[ 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 '10.128.0.254' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.819842] FAULT_INJECTION: forcing a failure. [ 26.819842] name failslab, interval 1, probability 0, space 0, times 1 [ 26.831383] CPU: 0 PID: 7964 Comm: syz-executor413 Not tainted 4.14.283-syzkaller #0 [ 26.839339] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.848671] Call Trace: [ 26.851241] dump_stack+0x1b2/0x281 [ 26.854846] should_fail.cold+0x10a/0x149 [ 26.858974] should_failslab+0xd6/0x130 [ 26.862940] kmem_cache_alloc+0x28e/0x3c0 [ 26.867065] ptlock_alloc+0x1d/0x70 [ 26.870757] pte_alloc_one+0x57/0x100 [ 26.874543] __pte_alloc+0x25/0x2c0 [ 26.878153] copy_page_range+0x1788/0x2630 [ 26.882378] ? apply_to_page_range+0xa60/0xa60 [ 26.886933] ? validate_mm_rb+0x3a/0xa0 [ 26.890885] copy_process.part.0+0x4df8/0x71c0 [ 26.895455] ? __cleanup_sighand+0x40/0x40 [ 26.899664] _do_fork+0x184/0xc80 [ 26.903091] ? fork_idle+0x270/0x270 [ 26.906782] ? SyS_write+0x14d/0x210 [ 26.910471] ? SyS_read+0x210/0x210 [ 26.914072] ? __do_page_fault+0x159/0xad0 [ 26.918281] ? do_syscall_64+0x4c/0x640 [ 26.922231] ? sys_vfork+0x20/0x20 [ 26.925756] do_syscall_64+0x1d5/0x640 [ 26.929622] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 26.934785] RIP: 0033:0x7f5336307d39 [ 26.938467] RSP: 002b:00007ffdb4336448 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 26.946148] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f5336307d39 [ 26.953395] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 26.960672] RBP: 00007ffdb4336450 R08: 0000000000000000 R09: 00007f5336003032 [ 26.967934] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 26.975188] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.989251] ------------[ cut here ]------------ [ 26.994013] WARNING: CPU: 1 PID: 7964 at arch/x86/mm/pat.c:1020 untrack_pfn+0x203/0x250 [ 27.002133] Kernel panic - not syncing: panic_on_warn set ... [ 27.002133] [ 27.009480] CPU: 1 PID: 7964 Comm: syz-executor413 Not tainted 4.14.283-syzkaller #0 [ 27.017348] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.026685] Call Trace: [ 27.029260] dump_stack+0x1b2/0x281 [ 27.032908] panic+0x1f9/0x42d [ 27.036080] ? add_taint.cold+0x16/0x16 [ 27.040040] ? untrack_pfn+0x203/0x250 [ 27.043901] ? untrack_pfn+0x203/0x250 [ 27.047765] __warn.cold+0x20/0x44 [ 27.051284] ? ist_end_non_atomic+0x10/0x10 [ 27.055599] ? untrack_pfn+0x203/0x250 [ 27.059465] report_bug+0x208/0x250 [ 27.063067] do_error_trap+0x195/0x2d0 [ 27.066929] ? math_error+0x2d0/0x2d0 [ 27.070704] ? depot_save_stack+0x1d3/0x3f0 [ 27.075000] ? pmd_huge+0xc5/0x110 [ 27.078518] ? rbt_memtype_copy_nth_element+0x170/0x170 [ 27.083859] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.088852] invalid_op+0x1b/0x40 [ 27.092282] RIP: 0010:untrack_pfn+0x203/0x250 [ 27.096747] RSP: 0018:ffff88809f1879c0 EFLAGS: 00010297 [ 27.102084] RAX: ffff88809bfe04c0 RBX: ffff88809e6b7e70 RCX: 0000000000000000 [ 27.109328] RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffff88809f187880 [ 27.116581] RBP: 1ffff11013e30f38 R08: ffff88809f187948 R09: 0000000000000000 [ 27.123822] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.131065] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88809e6b7ec0 [ 27.138321] ? track_pfn_insert+0x140/0x140 [ 27.142617] ? vm_normal_page_pmd+0x340/0x340 [ 27.147088] ? debug_check_no_obj_freed+0x2c0/0x680 [ 27.152078] ? uprobe_munmap+0x1c/0x3e0 [ 27.156029] unmap_single_vma+0x16b/0x2b0 [ 27.160166] unmap_vmas+0x9d/0x160 [ 27.163692] exit_mmap+0x270/0x4d0 [ 27.167213] ? SyS_remap_file_pages+0x6a0/0x6a0 [ 27.171863] ? __khugepaged_exit+0x29b/0x3c0 [ 27.176263] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.181705] ? __khugepaged_exit+0x29b/0x3c0 [ 27.186099] ? kmem_cache_free+0x23a/0x2b0 [ 27.190330] ? __khugepaged_exit+0x29b/0x3c0 [ 27.194741] ? usbfs_increase_memory_usage+0x60/0x60 [ 27.199835] mmput+0xfa/0x420 [ 27.202935] ? usbfs_increase_memory_usage+0x60/0x60 [ 27.208016] copy_process.part.0+0x4dc5/0x71c0 [ 27.214041] ? __cleanup_sighand+0x40/0x40 [ 27.218256] _do_fork+0x184/0xc80 [ 27.221687] ? fork_idle+0x270/0x270 [ 27.225380] ? SyS_write+0x14d/0x210 [ 27.229089] ? SyS_read+0x210/0x210 [ 27.232699] ? __do_page_fault+0x159/0xad0 [ 27.236917] ? do_syscall_64+0x4c/0x640 [ 27.240869] ? sys_vfork+0x20/0x20 [ 27.244398] do_syscall_64+0x1d5/0x640 [ 27.248268] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.253436] RIP: 0033:0x7f5336307d39 [ 27.257164] RSP: 002b:00007ffdb4336448 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 27.264869] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f5336307d39 [ 27.272164] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 27.279426] RBP: 00007ffdb4336450 R08: 0000000000000000 R09: 00007f5336003032 [ 27.286674] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 27.293931] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.301451] Kernel Offset: disabled [ 27.305129] Rebooting in 86400 seconds..