[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.542780] random: sshd: uninitialized urandom read (32 bytes read) [ 20.673843] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.953540] random: sshd: uninitialized urandom read (32 bytes read) [ 21.779007] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.940898] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. [ 27.536970] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 27.645070] WARNING: CPU: 0 PID: 4538 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 27.653457] Kernel panic - not syncing: panic_on_warn set ... [ 27.653457] [ 27.660802] CPU: 0 PID: 4538 Comm: syz-executor761 Not tainted 4.17.0+ #84 [ 27.667787] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.677118] Call Trace: [ 27.679699] dump_stack+0x1b9/0x294 [ 27.683321] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.688493] ? smc_unhash_sk+0x290/0x4a0 [ 27.692535] panic+0x22f/0x4de [ 27.695716] ? add_taint.cold.5+0x16/0x16 [ 27.699846] ? __warn.cold.8+0x148/0x1b3 [ 27.703884] ? __warn.cold.8+0x117/0x1b3 [ 27.707937] ? smc_unhash_sk+0x345/0x4a0 [ 27.711978] __warn.cold.8+0x163/0x1b3 [ 27.715852] ? smc_unhash_sk+0x345/0x4a0 [ 27.719891] report_bug+0x252/0x2d0 [ 27.723501] do_error_trap+0x1fc/0x4d0 [ 27.727369] ? math_error+0x3f0/0x3f0 [ 27.731152] ? print_usage_bug+0xc0/0xc0 [ 27.735195] ? lock_acquire+0x1dc/0x520 [ 27.739170] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.743998] do_invalid_op+0x1b/0x20 [ 27.747695] invalid_op+0x14/0x20 [ 27.751130] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 27.755771] Code: 00 49 c7 44 24 08 00 00 00 00 41 c7 44 24 10 00 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 db 40 29 fa <0f> 0b e9 51 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 a5 6a 66 fa [ 27.774947] RSP: 0018:ffff8801abfef480 EFLAGS: 00010293 [ 27.780290] RAX: ffff8801ac3ba3c0 RBX: ffff8801ac289800 RCX: ffffffff8750fbfe [ 27.787536] RDX: 0000000000000000 RSI: ffffffff8750fcb5 RDI: 0000000000000005 [ 27.794787] RBP: ffff8801abfef568 R08: ffff8801ac3ba3c0 R09: ffffed0035851310 [ 27.802038] R10: ffffed0035851310 R11: ffff8801ac289883 R12: 1ffff100357fde94 [ 27.809297] R13: ffff8801abfef540 R14: ffffffff8992d600 R15: ffff8801ac289880 [ 27.816555] ? smc_unhash_sk+0x28e/0x4a0 [ 27.820595] ? smc_unhash_sk+0x345/0x4a0 [ 27.824642] ? smc_rx_data_available+0x100/0x100 [ 27.829380] ? release_sock+0x1e2/0x2b0 [ 27.833335] ? __local_bh_enable_ip+0x161/0x230 [ 27.837985] ? __release_sock+0x3a0/0x3a0 [ 27.842135] ? smc_release+0x269/0x610 [ 27.846040] ? trace_hardirqs_on+0xd/0x10 [ 27.850172] ? __local_bh_enable_ip+0x161/0x230 [ 27.854825] smc_release+0x36e/0x610 [ 27.858521] __sock_release+0xd7/0x260 [ 27.862388] ? __sock_release+0x260/0x260 [ 27.866514] sock_close+0x19/0x20 [ 27.869957] __fput+0x353/0x890 [ 27.873222] ? fput+0x1a0/0x1a0 [ 27.876484] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.880958] ____fput+0x15/0x20 [ 27.884224] task_work_run+0x1e4/0x290 [ 27.888094] ? task_work_cancel+0x240/0x240 [ 27.892407] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.897927] ? switch_task_namespaces+0xa2/0xd0 [ 27.902663] do_exit+0x1aee/0x2730 [ 27.906187] ? mm_update_next_owner+0x980/0x980 [ 27.910836] ? lock_downgrade+0x8e0/0x8e0 [ 27.914963] ? noop_count+0x40/0x40 [ 27.918571] ? lock_pin_lock+0x350/0x350 [ 27.922615] ? kasan_check_read+0x11/0x20 [ 27.926753] ? rcu_is_watching+0x85/0x140 [ 27.930882] ? rcu_report_qs_rnp+0x790/0x790 [ 27.935276] ? is_bpf_text_address+0xd7/0x170 [ 27.939754] ? check_usage_backwards+0x151/0x3a0 [ 27.944500] ? graph_lock+0x170/0x170 [ 27.948281] ? graph_lock+0x170/0x170 [ 27.952075] ? find_held_lock+0x36/0x1c0 [ 27.956124] ? lock_downgrade+0x8e0/0x8e0 [ 27.960258] ? kasan_check_read+0x11/0x20 [ 27.964388] ? do_raw_spin_unlock+0x9e/0x2e0 [ 27.968779] ? __local_bh_enable_ip+0x161/0x230 [ 27.973435] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.978432] ? release_sock+0x1e2/0x2b0 [ 27.982400] ? trace_hardirqs_on+0xd/0x10 [ 27.986529] ? __local_bh_enable_ip+0x161/0x230 [ 27.991181] ? _raw_spin_unlock_bh+0x30/0x40 [ 27.995572] ? release_sock+0x1e2/0x2b0 [ 27.999527] ? __release_sock+0x3a0/0x3a0 [ 28.003656] ? __local_bh_enable_ip+0x161/0x230 [ 28.008308] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 28.013490] ? smc_setsockopt+0x388/0x6e0 [ 28.017622] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.023140] ? __sys_setsockopt+0x24f/0x390 [ 28.027445] do_group_exit+0x16f/0x430 [ 28.031315] ? mm_fault_error+0x380/0x380 [ 28.035456] ? __ia32_sys_exit+0x50/0x50 [ 28.039501] ? do_syscall_64+0x92/0x800 [ 28.043458] __x64_sys_exit_group+0x3e/0x50 [ 28.047761] do_syscall_64+0x1b1/0x800 [ 28.051628] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.056538] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.061453] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.066815] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.071640] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.076816] RIP: 0033:0x43e8d8 [ 28.079991] Code: Bad RIP value. [ 28.083353] RSP: 002b:00007fff43b0e3a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.091044] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 28.098294] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.105543] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.112807] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 28.120055] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 28.127979] Dumping ftrace buffer: [ 28.131604] (ftrace buffer empty) [ 28.135313] Kernel Offset: disabled [ 28.138921] Rebooting in 86400 seconds..