[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.532937] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.591064] random: sshd: uninitialized urandom read (32 bytes read) [ 22.843886] random: sshd: uninitialized urandom read (32 bytes read) [ 23.754844] random: sshd: uninitialized urandom read (32 bytes read) [ 23.919819] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. [ 29.328816] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/22 21:32:57 parsed 1 programs [ 30.322200] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/22 21:32:58 executed programs: 0 [ 31.100708] IPVS: ftp: loaded support on port[0] = 21 [ 31.121976] IPVS: ftp: loaded support on port[0] = 21 [ 31.131322] IPVS: ftp: loaded support on port[0] = 21 [ 31.132286] IPVS: ftp: loaded support on port[0] = 21 [ 31.152861] IPVS: ftp: loaded support on port[0] = 21 [ 31.156585] IPVS: ftp: loaded support on port[0] = 21 [ 31.171533] IPVS: ftp: loaded support on port[0] = 21 [ 31.201457] IPVS: ftp: loaded support on port[0] = 21 [ 33.094891] WARNING: CPU: 0 PID: 4763 at net/core/stream.c:206 sk_stream_kill_queues+0x3e7/0x540 [ 33.104057] Kernel panic - not syncing: panic_on_warn set ... [ 33.104057] [ 33.111444] CPU: 0 PID: 4763 Comm: syz-executor5 Not tainted 4.18.0-rc5+ #159 [ 33.118712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.128052] Call Trace: [ 33.130645] dump_stack+0x1c9/0x2b4 [ 33.134280] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.139487] panic+0x238/0x4e7 [ 33.142698] ? add_taint.cold.5+0x16/0x16 [ 33.146848] ? __warn.cold.8+0x148/0x1ba [ 33.150896] ? __warn.cold.8+0x117/0x1ba [ 33.154958] ? sk_stream_kill_queues+0x3e7/0x540 [ 33.159724] __warn.cold.8+0x163/0x1ba [ 33.163619] ? sk_stream_kill_queues+0x3e7/0x540 [ 33.168384] report_bug+0x252/0x2d0 [ 33.172008] do_error_trap+0x1fc/0x4d0 [ 33.175900] ? math_error+0x3e0/0x3e0 [ 33.179702] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 33.184717] ? percpu_counter_add_batch+0xf2/0x150 [ 33.189648] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.194485] do_invalid_op+0x1b/0x20 [ 33.198188] invalid_op+0x14/0x20 [ 33.201633] RIP: 0010:sk_stream_kill_queues+0x3e7/0x540 [ 33.206980] 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 12 88 fb 0f 0b eb 96 e8 a9 12 88 fb <0f> 0b eb a1 e8 a0 12 88 fb 0f 0b e9 9f fe ff ff 4c 89 ef e8 61 e9 [ 33.226322] RSP: 0018:ffff8801a7f8efe0 EFLAGS: 00010293 [ 33.231684] RAX: ffff8801d3d9e080 RBX: 0000000000000000 RCX: ffffffff85f404c7 [ 33.238948] RDX: 0000000000000000 RSI: ffffffff85f40527 RDI: 0000000000000005 [ 33.246203] RBP: ffff8801a7f8f020 R08: ffff8801d3d9e080 R09: ffffed003b5c46d6 [ 33.253470] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000fe3 [ 33.260722] R13: ffff8801d82b6230 R14: ffffffff8b4b6b40 R15: 0000000000000007 [ 33.267998] ? sk_stream_kill_queues+0x387/0x540 [ 33.272767] ? sk_stream_kill_queues+0x3e7/0x540 [ 33.277520] inet_csk_destroy_sock+0x1a7/0x440 [ 33.282089] tcp_close+0xb89/0x12d0 [ 33.285707] ? tcp_check_oom+0x530/0x530 [ 33.289759] ? down_write+0x8f/0x130 [ 33.293474] ? ip_mc_drop_socket+0x20f/0x270 [ 33.297869] ? down_read+0x1d0/0x1d0 [ 33.301588] inet_release+0x104/0x1f0 [ 33.305378] __sock_release+0xd7/0x260 [ 33.309255] ? __sock_release+0x260/0x260 [ 33.313387] sock_close+0x19/0x20 [ 33.316830] __fput+0x355/0x8b0 [ 33.320101] ? fput+0x1a0/0x1a0 [ 33.323370] ? check_same_owner+0x340/0x340 [ 33.327693] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.332177] ____fput+0x15/0x20 [ 33.335443] task_work_run+0x1ec/0x2a0 [ 33.339322] ? task_work_cancel+0x250/0x250 [ 33.343636] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 33.349157] ? switch_task_namespaces+0xa2/0xd0 [ 33.353902] do_exit+0x1b08/0x2750 [ 33.357434] ? mm_update_next_owner+0x9a0/0x9a0 [ 33.362092] ? print_usage_bug+0xc0/0xc0 [ 33.366140] ? graph_lock+0x170/0x170 [ 33.369924] ? do_raw_spin_unlock+0xa7/0x2f0 [ 33.374326] ? rcu_note_context_switch+0x730/0x730 [ 33.379242] ? lock_acquire+0x1e4/0x540 [ 33.383212] ? __lock_acquire+0x7fc/0x5020 [ 33.387446] ? trace_hardirqs_on+0x10/0x10 [ 33.391667] ? kasan_check_read+0x11/0x20 [ 33.395800] ? do_raw_spin_unlock+0xa7/0x2f0 [ 33.400194] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 33.404794] ? kasan_check_write+0x14/0x20 [ 33.409020] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 33.414203] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 33.419727] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 33.424821] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.430343] ? futex_wait+0x5d2/0xa20 [ 33.434131] ? perf_trace_lock+0xde/0x920 [ 33.438282] ? zap_class+0x740/0x740 [ 33.441988] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 33.447082] ? graph_lock+0x170/0x170 [ 33.450878] ? memset+0x31/0x40 [ 33.454165] ? find_held_lock+0x36/0x1c0 [ 33.458220] ? lock_downgrade+0x8f0/0x8f0 [ 33.462359] do_group_exit+0x177/0x440 [ 33.466249] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 33.470819] ? __ia32_sys_exit+0x50/0x50 [ 33.474876] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.479361] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.484364] get_signal+0x88e/0x1970 [ 33.488069] ? ptrace_notify+0x130/0x130 [ 33.492115] ? zap_class+0x740/0x740 [ 33.495815] ? lock_downgrade+0x8f0/0x8f0 [ 33.499958] ? graph_lock+0x170/0x170 [ 33.503753] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 33.508161] do_signal+0x9c/0x21c0 [ 33.511696] ? setup_sigcontext+0x7d0/0x7d0 [ 33.516002] ? lock_downgrade+0x8f0/0x8f0 [ 33.520148] ? kasan_check_read+0x11/0x20 [ 33.524286] ? do_raw_spin_unlock+0xa7/0x2f0 [ 33.528682] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 33.533264] ? __lock_is_held+0xb5/0x140 [ 33.537325] ? exit_to_usermode_loop+0x8c/0x370 [ 33.541987] exit_to_usermode_loop+0x2e0/0x370 [ 33.546557] ? syscall_slow_exit_work+0x500/0x500 [ 33.551390] ? do_syscall_64+0x9a/0x820 [ 33.555356] do_syscall_64+0x6be/0x820 [ 33.559232] ? syscall_slow_exit_work+0x500/0x500 [ 33.564073] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.568993] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.573920] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 33.579274] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.584107] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.589301] RIP: 0033:0x455ab9 [ 33.592471] 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 [ 33.611769] RSP: 002b:00007f5405553ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 33.619470] RAX: fffffffffffffe00 RBX: 000000000072bf68 RCX: 0000000000455ab9 [ 33.626742] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bf68 [ 33.633997] RBP: 000000000072bf68 R08: 0000000000000000 R09: 000000000072bf48 [ 33.641257] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 33.648513] R13: 00007ffc3f28f5ff R14: 00007f54055549c0 R15: 0000000000000001 [ 33.656583] Dumping ftrace buffer: [ 33.660332] (ftrace buffer empty) [ 33.664035] Kernel Offset: disabled [ 33.667649] Rebooting in 86400 seconds..