[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.546389] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.104725] random: sshd: uninitialized urandom read (32 bytes read) [ 19.454605] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.348575] random: sshd: uninitialized urandom read (32 bytes read) [ 20.518078] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 26.072770] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.174773] WARNING: CPU: 0 PID: 4529 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 26.183273] Kernel panic - not syncing: panic_on_warn set ... [ 26.183273] [ 26.190651] CPU: 0 PID: 4529 Comm: syz-executor966 Not tainted 4.18.0-rc5+ #153 [ 26.198088] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.207426] Call Trace: [ 26.210033] dump_stack+0x1c9/0x2b4 [ 26.213660] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.218851] panic+0x238/0x4e7 [ 26.222039] ? add_taint.cold.5+0x16/0x16 [ 26.226192] ? __warn.cold.8+0x148/0x1ba [ 26.230249] ? __warn.cold.8+0x117/0x1ba [ 26.234304] ? smc_unhash_sk+0x357/0x4b0 [ 26.238353] __warn.cold.8+0x163/0x1ba [ 26.242227] ? smc_unhash_sk+0x357/0x4b0 [ 26.246303] report_bug+0x252/0x2d0 [ 26.249923] do_error_trap+0x1fc/0x4d0 [ 26.253817] ? math_error+0x3e0/0x3e0 [ 26.257620] ? print_usage_bug+0xc0/0xc0 [ 26.261765] ? lock_acquire+0x1e4/0x540 [ 26.265738] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.270569] do_invalid_op+0x1b/0x20 [ 26.274279] invalid_op+0x14/0x20 [ 26.277738] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 26.282385] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c9 52 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 b3 31 58 fa [ 26.301564] RSP: 0018:ffff8801b1927480 EFLAGS: 00010293 [ 26.306934] RAX: ffff8801ab8fe140 RBX: ffff8801ac0450c0 RCX: ffffffff8761b7f6 [ 26.314188] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 26.321452] RBP: ffff8801b1927568 R08: ffff8801ab8fe140 R09: ffffed0035808a28 [ 26.328703] R10: ffffed0035808a28 R11: ffff8801ac045143 R12: 1ffff10036324e94 [ 26.335960] R13: ffff8801b1927540 R14: ffffffff89937480 R15: ffff8801ac045140 [ 26.343233] ? smc_unhash_sk+0x296/0x4b0 [ 26.347276] ? smc_unhash_sk+0x357/0x4b0 [ 26.351323] ? smc_rx_data_available+0x120/0x120 [ 26.356065] ? release_sock+0x1ec/0x2c0 [ 26.360023] ? __local_bh_enable_ip+0x161/0x230 [ 26.364676] ? __release_sock+0x3a0/0x3a0 [ 26.368806] ? smc_release+0x2c9/0x670 [ 26.372677] ? trace_hardirqs_on+0xd/0x10 [ 26.376809] ? __local_bh_enable_ip+0x161/0x230 [ 26.381466] smc_release+0x3cf/0x670 [ 26.385177] __sock_release+0xd7/0x260 [ 26.389056] ? __sock_release+0x260/0x260 [ 26.393187] sock_close+0x19/0x20 [ 26.396626] __fput+0x355/0x8b0 [ 26.399890] ? fput+0x1a0/0x1a0 [ 26.403677] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.408163] ____fput+0x15/0x20 [ 26.411427] task_work_run+0x1ec/0x2a0 [ 26.415296] ? task_work_cancel+0x250/0x250 [ 26.419611] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.425130] ? switch_task_namespaces+0xa2/0xd0 [ 26.429786] do_exit+0x1b08/0x2750 [ 26.433334] ? mm_update_next_owner+0x9a0/0x9a0 [ 26.437995] ? lock_pin_lock+0x350/0x350 [ 26.442051] ? kasan_check_read+0x11/0x20 [ 26.446182] ? rcu_is_watching+0x8c/0x150 [ 26.450312] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 26.454706] ? check_usage_backwards+0x164/0x3d0 [ 26.459443] ? print_shortest_lock_dependencies+0x80/0x80 [ 26.464961] ? unwind_get_return_address+0x61/0xa0 [ 26.469871] ? graph_lock+0x170/0x170 [ 26.473650] ? graph_lock+0x170/0x170 [ 26.477439] ? find_held_lock+0x36/0x1c0 [ 26.481487] ? lock_downgrade+0x8f0/0x8f0 [ 26.485627] ? kasan_check_read+0x11/0x20 [ 26.489763] ? do_raw_spin_unlock+0xa7/0x2f0 [ 26.494162] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.499164] ? release_sock+0x1ec/0x2c0 [ 26.503121] ? trace_hardirqs_on+0xd/0x10 [ 26.507261] ? __local_bh_enable_ip+0x161/0x230 [ 26.511921] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.516311] ? release_sock+0x1ec/0x2c0 [ 26.520267] ? __release_sock+0x3a0/0x3a0 [ 26.524410] ? __local_bh_enable_ip+0x161/0x230 [ 26.529077] ? smc_setsockopt+0x388/0x6e0 [ 26.533230] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.538758] ? __sys_setsockopt+0x257/0x3b0 [ 26.543078] do_group_exit+0x177/0x440 [ 26.546947] ? mm_fault_error+0x380/0x380 [ 26.551074] ? __ia32_sys_exit+0x50/0x50 [ 26.555116] ? security_file_fcntl+0x94/0xc0 [ 26.559508] ? do_syscall_64+0x9a/0x820 [ 26.563463] __x64_sys_exit_group+0x3e/0x50 [ 26.567764] do_syscall_64+0x1b9/0x820 [ 26.571633] ? syscall_return_slowpath+0x5e0/0x5e0 [ 26.576544] ? syscall_return_slowpath+0x31d/0x5e0 [ 26.581461] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 26.586826] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.591659] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.596830] RIP: 0033:0x43ec98 [ 26.599999] Code: Bad RIP value. [ 26.603368] RSP: 002b:00007ffcd2971298 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.611057] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec98 [ 26.618311] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.625577] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.632857] R10: 0000000020000180 R11: 0000000000000246 R12: 0000000000000001 [ 26.640113] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 26.648146] Dumping ftrace buffer: [ 26.651841] (ftrace buffer empty) [ 26.655534] Kernel Offset: disabled [ 26.659150] Rebooting in 86400 seconds..