[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.371614] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.756652] random: sshd: uninitialized urandom read (32 bytes read) [ 20.070675] random: sshd: uninitialized urandom read (32 bytes read) [ 20.807541] random: sshd: uninitialized urandom read (32 bytes read) [ 20.968267] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts. [ 26.512714] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.618369] WARNING: CPU: 0 PID: 4486 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 26.626812] Kernel panic - not syncing: panic_on_warn set ... [ 26.626812] [ 26.634164] CPU: 0 PID: 4486 Comm: syz-executor824 Not tainted 4.17.0-rc3+ #33 [ 26.641515] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.650846] Call Trace: [ 26.653430] dump_stack+0x1b9/0x294 [ 26.657045] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.662227] ? smc_unhash_sk+0x270/0x4a0 [ 26.666273] panic+0x22f/0x4de [ 26.669448] ? add_taint.cold.5+0x16/0x16 [ 26.673582] ? __warn.cold.8+0x148/0x1b3 [ 26.677623] ? __warn.cold.8+0x117/0x1b3 [ 26.681666] ? smc_unhash_sk+0x345/0x4a0 [ 26.685723] __warn.cold.8+0x163/0x1b3 [ 26.689598] ? smc_unhash_sk+0x345/0x4a0 [ 26.693641] report_bug+0x252/0x2d0 [ 26.697256] do_error_trap+0x1de/0x490 [ 26.701126] ? graph_lock+0x170/0x170 [ 26.704908] ? math_error+0x420/0x420 [ 26.708706] ? lock_acquire+0x1dc/0x520 [ 26.712681] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.717510] do_invalid_op+0x1b/0x20 [ 26.721211] invalid_op+0x14/0x20 [ 26.724648] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 26.729293] RSP: 0018:ffff8801b02b7488 EFLAGS: 00010293 [ 26.734639] RAX: ffff8801b0250040 RBX: ffff8801b01c97c0 RCX: ffffffff873fe71e [ 26.741888] RDX: 0000000000000000 RSI: ffffffff873fe7d5 RDI: 0000000000000005 [ 26.749139] RBP: ffff8801b02b7570 R08: ffff8801b0250040 R09: ffffed0036039308 [ 26.756399] R10: ffffed0036039308 R11: ffff8801b01c9843 R12: 1ffff10036056e95 [ 26.763655] R13: ffff8801b02b7548 R14: ffffffff8970e4e0 R15: ffff8801b01c9840 [ 26.770917] ? smc_unhash_sk+0x28e/0x4a0 [ 26.774961] ? smc_unhash_sk+0x345/0x4a0 [ 26.779007] ? smc_unhash_sk+0x345/0x4a0 [ 26.783058] ? smc_rx_data_available+0x100/0x100 [ 26.787797] ? release_sock+0x1e2/0x2b0 [ 26.791755] ? __local_bh_enable_ip+0x161/0x230 [ 26.796406] ? __release_sock+0x3a0/0x3a0 [ 26.800539] ? smc_release+0x269/0x610 [ 26.804412] ? trace_hardirqs_on+0xd/0x10 [ 26.808552] ? __local_bh_enable_ip+0x161/0x230 [ 26.813206] smc_release+0x36e/0x610 [ 26.816907] sock_release+0x96/0x1b0 [ 26.820603] ? sock_alloc_file+0x4e0/0x4e0 [ 26.824821] sock_close+0x16/0x20 [ 26.828259] __fput+0x34d/0x890 [ 26.831524] ? fput+0x1a0/0x1a0 [ 26.834787] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.839277] ____fput+0x15/0x20 [ 26.842558] task_work_run+0x1e4/0x290 [ 26.846452] ? task_work_cancel+0x240/0x240 [ 26.850759] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.856280] ? switch_task_namespaces+0xa2/0xd0 [ 26.860934] do_exit+0x1aee/0x2730 [ 26.864462] ? mm_update_next_owner+0x980/0x980 [ 26.869120] ? find_held_lock+0x36/0x1c0 [ 26.873176] ? lock_downgrade+0x8e0/0x8e0 [ 26.877306] ? lock_downgrade+0x8e0/0x8e0 [ 26.881457] ? kasan_check_read+0x11/0x20 [ 26.885588] ? do_raw_spin_unlock+0x9e/0x2e0 [ 26.889979] ? __local_bh_enable_ip+0x161/0x230 [ 26.894638] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.899638] ? release_sock+0x1e2/0x2b0 [ 26.903600] ? trace_hardirqs_on+0xd/0x10 [ 26.907745] ? __local_bh_enable_ip+0x161/0x230 [ 26.912396] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.916792] ? release_sock+0x1e2/0x2b0 [ 26.920750] ? __release_sock+0x3a0/0x3a0 [ 26.924882] ? __local_bh_enable_ip+0x161/0x230 [ 26.929540] ? lock_sock_nested+0xe7/0x120 [ 26.933763] ? smc_sendmsg+0x2d5/0x370 [ 26.937632] ? smc_sendpage+0x1a0/0x1a0 [ 26.941596] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.947125] ? sock_sendmsg+0x5a/0x120 [ 26.950996] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.956520] ? __sys_sendto+0x475/0x670 [ 26.960476] ? __ia32_sys_getpeername+0xb0/0xb0 [ 26.965129] ? lock_downgrade+0x8e0/0x8e0 [ 26.969259] ? handle_mm_fault+0x8c0/0xc70 [ 26.973489] ? handle_mm_fault+0x55a/0xc70 [ 26.977712] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.983235] do_group_exit+0x16f/0x430 [ 26.987105] ? mm_fault_error+0x380/0x380 [ 26.991235] ? __ia32_sys_exit+0x50/0x50 [ 26.995281] ? do_syscall_64+0x92/0x800 [ 26.999239] __x64_sys_exit_group+0x3e/0x50 [ 27.003544] do_syscall_64+0x1b1/0x800 [ 27.007431] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 27.012256] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.017167] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.022083] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.027431] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.032267] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.037438] RIP: 0033:0x43e928 [ 27.040606] RSP: 002b:00007ffc088f9e48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.048304] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e928 [ 27.055553] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.062832] RBP: 00000000004be2c0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.070082] R10: 0000000024048880 R11: 0000000000000246 R12: 0000000000000001 [ 27.077347] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.085293] Dumping ftrace buffer: [ 27.088969] (ftrace buffer empty) [ 27.092659] Kernel Offset: disabled [ 27.096268] Rebooting in 86400 seconds..