[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.465893] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.695255] random: sshd: uninitialized urandom read (32 bytes read) [ 23.141650] random: sshd: uninitialized urandom read (32 bytes read) [ 23.898634] random: sshd: uninitialized urandom read (32 bytes read) [ 24.056492] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. [ 29.482157] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.572477] WARNING: CPU: 0 PID: 4485 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 29.580858] Kernel panic - not syncing: panic_on_warn set ... [ 29.580858] [ 29.588213] CPU: 0 PID: 4485 Comm: syz-executor791 Not tainted 4.17.0-rc4+ #54 [ 29.595553] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.604883] Call Trace: [ 29.607452] dump_stack+0x1b9/0x294 [ 29.611072] ? dump_stack_print_info.cold.2+0x52/0x52 [ 29.616253] ? smc_unhash_sk+0x260/0x4a0 [ 29.620292] panic+0x22f/0x4de [ 29.623463] ? add_taint.cold.5+0x16/0x16 [ 29.627592] ? __warn.cold.8+0x148/0x1b3 [ 29.631632] ? __warn.cold.8+0x117/0x1b3 [ 29.635702] ? smc_unhash_sk+0x345/0x4a0 [ 29.639741] __warn.cold.8+0x163/0x1b3 [ 29.643608] ? smc_unhash_sk+0x345/0x4a0 [ 29.647655] report_bug+0x252/0x2d0 [ 29.651264] do_error_trap+0x1de/0x490 [ 29.655135] ? graph_lock+0x170/0x170 [ 29.658914] ? math_error+0x420/0x420 [ 29.662696] ? lock_acquire+0x1dc/0x520 [ 29.666656] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.671480] do_invalid_op+0x1b/0x20 [ 29.675178] invalid_op+0x14/0x20 [ 29.678623] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 29.683264] RSP: 0018:ffff8801ae3af488 EFLAGS: 00010293 [ 29.688608] RAX: ffff8801ad812740 RBX: ffff8801b08e07c0 RCX: ffffffff8740fb2e [ 29.695856] RDX: 0000000000000000 RSI: ffffffff8740fbe5 RDI: 0000000000000005 [ 29.703105] RBP: ffff8801ae3af570 R08: ffff8801ad812740 R09: ffffed003611c108 [ 29.710354] R10: ffffed003611c108 R11: ffff8801b08e0843 R12: 1ffff10035c75e95 [ 29.717602] R13: ffff8801ae3af548 R14: ffffffff8970dc60 R15: ffff8801b08e0840 [ 29.724863] ? smc_unhash_sk+0x28e/0x4a0 [ 29.728906] ? smc_unhash_sk+0x345/0x4a0 [ 29.732949] ? smc_unhash_sk+0x345/0x4a0 [ 29.736992] ? smc_rx_data_available+0x100/0x100 [ 29.741731] ? release_sock+0x1e2/0x2b0 [ 29.745685] ? __local_bh_enable_ip+0x161/0x230 [ 29.750333] ? __release_sock+0x3a0/0x3a0 [ 29.754457] ? smc_release+0x269/0x610 [ 29.758331] ? trace_hardirqs_on+0xd/0x10 [ 29.762461] ? __local_bh_enable_ip+0x161/0x230 [ 29.767113] smc_release+0x36e/0x610 [ 29.770810] sock_release+0x96/0x1b0 [ 29.774504] ? sock_alloc_file+0x4e0/0x4e0 [ 29.778723] sock_close+0x16/0x20 [ 29.782156] __fput+0x34d/0x890 [ 29.785415] ? fput+0x1a0/0x1a0 [ 29.788680] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.793156] ____fput+0x15/0x20 [ 29.796423] task_work_run+0x1e4/0x290 [ 29.800293] ? task_work_cancel+0x240/0x240 [ 29.804605] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 29.810123] ? switch_task_namespaces+0xa2/0xd0 [ 29.814775] do_exit+0x1aee/0x2730 [ 29.818296] ? mm_update_next_owner+0x980/0x980 [ 29.822944] ? lock_downgrade+0x8e0/0x8e0 [ 29.827074] ? noop_count+0x40/0x40 [ 29.830679] ? lock_pin_lock+0x350/0x350 [ 29.834719] ? kasan_check_read+0x11/0x20 [ 29.838843] ? rcu_is_watching+0x85/0x140 [ 29.842971] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 29.848141] ? is_bpf_text_address+0xd7/0x170 [ 29.852615] ? check_usage_backwards+0x151/0x3a0 [ 29.857358] ? graph_lock+0x170/0x170 [ 29.861136] ? graph_lock+0x170/0x170 [ 29.864921] ? find_held_lock+0x36/0x1c0 [ 29.868966] ? lock_downgrade+0x8e0/0x8e0 [ 29.873093] ? kasan_check_read+0x11/0x20 [ 29.877218] ? do_raw_spin_unlock+0x9e/0x2e0 [ 29.881607] ? __local_bh_enable_ip+0x161/0x230 [ 29.886255] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.891250] ? release_sock+0x1e2/0x2b0 [ 29.895202] ? trace_hardirqs_on+0xd/0x10 [ 29.899327] ? __local_bh_enable_ip+0x161/0x230 [ 29.903975] ? _raw_spin_unlock_bh+0x30/0x40 [ 29.908371] ? release_sock+0x1e2/0x2b0 [ 29.912324] ? __release_sock+0x3a0/0x3a0 [ 29.916453] ? __local_bh_enable_ip+0x161/0x230 [ 29.921103] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 29.926272] ? smc_setsockopt+0x1ed/0x6d0 [ 29.930402] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.935916] ? __sys_setsockopt+0x24f/0x390 [ 29.940227] do_group_exit+0x16f/0x430 [ 29.944092] ? mm_fault_error+0x380/0x380 [ 29.948218] ? __ia32_sys_exit+0x50/0x50 [ 29.952260] ? do_syscall_64+0x92/0x800 [ 29.956216] __x64_sys_exit_group+0x3e/0x50 [ 29.960518] do_syscall_64+0x1b1/0x800 [ 29.964389] ? syscall_return_slowpath+0x5c0/0x5c0 [ 29.969298] ? syscall_return_slowpath+0x30f/0x5c0 [ 29.974212] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 29.979560] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.984387] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.989557] RIP: 0033:0x43e8d8 [ 29.992722] RSP: 002b:00007ffe34dbd6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.000408] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 30.007657] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 30.014903] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 30.022152] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 30.029401] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 30.037298] Dumping ftrace buffer: [ 30.040932] (ftrace buffer empty) [ 30.044621] Kernel Offset: disabled [ 30.048226] Rebooting in 86400 seconds..