[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.881820] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.898398] random: sshd: uninitialized urandom read (32 bytes read) [ 22.326801] random: sshd: uninitialized urandom read (32 bytes read) [ 23.069252] random: sshd: uninitialized urandom read (32 bytes read) [ 23.226148] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 28.602592] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.699221] WARNING: CPU: 1 PID: 4510 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 28.707677] Kernel panic - not syncing: panic_on_warn set ... [ 28.707677] [ 28.715051] CPU: 1 PID: 4510 Comm: syz-executor381 Not tainted 4.17.0-rc4+ #48 [ 28.722395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.731735] Call Trace: [ 28.734312] dump_stack+0x1b9/0x294 [ 28.737924] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.743100] ? smc_unhash_sk+0x2b0/0x4a0 [ 28.747143] panic+0x22f/0x4de [ 28.750314] ? add_taint.cold.5+0x16/0x16 [ 28.754444] ? __warn.cold.8+0x148/0x1b3 [ 28.758492] ? __warn.cold.8+0x117/0x1b3 [ 28.762549] ? smc_unhash_sk+0x345/0x4a0 [ 28.766597] __warn.cold.8+0x163/0x1b3 [ 28.770470] ? smc_unhash_sk+0x345/0x4a0 [ 28.774518] report_bug+0x252/0x2d0 [ 28.778146] do_error_trap+0x1de/0x490 [ 28.782022] ? graph_lock+0x170/0x170 [ 28.785816] ? math_error+0x420/0x420 [ 28.789608] ? lock_acquire+0x1dc/0x520 [ 28.793572] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.798401] do_invalid_op+0x1b/0x20 [ 28.802099] invalid_op+0x14/0x20 [ 28.805537] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 28.810182] RSP: 0018:ffff8801ad127488 EFLAGS: 00010293 [ 28.815526] RAX: ffff8801ad28c700 RBX: ffff8801d91677c0 RCX: ffffffff8740e9de [ 28.822775] RDX: 0000000000000000 RSI: ffffffff8740ea95 RDI: 0000000000000005 [ 28.830033] RBP: ffff8801ad127570 R08: ffff8801ad28c700 R09: ffffed003b22cf08 [ 28.837283] R10: ffffed003b22cf08 R11: ffff8801d9167843 R12: 1ffff10035a24e95 [ 28.844533] R13: ffff8801ad127548 R14: ffffffff8970d5e0 R15: ffff8801d9167840 [ 28.851793] ? smc_unhash_sk+0x28e/0x4a0 [ 28.855833] ? smc_unhash_sk+0x345/0x4a0 [ 28.859877] ? smc_unhash_sk+0x345/0x4a0 [ 28.863921] ? smc_rx_data_available+0x100/0x100 [ 28.868675] ? release_sock+0x1e2/0x2b0 [ 28.872635] ? __local_bh_enable_ip+0x161/0x230 [ 28.877291] ? __release_sock+0x3a0/0x3a0 [ 28.881421] ? smc_release+0x269/0x610 [ 28.885290] ? trace_hardirqs_on+0xd/0x10 [ 28.889419] ? __local_bh_enable_ip+0x161/0x230 [ 28.894082] smc_release+0x36e/0x610 [ 28.897780] sock_release+0x96/0x1b0 [ 28.901491] ? sock_alloc_file+0x4e0/0x4e0 [ 28.905704] sock_close+0x16/0x20 [ 28.909142] __fput+0x34d/0x890 [ 28.912416] ? fput+0x1a0/0x1a0 [ 28.915683] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.920168] ____fput+0x15/0x20 [ 28.923432] task_work_run+0x1e4/0x290 [ 28.927317] ? task_work_cancel+0x240/0x240 [ 28.931642] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.937163] ? switch_task_namespaces+0xa2/0xd0 [ 28.941813] do_exit+0x1aee/0x2730 [ 28.945344] ? mm_update_next_owner+0x980/0x980 [ 28.949994] ? lock_downgrade+0x8e0/0x8e0 [ 28.954132] ? noop_count+0x40/0x40 [ 28.957740] ? lock_pin_lock+0x350/0x350 [ 28.961785] ? kasan_check_read+0x11/0x20 [ 28.965913] ? rcu_is_watching+0x85/0x140 [ 28.970046] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 28.975219] ? is_bpf_text_address+0xd7/0x170 [ 28.979694] ? check_usage_backwards+0x151/0x3a0 [ 28.984429] ? graph_lock+0x170/0x170 [ 28.988207] ? graph_lock+0x170/0x170 [ 28.991994] ? find_held_lock+0x36/0x1c0 [ 28.996060] ? lock_downgrade+0x8e0/0x8e0 [ 29.000204] ? kasan_check_read+0x11/0x20 [ 29.004333] ? do_raw_spin_unlock+0x9e/0x2e0 [ 29.008723] ? __local_bh_enable_ip+0x161/0x230 [ 29.013378] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.018373] ? release_sock+0x1e2/0x2b0 [ 29.022326] ? trace_hardirqs_on+0xd/0x10 [ 29.026455] ? __local_bh_enable_ip+0x161/0x230 [ 29.031110] ? _raw_spin_unlock_bh+0x30/0x40 [ 29.035498] ? release_sock+0x1e2/0x2b0 [ 29.039458] ? __release_sock+0x3a0/0x3a0 [ 29.043593] ? __local_bh_enable_ip+0x161/0x230 [ 29.048245] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 29.053416] ? smc_setsockopt+0x1ed/0x6d0 [ 29.057547] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.063065] ? __sys_setsockopt+0x24f/0x390 [ 29.067372] do_group_exit+0x16f/0x430 [ 29.071240] ? mm_fault_error+0x380/0x380 [ 29.075371] ? __ia32_sys_exit+0x50/0x50 [ 29.079413] ? do_syscall_64+0x92/0x800 [ 29.083369] __x64_sys_exit_group+0x3e/0x50 [ 29.087669] do_syscall_64+0x1b1/0x800 [ 29.091539] ? syscall_return_slowpath+0x5c0/0x5c0 [ 29.096449] ? syscall_return_slowpath+0x30f/0x5c0 [ 29.101364] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 29.106710] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.111537] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.116705] RIP: 0033:0x43e8d8 [ 29.119873] RSP: 002b:00007ffd05d9dd48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.127560] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 29.134810] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 29.142462] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 29.149711] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 29.156960] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 29.164798] Dumping ftrace buffer: [ 29.168428] (ftrace buffer empty) [ 29.172125] Kernel Offset: disabled [ 29.175744] Rebooting in 86400 seconds..