[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.206664] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.910702] random: sshd: uninitialized urandom read (32 bytes read) [ 20.101211] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.842413] random: sshd: uninitialized urandom read (32 bytes read) [ 20.998909] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. [ 26.403933] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.493760] WARNING: CPU: 0 PID: 4499 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 26.502150] Kernel panic - not syncing: panic_on_warn set ... [ 26.502150] [ 26.509625] CPU: 0 PID: 4499 Comm: syz-executor312 Not tainted 4.17.0-rc6+ #60 [ 26.516962] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.526301] Call Trace: [ 26.528875] dump_stack+0x1b9/0x294 [ 26.532486] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.537662] ? smc_unhash_sk+0x270/0x4a0 [ 26.541706] panic+0x22f/0x4de [ 26.544879] ? add_taint.cold.5+0x16/0x16 [ 26.549013] ? __warn.cold.8+0x148/0x1b3 [ 26.553071] ? __warn.cold.8+0x117/0x1b3 [ 26.557116] ? smc_unhash_sk+0x345/0x4a0 [ 26.561159] __warn.cold.8+0x163/0x1b3 [ 26.565060] ? smc_unhash_sk+0x345/0x4a0 [ 26.569107] report_bug+0x252/0x2d0 [ 26.572718] do_error_trap+0x1de/0x490 [ 26.576585] ? graph_lock+0x170/0x170 [ 26.580369] ? math_error+0x420/0x420 [ 26.584154] ? lock_acquire+0x1dc/0x520 [ 26.588114] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.592939] do_invalid_op+0x1b/0x20 [ 26.596636] invalid_op+0x14/0x20 [ 26.600077] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 26.604725] RSP: 0018:ffff8801ada0f488 EFLAGS: 00010293 [ 26.610071] RAX: ffff8801ad4c42c0 RBX: ffff8801afabd7c0 RCX: ffffffff8741d11e [ 26.617324] RDX: 0000000000000000 RSI: ffffffff8741d1d5 RDI: 0000000000000005 [ 26.624573] RBP: ffff8801ada0f570 R08: ffff8801ad4c42c0 R09: ffffed0035f57b08 [ 26.631822] R10: ffffed0035f57b08 R11: ffff8801afabd843 R12: 1ffff10035b41e95 [ 26.639077] R13: ffff8801ada0f548 R14: ffffffff8970e020 R15: ffff8801afabd840 [ 26.646344] ? smc_unhash_sk+0x28e/0x4a0 [ 26.650388] ? smc_unhash_sk+0x345/0x4a0 [ 26.654437] ? smc_unhash_sk+0x345/0x4a0 [ 26.658486] ? smc_rx_data_available+0x100/0x100 [ 26.663226] ? release_sock+0x1e2/0x2b0 [ 26.667185] ? __local_bh_enable_ip+0x161/0x230 [ 26.671844] ? __release_sock+0x3a0/0x3a0 [ 26.675976] ? smc_release+0x269/0x610 [ 26.679847] ? trace_hardirqs_on+0xd/0x10 [ 26.683976] ? __local_bh_enable_ip+0x161/0x230 [ 26.688630] smc_release+0x36e/0x610 [ 26.692338] sock_release+0x96/0x1b0 [ 26.696052] ? sock_alloc_file+0x4e0/0x4e0 [ 26.700276] sock_close+0x16/0x20 [ 26.703710] __fput+0x34d/0x890 [ 26.706973] ? fput+0x1a0/0x1a0 [ 26.710236] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.714713] ____fput+0x15/0x20 [ 26.717985] task_work_run+0x1e4/0x290 [ 26.721864] ? task_work_cancel+0x240/0x240 [ 26.726170] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.731690] ? switch_task_namespaces+0xa2/0xd0 [ 26.736341] do_exit+0x1aee/0x2730 [ 26.739868] ? mm_update_next_owner+0x980/0x980 [ 26.744517] ? lock_downgrade+0x8e0/0x8e0 [ 26.748643] ? noop_count+0x40/0x40 [ 26.752250] ? lock_pin_lock+0x350/0x350 [ 26.756295] ? kasan_check_read+0x11/0x20 [ 26.760423] ? rcu_is_watching+0x85/0x140 [ 26.764551] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 26.769725] ? is_bpf_text_address+0xd7/0x170 [ 26.774214] ? check_usage_backwards+0x151/0x3a0 [ 26.778954] ? graph_lock+0x170/0x170 [ 26.782734] ? graph_lock+0x170/0x170 [ 26.786531] ? find_held_lock+0x36/0x1c0 [ 26.790579] ? lock_downgrade+0x8e0/0x8e0 [ 26.794709] ? kasan_check_read+0x11/0x20 [ 26.798836] ? do_raw_spin_unlock+0x9e/0x2e0 [ 26.803229] ? __local_bh_enable_ip+0x161/0x230 [ 26.807881] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.812881] ? release_sock+0x1e2/0x2b0 [ 26.816837] ? trace_hardirqs_on+0xd/0x10 [ 26.820975] ? __local_bh_enable_ip+0x161/0x230 [ 26.825624] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.830018] ? release_sock+0x1e2/0x2b0 [ 26.833983] ? __release_sock+0x3a0/0x3a0 [ 26.838113] ? __local_bh_enable_ip+0x161/0x230 [ 26.842767] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 26.847941] ? smc_setsockopt+0x1ed/0x6d0 [ 26.852077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.857597] ? __sys_setsockopt+0x24f/0x390 [ 26.861901] do_group_exit+0x16f/0x430 [ 26.865769] ? mm_fault_error+0x380/0x380 [ 26.869897] ? __ia32_sys_exit+0x50/0x50 [ 26.873941] ? do_syscall_64+0x92/0x800 [ 26.877895] __x64_sys_exit_group+0x3e/0x50 [ 26.882200] do_syscall_64+0x1b1/0x800 [ 26.886080] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 26.890904] ? syscall_return_slowpath+0x5c0/0x5c0 [ 26.895812] ? syscall_return_slowpath+0x30f/0x5c0 [ 26.900725] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 26.906087] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.910912] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.916080] RIP: 0033:0x43e8d8 [ 26.919249] RSP: 002b:00007ffe189c3718 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.926946] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 26.934207] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.941457] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.948717] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 26.955967] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 26.963865] Dumping ftrace buffer: [ 26.967485] (ftrace buffer empty) [ 26.971174] Kernel Offset: disabled [ 26.974783] Rebooting in 86400 seconds..