[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.252244] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.863158] random: sshd: uninitialized urandom read (32 bytes read) [ 20.178782] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.947440] random: sshd: uninitialized urandom read (32 bytes read) [ 21.107501] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.47' (ECDSA) to the list of known hosts. [ 26.553825] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.643875] WARNING: CPU: 1 PID: 4492 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 26.652258] Kernel panic - not syncing: panic_on_warn set ... [ 26.652258] [ 26.659606] CPU: 1 PID: 4492 Comm: syz-executor597 Not tainted 4.17.0-rc3+ #36 [ 26.666947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.676299] Call Trace: [ 26.678875] dump_stack+0x1b9/0x294 [ 26.682491] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.687663] ? smc_unhash_sk+0x320/0x4a0 [ 26.691705] panic+0x22f/0x4de [ 26.694882] ? add_taint.cold.5+0x16/0x16 [ 26.699015] ? __warn.cold.8+0x148/0x1b3 [ 26.703071] ? __warn.cold.8+0x117/0x1b3 [ 26.707113] ? smc_unhash_sk+0x345/0x4a0 [ 26.711160] __warn.cold.8+0x163/0x1b3 [ 26.715037] ? smc_unhash_sk+0x345/0x4a0 [ 26.719090] report_bug+0x252/0x2d0 [ 26.722705] do_error_trap+0x1de/0x490 [ 26.726572] ? graph_lock+0x170/0x170 [ 26.730351] ? math_error+0x420/0x420 [ 26.734143] ? lock_acquire+0x1dc/0x520 [ 26.738102] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.742926] do_invalid_op+0x1b/0x20 [ 26.746619] invalid_op+0x14/0x20 [ 26.750053] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 26.754695] RSP: 0018:ffff8801ac6a7488 EFLAGS: 00010293 [ 26.760045] RAX: ffff8801af0506c0 RBX: ffff8801d97267c0 RCX: ffffffff873f756e [ 26.767300] RDX: 0000000000000000 RSI: ffffffff873f7625 RDI: 0000000000000005 [ 26.774549] RBP: ffff8801ac6a7570 R08: ffff8801af0506c0 R09: ffffed003b2e4d08 [ 26.781798] R10: ffffed003b2e4d08 R11: ffff8801d9726843 R12: 1ffff100358d4e95 [ 26.789052] R13: ffff8801ac6a7548 R14: ffffffff8970b1e0 R15: ffff8801d9726840 [ 26.796322] ? smc_unhash_sk+0x28e/0x4a0 [ 26.800365] ? smc_unhash_sk+0x345/0x4a0 [ 26.804406] ? smc_unhash_sk+0x345/0x4a0 [ 26.808460] ? smc_rx_data_available+0x100/0x100 [ 26.813200] ? release_sock+0x1e2/0x2b0 [ 26.817158] ? __local_bh_enable_ip+0x161/0x230 [ 26.821816] ? __release_sock+0x3a0/0x3a0 [ 26.825943] ? smc_release+0x269/0x610 [ 26.829811] ? trace_hardirqs_on+0xd/0x10 [ 26.833947] ? __local_bh_enable_ip+0x161/0x230 [ 26.838602] smc_release+0x36e/0x610 [ 26.842301] sock_release+0x96/0x1b0 [ 26.845996] ? sock_alloc_file+0x4e0/0x4e0 [ 26.850218] sock_close+0x16/0x20 [ 26.853655] __fput+0x34d/0x890 [ 26.856917] ? fput+0x1a0/0x1a0 [ 26.860179] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.864655] ____fput+0x15/0x20 [ 26.867913] task_work_run+0x1e4/0x290 [ 26.871784] ? task_work_cancel+0x240/0x240 [ 26.876091] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.881607] ? switch_task_namespaces+0xa2/0xd0 [ 26.886273] do_exit+0x1aee/0x2730 [ 26.889795] ? mm_update_next_owner+0x980/0x980 [ 26.894444] ? lock_downgrade+0x8e0/0x8e0 [ 26.898570] ? noop_count+0x40/0x40 [ 26.902179] ? lock_pin_lock+0x350/0x350 [ 26.906224] ? kasan_check_read+0x11/0x20 [ 26.910354] ? rcu_is_watching+0x85/0x140 [ 26.914497] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 26.919671] ? is_bpf_text_address+0xd7/0x170 [ 26.924148] ? check_usage_backwards+0x151/0x3a0 [ 26.928892] ? graph_lock+0x170/0x170 [ 26.932671] ? graph_lock+0x170/0x170 [ 26.936459] ? find_held_lock+0x36/0x1c0 [ 26.940503] ? lock_downgrade+0x8e0/0x8e0 [ 26.944632] ? kasan_check_read+0x11/0x20 [ 26.948763] ? do_raw_spin_unlock+0x9e/0x2e0 [ 26.953151] ? __local_bh_enable_ip+0x161/0x230 [ 26.957801] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.962796] ? release_sock+0x1e2/0x2b0 [ 26.966750] ? trace_hardirqs_on+0xd/0x10 [ 26.970876] ? __local_bh_enable_ip+0x161/0x230 [ 26.975533] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.979921] ? release_sock+0x1e2/0x2b0 [ 26.983875] ? __release_sock+0x3a0/0x3a0 [ 26.988008] ? __local_bh_enable_ip+0x161/0x230 [ 26.992668] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 26.997840] ? smc_setsockopt+0x1ed/0x630 [ 27.001974] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.007494] ? __sys_setsockopt+0x24f/0x390 [ 27.011799] do_group_exit+0x16f/0x430 [ 27.015670] ? mm_fault_error+0x380/0x380 [ 27.019797] ? __ia32_sys_exit+0x50/0x50 [ 27.023839] ? do_syscall_64+0x92/0x800 [ 27.027797] __x64_sys_exit_group+0x3e/0x50 [ 27.032099] do_syscall_64+0x1b1/0x800 [ 27.035968] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.040877] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.045791] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.051139] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.055965] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.061135] RIP: 0033:0x43e8d8 [ 27.064302] RSP: 002b:00007ffe86591808 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.071991] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 27.079244] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.086492] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.093744] R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000001 [ 27.100993] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.108833] Dumping ftrace buffer: [ 27.112456] (ftrace buffer empty) [ 27.116148] Kernel Offset: disabled [ 27.119754] Rebooting in 86400 seconds..