[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.809364] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.746201] random: sshd: uninitialized urandom read (32 bytes read) [ 20.005373] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.719594] random: sshd: uninitialized urandom read (32 bytes read) [ 34.210394] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 39.621605] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 39.728321] WARNING: CPU: 1 PID: 4493 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 39.736790] Kernel panic - not syncing: panic_on_warn set ... [ 39.736790] [ 39.744137] CPU: 1 PID: 4493 Comm: syz-executor315 Not tainted 4.17.0-rc4+ #42 [ 39.751471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.760800] Call Trace: [ 39.763374] dump_stack+0x1b9/0x294 [ 39.767077] ? dump_stack_print_info.cold.2+0x52/0x52 [ 39.772337] ? smc_unhash_sk+0x2d0/0x4a0 [ 39.776378] panic+0x22f/0x4de [ 39.781194] ? add_taint.cold.5+0x16/0x16 [ 39.785352] ? __warn.cold.8+0x148/0x1b3 [ 39.789426] ? __warn.cold.8+0x117/0x1b3 [ 39.793503] ? smc_unhash_sk+0x345/0x4a0 [ 39.797565] __warn.cold.8+0x163/0x1b3 [ 39.801440] ? smc_unhash_sk+0x345/0x4a0 [ 39.805496] report_bug+0x252/0x2d0 [ 39.809157] do_error_trap+0x1de/0x490 [ 39.813036] ? graph_lock+0x170/0x170 [ 39.816822] ? math_error+0x420/0x420 [ 39.820631] ? lock_acquire+0x1dc/0x520 [ 39.824602] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.829441] do_invalid_op+0x1b/0x20 [ 39.833139] invalid_op+0x14/0x20 [ 39.836574] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 39.841221] RSP: 0018:ffff8801ac7ef488 EFLAGS: 00010293 [ 39.846563] RAX: ffff8801b04701c0 RBX: ffff8801b093a7c0 RCX: ffffffff87404cbe [ 39.854304] RDX: 0000000000000000 RSI: ffffffff87404d75 RDI: 0000000000000005 [ 39.861595] RBP: ffff8801ac7ef570 R08: ffff8801b04701c0 R09: ffffed0036127508 [ 39.868877] R10: ffffed0036127508 R11: ffff8801b093a843 R12: 1ffff100358fde95 [ 39.876143] R13: ffff8801ac7ef548 R14: ffffffff8970cc20 R15: ffff8801b093a840 [ 39.883407] ? smc_unhash_sk+0x28e/0x4a0 [ 39.887453] ? smc_unhash_sk+0x345/0x4a0 [ 39.891498] ? smc_unhash_sk+0x345/0x4a0 [ 39.895545] ? smc_rx_data_available+0x100/0x100 [ 39.900290] ? release_sock+0x1e2/0x2b0 [ 39.904254] ? __local_bh_enable_ip+0x161/0x230 [ 39.908904] ? __release_sock+0x3a0/0x3a0 [ 39.913031] ? smc_release+0x269/0x610 [ 39.916895] ? trace_hardirqs_on+0xd/0x10 [ 39.921033] ? __local_bh_enable_ip+0x161/0x230 [ 39.925685] smc_release+0x36e/0x610 [ 39.929384] sock_release+0x96/0x1b0 [ 39.933260] ? sock_alloc_file+0x4e0/0x4e0 [ 39.937480] sock_close+0x16/0x20 [ 39.940923] __fput+0x34d/0x890 [ 39.944284] ? fput+0x1a0/0x1a0 [ 39.947542] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.952015] ____fput+0x15/0x20 [ 39.955275] task_work_run+0x1e4/0x290 [ 39.959149] ? task_work_cancel+0x240/0x240 [ 39.963473] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 39.969012] ? switch_task_namespaces+0xa2/0xd0 [ 39.973667] do_exit+0x1aee/0x2730 [ 39.977194] ? mm_update_next_owner+0x980/0x980 [ 39.981863] ? lock_downgrade+0x8e0/0x8e0 [ 39.986014] ? noop_count+0x40/0x40 [ 39.989626] ? lock_pin_lock+0x350/0x350 [ 39.993670] ? kasan_check_read+0x11/0x20 [ 39.997794] ? rcu_is_watching+0x85/0x140 [ 40.001923] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 40.007101] ? is_bpf_text_address+0xd7/0x170 [ 40.011603] ? check_usage_backwards+0x151/0x3a0 [ 40.016340] ? graph_lock+0x170/0x170 [ 40.020649] ? graph_lock+0x170/0x170 [ 40.024444] ? find_held_lock+0x36/0x1c0 [ 40.028490] ? lock_downgrade+0x8e0/0x8e0 [ 40.032618] ? kasan_check_read+0x11/0x20 [ 40.036745] ? do_raw_spin_unlock+0x9e/0x2e0 [ 40.041132] ? __local_bh_enable_ip+0x161/0x230 [ 40.045777] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.050772] ? release_sock+0x1e2/0x2b0 [ 40.054723] ? trace_hardirqs_on+0xd/0x10 [ 40.058849] ? __local_bh_enable_ip+0x161/0x230 [ 40.063496] ? _raw_spin_unlock_bh+0x30/0x40 [ 40.067884] ? release_sock+0x1e2/0x2b0 [ 40.071836] ? __release_sock+0x3a0/0x3a0 [ 40.075970] ? __local_bh_enable_ip+0x161/0x230 [ 40.081664] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 40.086843] ? smc_setsockopt+0x1ed/0x630 [ 40.091202] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.096753] ? __sys_setsockopt+0x24f/0x390 [ 40.101070] do_group_exit+0x16f/0x430 [ 40.104952] ? mm_fault_error+0x380/0x380 [ 40.109081] ? __ia32_sys_exit+0x50/0x50 [ 40.113124] ? do_syscall_64+0x92/0x800 [ 40.117078] __x64_sys_exit_group+0x3e/0x50 [ 40.121384] do_syscall_64+0x1b1/0x800 [ 40.125255] ? syscall_return_slowpath+0x5c0/0x5c0 [ 40.130173] ? syscall_return_slowpath+0x30f/0x5c0 [ 40.135091] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 40.140438] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.145269] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.150449] RIP: 0033:0x43e8d8 [ 40.153663] RSP: 002b:00007ffe21471bd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 40.161968] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 40.169237] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 40.176490] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 40.183745] R10: 0000000020000140 R11: 0000000000000246 R12: 0000000000000001 [ 40.190998] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 40.198970] Dumping ftrace buffer: [ 40.202591] (ftrace buffer empty) [ 40.206292] Kernel Offset: disabled [ 40.209919] Rebooting in 86400 seconds..