[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.051221] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.227848] random: sshd: uninitialized urandom read (32 bytes read) [ 21.519524] random: sshd: uninitialized urandom read (32 bytes read) [ 22.237569] random: sshd: uninitialized urandom read (32 bytes read) [ 22.396342] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 27.853536] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/07 06:46:57 parsed 1 programs 2018/05/07 06:46:57 executed programs: 0 [ 28.351822] IPVS: ftp: loaded support on port[0] = 21 [ 28.424825] FAULT_INJECTION: forcing a failure. [ 28.424825] name fail_page_alloc, interval 1, probability 0, space 0, times 1 [ 28.436776] CPU: 1 PID: 4515 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #36 [ 28.443947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.453285] Call Trace: [ 28.455862] dump_stack+0x1b9/0x294 [ 28.459476] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.464663] ? zap_class+0x720/0x720 [ 28.468368] should_fail.cold.4+0xa/0x1a [ 28.472417] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 28.477507] ? graph_lock+0x170/0x170 [ 28.481310] ? debug_check_no_locks_freed+0x310/0x310 [ 28.486488] ? bpf_prog_kallsyms_find+0xd6/0x4a0 [ 28.491233] ? find_held_lock+0x36/0x1c0 [ 28.495292] ? __lock_is_held+0xb5/0x140 [ 28.499388] ? check_same_owner+0x320/0x320 [ 28.503780] ? zap_class+0x720/0x720 [ 28.507485] ? rcu_note_context_switch+0x710/0x710 [ 28.512402] ? __might_sleep+0x95/0x190 [ 28.516362] __alloc_pages_nodemask+0x34e/0xd70 [ 28.521029] ? __alloc_pages_slowpath+0x2db0/0x2db0 [ 28.526051] ? find_held_lock+0x36/0x1c0 [ 28.530109] ? lock_downgrade+0x8e0/0x8e0 [ 28.534245] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 28.538815] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 28.544349] alloc_pages_current+0x10c/0x210 [ 28.548747] __change_page_attr_set_clr+0x411/0x2ce0 [ 28.553854] ? _lookup_address_cpa.isra.24+0xa0/0xa0 [ 28.558948] ? graph_lock+0x170/0x170 [ 28.562744] ? lock_downgrade+0x8e0/0x8e0 [ 28.566894] ? perf_trace_lock+0xd6/0x900 [ 28.571053] ? find_held_lock+0x36/0x1c0 [ 28.575113] ? lock_downgrade+0x8e0/0x8e0 [ 28.579253] ? kasan_check_read+0x11/0x20 [ 28.583388] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.587783] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 28.592454] ? lookup_address_in_pgd+0xb1/0x530 [ 28.597120] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 28.602141] ? pfn_range_is_mapped+0xdc/0x110 [ 28.606801] __change_page_attr_set_clr+0x2517/0x2ce0 [ 28.611988] ? note_gp_changes+0x540/0x540 [ 28.616232] ? _lookup_address_cpa.isra.24+0xa0/0xa0 [ 28.621323] ? kasan_check_write+0x14/0x20 [ 28.625551] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 28.630484] ? wait_for_completion+0x870/0x870 [ 28.635066] ? __lock_is_held+0xb5/0x140 [ 28.639387] ? kasan_check_read+0x11/0x20 [ 28.643526] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.647928] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 28.652514] ? _raw_spin_unlock+0x22/0x30 [ 28.656663] ? mutex_unlock+0xd/0x10 [ 28.660380] ? vm_unmap_aliases+0x4ea/0x600 [ 28.664704] ? purge_fragmented_blocks_allcpus+0xbb0/0xbb0 [ 28.670316] ? __get_filter+0x1e0/0x280 [ 28.674284] ? kasan_check_read+0x11/0x20 [ 28.678425] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.682833] change_page_attr_set_clr+0x44a/0x11a0 [ 28.687753] ? __change_page_attr_set_clr+0x2ce0/0x2ce0 [ 28.693101] ? __lock_is_held+0xb5/0x140 [ 28.697155] ? mark_held_locks+0xc9/0x160 [ 28.701290] ? quarantine_put+0xeb/0x190 [ 28.705337] ? kfree+0x111/0x260 [ 28.708687] ? bpf_convert_filter+0x37fe/0x4400 [ 28.713341] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.718340] ? trace_hardirqs_on+0xd/0x10 [ 28.722478] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.728010] ? do_jit+0x7420/0x7420 [ 28.731638] ? __bpf_prog_run64+0x120/0x120 [ 28.735955] set_memory_ro+0x73/0x90 [ 28.739673] ? _set_memory_wb+0x90/0x90 [ 28.743657] ? __kmalloc_track_caller+0x5f5/0x760 [ 28.748498] ? quarantine_put+0xeb/0x190 [ 28.752560] ? __bpf_prog_run64+0x120/0x120 [ 28.756873] bpf_prog_select_runtime+0x19b/0x640 [ 28.761621] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 28.766626] ? bpf_prog_realloc+0x7a/0x340 [ 28.770868] bpf_prepare_filter+0xb65/0x1060 [ 28.775271] ? bpf_convert_filter+0x4400/0x4400 [ 28.779940] ? memcpy+0x45/0x50 [ 28.783215] ? kmemdup+0x44/0x50 [ 28.786573] ? bpf_prog_store_orig_filter.isra.46+0x147/0x1f0 [ 28.792456] __get_filter+0x1e0/0x280 [ 28.796249] sk_attach_filter+0x1d/0x90 [ 28.800217] __tun_chr_ioctl+0x1198/0x4420 [ 28.804443] ? tun_chr_read_iter+0x1e0/0x1e0 [ 28.808855] ? zap_class+0x720/0x720 [ 28.812563] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 28.817743] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 28.822487] ? graph_lock+0x170/0x170 [ 28.826273] ? graph_lock+0x170/0x170 [ 28.830074] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.835597] ? proc_fail_nth_write+0x96/0x1f0 [ 28.840086] ? proc_cwd_link+0x1d0/0x1d0 [ 28.844136] ? find_held_lock+0x36/0x1c0 [ 28.848194] tun_chr_ioctl+0x2a/0x40 [ 28.851898] ? tun_chr_compat_ioctl+0x30/0x30 [ 28.856397] do_vfs_ioctl+0x1cf/0x16a0 [ 28.860303] ? ioctl_preallocate+0x2e0/0x2e0 [ 28.864723] ? fget_raw+0x20/0x20 [ 28.868182] ? __sb_end_write+0xac/0xe0 [ 28.872163] ? ksys_write+0x1a6/0x250 [ 28.875961] ? security_file_ioctl+0x94/0xc0 [ 28.880369] ksys_ioctl+0xa9/0xd0 [ 28.883912] __x64_sys_ioctl+0x73/0xb0 [ 28.887802] do_syscall_64+0x1b1/0x800 [ 28.891855] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 28.896696] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.901616] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.906554] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.911920] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.916763] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.921940] RIP: 0033:0x455979 [ 28.925112] RSP: 002b:0000000000a3e8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 28.932819] RAX: ffffffffffffffda RBX: 00000000012b1914 RCX: 0000000000455979 [ 28.940093] RDX: 0000000020000180 RSI: 00000000401054d5 RDI: 0000000000000004 [ 28.947359] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 28.954619] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 28.961875] R13: 0000000000000367 R14: 00000000006f9248 R15: 000000000000000a [ 28.969328] WARNING: CPU: 1 PID: 4515 at include/linux/filter.h:651 bpf_prog_select_runtime+0x53c/0x640 [ 28.978863] Kernel panic - not syncing: panic_on_warn set ... [ 28.978863] [ 28.986228] CPU: 1 PID: 4515 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #36 [ 28.993409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.002751] Call Trace: [ 29.005350] dump_stack+0x1b9/0x294 [ 29.008987] ? dump_stack_print_info.cold.2+0x52/0x52 [ 29.014173] ? bpf_prog_select_runtime+0x4f0/0x640 [ 29.019092] panic+0x22f/0x4de [ 29.022280] ? add_taint.cold.5+0x16/0x16 [ 29.026625] ? __warn.cold.8+0x148/0x1b3 [ 29.030694] ? __warn.cold.8+0x117/0x1b3 [ 29.034745] ? bpf_prog_select_runtime+0x53c/0x640 [ 29.039667] __warn.cold.8+0x163/0x1b3 [ 29.043543] ? bpf_prog_select_runtime+0x53c/0x640 [ 29.048465] report_bug+0x252/0x2d0 [ 29.052089] do_error_trap+0x1de/0x490 [ 29.055976] ? math_error+0x420/0x420 [ 29.059776] ? kfree+0x111/0x260 [ 29.063129] ? bpf_convert_filter+0x37fe/0x4400 [ 29.067792] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.072796] ? trace_hardirqs_on+0xd/0x10 [ 29.077028] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 29.082565] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.087404] do_invalid_op+0x1b/0x20 [ 29.091110] invalid_op+0x14/0x20 [ 29.094555] RIP: 0010:bpf_prog_select_runtime+0x53c/0x640 [ 29.100083] RSP: 0018:ffff8801d9ba7788 EFLAGS: 00010293 [ 29.105439] RAX: ffff8801ae0ee5c0 RBX: ffffc90001e52000 RCX: ffffffff818588b7 [ 29.112703] RDX: 0000000000000000 RSI: ffffffff81858c4c RDI: 0000000000000005 [ 29.119984] RBP: ffff8801d9ba77e8 R08: ffff8801ae0ee5c0 R09: 0000000000000006 [ 29.127256] R10: ffff8801ae0ee5c0 R11: 0000000000000000 R12: 00000000fffffff4 [ 29.134520] R13: ffffffff81862da0 R14: 0000000000000000 R15: ffff8801d77eb9c0 [ 29.141806] ? __bpf_prog_run64+0x120/0x120 [ 29.146128] ? bpf_prog_select_runtime+0x1a7/0x640 [ 29.151054] ? bpf_prog_select_runtime+0x53c/0x640 [ 29.155983] ? bpf_prog_select_runtime+0x53c/0x640 [ 29.160910] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 29.165933] ? bpf_prog_realloc+0x7a/0x340 [ 29.170158] bpf_prepare_filter+0xb65/0x1060 [ 29.174558] ? bpf_convert_filter+0x4400/0x4400 [ 29.179223] ? memcpy+0x45/0x50 [ 29.182497] ? kmemdup+0x44/0x50 [ 29.185881] ? bpf_prog_store_orig_filter.isra.46+0x147/0x1f0 [ 29.191778] __get_filter+0x1e0/0x280 [ 29.195585] sk_attach_filter+0x1d/0x90 [ 29.199554] __tun_chr_ioctl+0x1198/0x4420 [ 29.203799] ? tun_chr_read_iter+0x1e0/0x1e0 [ 29.208202] ? zap_class+0x720/0x720 [ 29.211903] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 29.217094] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 29.221838] ? graph_lock+0x170/0x170 [ 29.225638] ? graph_lock+0x170/0x170 [ 29.229434] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 29.234963] ? proc_fail_nth_write+0x96/0x1f0 [ 29.239455] ? proc_cwd_link+0x1d0/0x1d0 [ 29.243508] ? find_held_lock+0x36/0x1c0 [ 29.247569] tun_chr_ioctl+0x2a/0x40 [ 29.251282] ? tun_chr_compat_ioctl+0x30/0x30 [ 29.255776] do_vfs_ioctl+0x1cf/0x16a0 [ 29.259748] ? ioctl_preallocate+0x2e0/0x2e0 [ 29.264151] ? fget_raw+0x20/0x20 [ 29.267599] ? __sb_end_write+0xac/0xe0 [ 29.271564] ? ksys_write+0x1a6/0x250 [ 29.275362] ? security_file_ioctl+0x94/0xc0 [ 29.279764] ksys_ioctl+0xa9/0xd0 [ 29.283218] __x64_sys_ioctl+0x73/0xb0 [ 29.287100] do_syscall_64+0x1b1/0x800 [ 29.290990] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 29.295851] ? syscall_return_slowpath+0x5c0/0x5c0 [ 29.300801] ? syscall_return_slowpath+0x30f/0x5c0 [ 29.305734] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 29.311093] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.315936] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.321112] RIP: 0033:0x455979 [ 29.324293] RSP: 002b:0000000000a3e8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 29.331995] RAX: ffffffffffffffda RBX: 00000000012b1914 RCX: 0000000000455979 [ 29.339263] RDX: 0000000020000180 RSI: 00000000401054d5 RDI: 0000000000000004 [ 29.346521] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 29.353785] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 29.361048] R13: 0000000000000367 R14: 00000000006f9248 R15: 000000000000000a [ 29.369012] Dumping ftrace buffer: [ 29.372678] (ftrace buffer empty) [ 29.376369] Kernel Offset: disabled [ 29.379980] Rebooting in 86400 seconds..