[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.494751] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.591342] random: sshd: uninitialized urandom read (32 bytes read) [ 19.920751] random: sshd: uninitialized urandom read (32 bytes read) [ 20.681197] random: sshd: uninitialized urandom read (32 bytes read) [ 21.071932] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.41' (ECDSA) to the list of known hosts. [ 26.443567] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/02 03:44:08 parsed 1 programs 2018/05/02 03:44:08 executed programs: 0 [ 26.911409] IPVS: ftp: loaded support on port[0] = 21 [ 26.975634] FAULT_INJECTION: forcing a failure. [ 26.975634] name fail_page_alloc, interval 1, probability 0, space 0, times 1 [ 26.987483] CPU: 0 PID: 4451 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #28 [ 26.994650] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.003988] Call Trace: [ 27.006569] dump_stack+0x1b9/0x294 [ 27.010181] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.015357] should_fail.cold.4+0xa/0x1a [ 27.019399] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 27.024486] ? debug_check_no_locks_freed+0x310/0x310 [ 27.029657] ? find_held_lock+0x36/0x1c0 [ 27.033708] ? check_same_owner+0x320/0x320 [ 27.038017] ? rcu_note_context_switch+0x710/0x710 [ 27.042936] ? __might_sleep+0x95/0x190 [ 27.046896] __alloc_pages_nodemask+0x34e/0xd70 [ 27.051547] ? __alloc_pages_slowpath+0x2db0/0x2db0 [ 27.056545] ? find_held_lock+0x36/0x1c0 [ 27.060591] ? lock_downgrade+0x8e0/0x8e0 [ 27.064722] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 27.069284] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 27.074805] alloc_pages_current+0x10c/0x210 [ 27.079195] __change_page_attr_set_clr+0x411/0x2ce0 [ 27.084285] ? _lookup_address_cpa.isra.24+0xa0/0xa0 [ 27.089368] ? graph_lock+0x170/0x170 [ 27.093148] ? lock_downgrade+0x8e0/0x8e0 [ 27.097280] ? find_held_lock+0x36/0x1c0 [ 27.101326] ? lock_downgrade+0x8e0/0x8e0 [ 27.105458] ? kasan_check_read+0x11/0x20 [ 27.109586] ? do_raw_spin_unlock+0x9e/0x2e0 [ 27.113985] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 27.118551] ? lookup_address_in_pgd+0xb1/0x530 [ 27.123203] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 27.128197] ? pfn_range_is_mapped+0xdc/0x110 [ 27.132673] __change_page_attr_set_clr+0x2517/0x2ce0 [ 27.137845] ? note_gp_changes+0x540/0x540 [ 27.142071] ? _lookup_address_cpa.isra.24+0xa0/0xa0 [ 27.147160] ? kasan_check_write+0x14/0x20 [ 27.151386] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 27.156306] ? wait_for_completion+0x870/0x870 [ 27.161211] ? __lock_is_held+0xb5/0x140 [ 27.165265] ? kasan_check_read+0x11/0x20 [ 27.169394] ? do_raw_spin_unlock+0x9e/0x2e0 [ 27.173784] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 27.178355] ? _raw_spin_unlock+0x22/0x30 [ 27.182485] ? mutex_unlock+0xd/0x10 [ 27.186184] ? vm_unmap_aliases+0x4ea/0x600 [ 27.190499] ? __kasan_slab_free+0x11a/0x170 [ 27.194895] ? purge_fragmented_blocks_allcpus+0xbb0/0xbb0 [ 27.200503] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 27.205072] change_page_attr_set_clr+0x44a/0x11a0 [ 27.209997] ? __change_page_attr_set_clr+0x2ce0/0x2ce0 [ 27.215349] ? trace_hardirqs_off+0xd/0x10 [ 27.219585] ? quarantine_put+0xeb/0x190 [ 27.223629] ? bpf_check+0x3d2/0x5f60 [ 27.227411] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.232407] ? trace_hardirqs_on+0xd/0x10 [ 27.236542] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.242062] ? do_jit+0x73a0/0x73a0 [ 27.245671] ? __bpf_prog_run64+0x120/0x120 [ 27.249973] set_memory_ro+0x73/0x90 [ 27.253670] ? _set_memory_wb+0x90/0x90 [ 27.257634] ? ktime_get+0x430/0x430 [ 27.261341] ? __might_sleep+0x95/0x190 [ 27.265296] ? __bpf_prog_run64+0x120/0x120 [ 27.269597] bpf_prog_select_runtime+0x19b/0x640 [ 27.274337] ? memset+0x31/0x40 [ 27.277600] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.283120] bpf_prog_load+0x16c5/0x2080 [ 27.287164] ? bpf_prog_new_fd+0x60/0x60 [ 27.291230] ? lock_downgrade+0x8e0/0x8e0 [ 27.295363] ? lock_release+0xa10/0xa10 [ 27.299316] ? check_same_owner+0x320/0x320 [ 27.303619] ? __check_object_size+0x95/0x5d9 [ 27.308098] ? __might_sleep+0x95/0x190 [ 27.312059] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.317580] __x64_sys_bpf+0x389/0x4c0 [ 27.321451] ? bpf_prog_get+0x20/0x20 [ 27.325234] ? do_syscall_64+0x92/0x800 [ 27.329190] do_syscall_64+0x1b1/0x800 [ 27.333060] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.337971] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.342885] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.348230] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.353054] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.358221] RIP: 0033:0x455979 [ 27.361389] RSP: 002b:00007ffeb752d428 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 27.369077] RAX: ffffffffffffffda RBX: 0000000001cc4914 RCX: 0000000000455979 [ 27.376327] RDX: 0000000000000018 RSI: 0000000020b7a000 RDI: 0000000000000005 [ 27.383578] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 27.390838] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 27.398090] R13: 0000000000000046 R14: 00000000006f4730 R15: 0000000000000017 [ 27.405509] WARNING: CPU: 0 PID: 4451 at include/linux/filter.h:651 bpf_prog_select_runtime+0x53c/0x640 [ 27.415043] Kernel panic - not syncing: panic_on_warn set ... [ 27.415043] [ 27.422411] CPU: 0 PID: 4451 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #28 [ 27.429585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.438916] Call Trace: [ 27.441492] dump_stack+0x1b9/0x294 [ 27.445103] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.450277] ? bpf_prog_select_runtime+0x4e0/0x640 [ 27.455189] panic+0x22f/0x4de [ 27.458363] ? add_taint.cold.5+0x16/0x16 [ 27.462495] ? __warn.cold.8+0x148/0x1b3 [ 27.466534] ? __warn.cold.8+0x117/0x1b3 [ 27.470579] ? bpf_prog_select_runtime+0x53c/0x640 [ 27.475491] __warn.cold.8+0x163/0x1b3 [ 27.479357] ? bpf_prog_select_runtime+0x53c/0x640 [ 27.484279] report_bug+0x252/0x2d0 [ 27.487900] do_error_trap+0x1de/0x490 [ 27.491789] ? trace_hardirqs_off+0xd/0x10 [ 27.496004] ? math_error+0x420/0x420 [ 27.499800] ? bpf_check+0x3d2/0x5f60 [ 27.503592] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.508587] ? trace_hardirqs_on+0xd/0x10 [ 27.512718] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.518262] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.523090] do_invalid_op+0x1b/0x20 [ 27.526785] invalid_op+0x14/0x20 [ 27.530219] RIP: 0010:bpf_prog_select_runtime+0x53c/0x640 [ 27.535733] RSP: 0018:ffff8801b6997a50 EFLAGS: 00010293 [ 27.541078] RAX: ffff8801b735e280 RBX: ffffc90001e4a000 RCX: ffffffff81858bc7 [ 27.548332] RDX: 0000000000000000 RSI: ffffffff81858f5c RDI: 0000000000000005 [ 27.555580] RBP: ffff8801b6997ab0 R08: ffff8801b735e280 R09: 0000000000000000 [ 27.562833] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 [ 27.570086] R13: ffffffff818630b0 R14: ffffc90001e4a000 R15: ffff8801b6997b18 [ 27.577342] ? __bpf_prog_run64+0x120/0x120 [ 27.581649] ? bpf_prog_select_runtime+0x1a7/0x640 [ 27.586562] ? bpf_prog_select_runtime+0x53c/0x640 [ 27.591476] ? memset+0x31/0x40 [ 27.594740] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.600274] bpf_prog_load+0x16c5/0x2080 [ 27.604319] ? bpf_prog_new_fd+0x60/0x60 [ 27.608376] ? lock_downgrade+0x8e0/0x8e0 [ 27.612513] ? lock_release+0xa10/0xa10 [ 27.616469] ? check_same_owner+0x320/0x320 [ 27.620771] ? __check_object_size+0x95/0x5d9 [ 27.625249] ? __might_sleep+0x95/0x190 [ 27.629210] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.634729] __x64_sys_bpf+0x389/0x4c0 [ 27.638597] ? bpf_prog_get+0x20/0x20 [ 27.642383] ? do_syscall_64+0x92/0x800 [ 27.646341] do_syscall_64+0x1b1/0x800 [ 27.650208] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.655120] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.660037] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.665384] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.670211] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.675379] RIP: 0033:0x455979 [ 27.678548] RSP: 002b:00007ffeb752d428 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 27.686236] RAX: ffffffffffffffda RBX: 0000000001cc4914 RCX: 0000000000455979 [ 27.693483] RDX: 0000000000000018 RSI: 0000000020b7a000 RDI: 0000000000000005 [ 27.700733] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 27.707980] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 27.715228] R13: 0000000000000046 R14: 00000000006f4730 R15: 0000000000000017 [ 27.723050] Dumping ftrace buffer: [ 27.726681] (ftrace buffer empty) [ 27.730368] Kernel Offset: disabled [ 27.733977] Rebooting in 86400 seconds..