T11856] page:ffffea000299b1c0 refcount:1 mapcount:0 mapping:00000000b32d132d index:0x0 [ 80.367480][T11856] flags: 0xfffe0000000200(slab) [ 80.372343][T11856] raw: 00fffe0000000200 ffffea0002980848 ffffea0002980f88 ffff8880aa000e00 [ 80.380949][T11856] raw: 0000000000000000 ffff8880a66c7000 0000000100000001 0000000000000000 [ 80.389532][T11856] page dumped because: kasan: bad access detected [ 80.396053][T11856] [ 80.398406][T11856] Memory state around the buggy address: [ 80.404040][T11856] ffff8880a66c7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 80.412197][T11856] ffff8880a66c7380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 80.420273][T11856] >ffff8880a66c7400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 80.428337][T11856] ^ [ 80.435820][T11856] ffff8880a66c7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 80.443983][T11856] ffff8880a66c7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 80.452045][T11856] ================================================================== executing program [ 80.460193][T11856] Disabling lock debugging due to kernel taint [ 80.509540][T11856] Kernel panic - not syncing: panic_on_warn set ... [ 80.516152][T11856] CPU: 1 PID: 11856 Comm: syz-executor832 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 [ 80.527503][T11856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.537568][T11856] Call Trace: [ 80.540861][T11856] dump_stack+0x188/0x20d [ 80.545185][T11856] panic+0x2e3/0x75c [ 80.549101][T11856] ? add_taint.cold+0x16/0x16 [ 80.554205][T11856] ? preempt_schedule_common+0x5e/0xc0 [ 80.559657][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 80.564766][T11856] ? preempt_schedule_thunk+0x16/0x18 [ 80.570142][T11856] ? trace_hardirqs_on+0x55/0x220 [ 80.575168][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 80.579824][T11856] end_report+0x4d/0x53 [ 80.584315][T11856] __kasan_report.cold+0xd/0x4d [ 80.589269][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 80.593753][T11856] ? gfn_to_hva+0x4a0/0x4c0 [ 80.598241][T11856] kasan_report+0x33/0x50 [ 80.602672][T11856] gfn_to_hva+0x4a0/0x4c0 [ 80.606994][T11856] kvm_arch_mmu_notifier_invalidate_range+0x21/0x80 [ 80.613587][T11856] kvm_mmu_notifier_invalidate_range_start+0x1a1/0x280 [ 80.620417][T11856] ? kvm_flush_remote_tlbs+0x120/0x120 [ 80.625871][T11856] __mmu_notifier_invalidate_range_start+0x4bc/0x6b0 [ 80.633222][T11856] change_protection+0x1ed0/0x2710 [ 80.638402][T11856] ? __vma_adjust+0xbf6/0x1c50 [ 80.643317][T11856] ? prot_none_pte_entry+0x150/0x150 [ 80.648604][T11856] ? vma_wants_writenotify+0x223/0x4f0 [ 80.654063][T11856] ? vma_set_page_prot+0x19c/0x250 [ 80.659182][T11856] mprotect_fixup+0x46c/0x940 [ 80.663853][T11856] ? change_protection+0x2710/0x2710 [ 80.669128][T11856] ? vmacache_find+0x62/0x300 [ 80.673788][T11856] ? apparmor_file_mprotect+0xe8/0x110 [ 80.679257][T11856] do_mprotect_pkey+0x542/0x950 [ 80.684200][T11856] ? mprotect_fixup+0x940/0x940 [ 80.689486][T11856] ? handle_mm_fault+0x29e/0x660 [ 80.694432][T11856] ? trace_hardirqs_off_caller+0x55/0x230 [ 80.700152][T11856] __x64_sys_mprotect+0x74/0xb0 [ 80.705010][T11856] ? lockdep_hardirqs_on+0x463/0x620 [ 80.710558][T11856] do_syscall_64+0xf6/0x7d0 [ 80.715151][T11856] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 80.721041][T11856] RIP: 0033:0x446a27 [ 80.724955][T11856] Code: 00 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 80.745079][T11856] RSP: 002b:00007ffda70da9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000000a [ 80.753836][T11856] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 0000000000446a27 [ 80.761810][T11856] RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f35ddfbb000 [ 80.769776][T11856] RBP: 00007ffda70daaa0 R08: 00000000006dba20 R09: 00000000006dba20 [ 80.777746][T11856] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda70daac0 [ 80.785719][T11856] R13: 00007f35ddfdb700 R14: 00007f35ddfdb9c0 R15: 000000000000002d [ 80.795072][T11856] Kernel Offset: disabled [ 80.799390][T11856] Rebooting in 86400 seconds..