[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.632612] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.386740] random: sshd: uninitialized urandom read (32 bytes read) [ 23.650603] random: sshd: uninitialized urandom read (32 bytes read) [ 24.536861] random: sshd: uninitialized urandom read (32 bytes read) [ 42.595249] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. [ 48.005683] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/22 07:49:29 parsed 1 programs [ 49.170399] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/22 07:49:30 executed programs: 0 [ 50.410838] IPVS: ftp: loaded support on port[0] = 21 [ 50.418154] IPVS: ftp: loaded support on port[0] = 21 [ 50.423825] IPVS: ftp: loaded support on port[0] = 21 [ 50.427616] IPVS: ftp: loaded support on port[0] = 21 [ 50.450429] IPVS: ftp: loaded support on port[0] = 21 [ 50.467912] IPVS: ftp: loaded support on port[0] = 21 [ 50.498104] IPVS: ftp: loaded support on port[0] = 21 [ 50.499640] IPVS: ftp: loaded support on port[0] = 21 [ 50.794880] ip (4635) used greatest stack depth: 16952 bytes left [ 52.257262] WARNING: CPU: 0 PID: 4739 at net/core/stream.c:206 sk_stream_kill_queues+0x3e7/0x540 [ 52.266295] Kernel panic - not syncing: panic_on_warn set ... [ 52.266295] [ 52.273645] CPU: 0 PID: 4739 Comm: syz-executor7 Not tainted 4.18.0-rc5+ #158 [ 52.280900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.290240] Call Trace: [ 52.292820] dump_stack+0x1c9/0x2b4 [ 52.296440] ? dump_stack_print_info.cold.2+0x52/0x52 [ 52.301627] panic+0x238/0x4e7 [ 52.304799] ? add_taint.cold.5+0x16/0x16 [ 52.308930] ? __warn.cold.8+0x148/0x1ba [ 52.312975] ? __warn.cold.8+0x117/0x1ba [ 52.317019] ? sk_stream_kill_queues+0x3e7/0x540 [ 52.321753] __warn.cold.8+0x163/0x1ba [ 52.325622] ? sk_stream_kill_queues+0x3e7/0x540 [ 52.330369] report_bug+0x252/0x2d0 [ 52.333984] do_error_trap+0x1fc/0x4d0 [ 52.337861] ? math_error+0x3e0/0x3e0 [ 52.341650] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 52.346648] ? percpu_counter_add_batch+0xf2/0x150 [ 52.351560] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.356392] do_invalid_op+0x1b/0x20 [ 52.360122] invalid_op+0x14/0x20 [ 52.363563] RIP: 0010:sk_stream_kill_queues+0x3e7/0x540 [ 52.368903] Code: 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 41 44 8b a3 f0 01 00 00 e9 5f ff ff ff e8 b2 18 88 fb 0f 0b eb 96 e8 a9 18 88 fb <0f> 0b eb a1 e8 a0 18 88 fb 0f 0b e9 9f fe ff ff 4c 89 ef e8 61 ef [ 52.388666] RSP: 0018:ffff8801d8b26fe0 EFLAGS: 00010293 [ 52.394041] RAX: ffff8801ad68e080 RBX: 0000000000000000 RCX: ffffffff85f3f4c7 [ 52.401325] RDX: 0000000000000000 RSI: ffffffff85f3f527 RDI: 0000000000000005 [ 52.408613] RBP: ffff8801d8b27020 R08: ffff8801ad68e080 R09: ffffed003b5c46d6 [ 52.415875] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000fe3 [ 52.423131] R13: ffff8801beb90df0 R14: ffffffff8b4b6b40 R15: 0000000000000007 [ 52.430418] ? sk_stream_kill_queues+0x387/0x540 [ 52.435172] ? sk_stream_kill_queues+0x3e7/0x540 [ 52.439932] inet_csk_destroy_sock+0x1a7/0x440 [ 52.444512] tcp_close+0xb89/0x12d0 [ 52.448231] ? tcp_check_oom+0x530/0x530 [ 52.452282] ? down_write+0x8f/0x130 [ 52.455990] ? ip_mc_drop_socket+0x20f/0x270 [ 52.460399] ? down_read+0x1d0/0x1d0 [ 52.464121] inet_release+0x104/0x1f0 [ 52.467918] __sock_release+0xd7/0x260 [ 52.471800] ? __sock_release+0x260/0x260 [ 52.475942] sock_close+0x19/0x20 [ 52.479412] __fput+0x355/0x8b0 [ 52.482678] ? fput+0x1a0/0x1a0 [ 52.485949] ? check_same_owner+0x340/0x340 [ 52.490255] ? _raw_spin_unlock_irq+0x27/0x70 [ 52.494739] ____fput+0x15/0x20 [ 52.498006] task_work_run+0x1ec/0x2a0 [ 52.501897] ? task_work_cancel+0x250/0x250 [ 52.506225] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 52.511754] ? switch_task_namespaces+0xa2/0xd0 [ 52.516416] do_exit+0x1b08/0x2750 [ 52.519946] ? mm_update_next_owner+0x9a0/0x9a0 [ 52.524598] ? print_usage_bug+0xc0/0xc0 [ 52.528648] ? graph_lock+0x170/0x170 [ 52.532437] ? do_raw_spin_unlock+0xa7/0x2f0 [ 52.536852] ? rcu_note_context_switch+0x730/0x730 [ 52.541773] ? lock_acquire+0x1e4/0x540 [ 52.545762] ? __lock_acquire+0x7fc/0x5020 [ 52.550189] ? trace_hardirqs_on+0x10/0x10 [ 52.554424] ? kasan_check_read+0x11/0x20 [ 52.558577] ? do_raw_spin_unlock+0xa7/0x2f0 [ 52.562969] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 52.567557] ? kasan_check_write+0x14/0x20 [ 52.571779] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 52.576970] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 52.582492] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 52.587580] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.593100] ? futex_wait+0x5d2/0xa20 [ 52.596897] ? perf_trace_lock+0xde/0x920 [ 52.601054] ? zap_class+0x740/0x740 [ 52.604774] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 52.609888] ? graph_lock+0x170/0x170 [ 52.613699] ? memset+0x31/0x40 [ 52.616982] ? find_held_lock+0x36/0x1c0 [ 52.621047] ? lock_downgrade+0x8f0/0x8f0 [ 52.625191] do_group_exit+0x177/0x440 [ 52.629069] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 52.633636] ? __ia32_sys_exit+0x50/0x50 [ 52.637688] ? _raw_spin_unlock_irq+0x27/0x70 [ 52.642173] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 52.647180] get_signal+0x88e/0x1970 [ 52.650908] ? ptrace_notify+0x130/0x130 [ 52.654977] ? zap_class+0x740/0x740 [ 52.659823] ? lock_downgrade+0x8f0/0x8f0 [ 52.663982] ? graph_lock+0x170/0x170 [ 52.667807] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 52.672208] do_signal+0x9c/0x21c0 [ 52.675760] ? setup_sigcontext+0x7d0/0x7d0 [ 52.680091] ? lock_downgrade+0x8f0/0x8f0 [ 52.684243] ? kasan_check_read+0x11/0x20 [ 52.688380] ? do_raw_spin_unlock+0xa7/0x2f0 [ 52.692796] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 52.697367] ? __lock_is_held+0xb5/0x140 [ 52.701422] ? exit_to_usermode_loop+0x8c/0x370 [ 52.706091] exit_to_usermode_loop+0x2e0/0x370 [ 52.710739] ? syscall_slow_exit_work+0x500/0x500 [ 52.715579] ? do_syscall_64+0x9a/0x820 [ 52.719555] do_syscall_64+0x6be/0x820 [ 52.723442] ? syscall_return_slowpath+0x5e0/0x5e0 [ 52.728372] ? syscall_return_slowpath+0x31d/0x5e0 [ 52.733313] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 52.738685] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.743524] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.748695] RIP: 0033:0x455ab9 [ 52.752515] Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 52.771813] RSP: 002b:00007efc0fa77ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 52.779510] RAX: fffffffffffffe00 RBX: 000000000072bf68 RCX: 0000000000455ab9 [ 52.786766] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bf68 [ 52.794048] RBP: 000000000072bf68 R08: 0000000000000000 R09: 000000000072bf48 [ 52.801316] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 52.808592] R13: 0000000000a3e80f R14: 00007efc0fa789c0 R15: 0000000000000001 [ 52.816615] Dumping ftrace buffer: [ 52.820287] (ftrace buffer empty) [ 52.823994] Kernel Offset: disabled [ 52.827607] Rebooting in 86400 seconds..