[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.548219] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.753099] random: sshd: uninitialized urandom read (32 bytes read) [ 20.141463] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.890382] random: sshd: uninitialized urandom read (32 bytes read) [ 21.046433] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. [ 26.520057] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.609362] WARNING: CPU: 1 PID: 4510 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 26.617727] Kernel panic - not syncing: panic_on_warn set ... [ 26.617727] [ 26.625076] CPU: 1 PID: 4510 Comm: syz-executor413 Not tainted 4.17.0-rc3+ #33 [ 26.632410] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.641741] Call Trace: [ 26.644309] dump_stack+0x1b9/0x294 [ 26.647917] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.653092] ? smc_unhash_sk+0x270/0x4a0 [ 26.657136] panic+0x22f/0x4de [ 26.660308] ? add_taint.cold.5+0x16/0x16 [ 26.664439] ? __warn.cold.8+0x148/0x1b3 [ 26.668477] ? __warn.cold.8+0x117/0x1b3 [ 26.672519] ? smc_unhash_sk+0x345/0x4a0 [ 26.676566] __warn.cold.8+0x163/0x1b3 [ 26.680432] ? smc_unhash_sk+0x345/0x4a0 [ 26.684478] report_bug+0x252/0x2d0 [ 26.688098] do_error_trap+0x1de/0x490 [ 26.691967] ? graph_lock+0x170/0x170 [ 26.695746] ? math_error+0x420/0x420 [ 26.699531] ? lock_acquire+0x1dc/0x520 [ 26.703506] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.708329] do_invalid_op+0x1b/0x20 [ 26.712030] invalid_op+0x14/0x20 [ 26.715466] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 26.720109] RSP: 0018:ffff8801b09af488 EFLAGS: 00010293 [ 26.725459] RAX: ffff8801d94fa580 RBX: ffff8801acbba7c0 RCX: ffffffff873fe71e [ 26.732707] RDX: 0000000000000000 RSI: ffffffff873fe7d5 RDI: 0000000000000005 [ 26.739955] RBP: ffff8801b09af570 R08: ffff8801d94fa580 R09: ffffed0035977508 [ 26.747202] R10: ffffed0035977508 R11: ffff8801acbba843 R12: 1ffff10036135e95 [ 26.754450] R13: ffff8801b09af548 R14: ffffffff8970e4e0 R15: ffff8801acbba840 [ 26.761710] ? smc_unhash_sk+0x28e/0x4a0 [ 26.765748] ? smc_unhash_sk+0x345/0x4a0 [ 26.769798] ? smc_unhash_sk+0x345/0x4a0 [ 26.773840] ? smc_rx_data_available+0x100/0x100 [ 26.778579] ? release_sock+0x1e2/0x2b0 [ 26.782538] ? __local_bh_enable_ip+0x161/0x230 [ 26.787185] ? __release_sock+0x3a0/0x3a0 [ 26.791312] ? smc_release+0x269/0x610 [ 26.795177] ? trace_hardirqs_on+0xd/0x10 [ 26.799304] ? __local_bh_enable_ip+0x161/0x230 [ 26.803956] smc_release+0x36e/0x610 [ 26.807653] sock_release+0x96/0x1b0 [ 26.811345] ? sock_alloc_file+0x4e0/0x4e0 [ 26.815562] sock_close+0x16/0x20 [ 26.818995] __fput+0x34d/0x890 [ 26.822260] ? fput+0x1a0/0x1a0 [ 26.825518] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.830000] ____fput+0x15/0x20 [ 26.833266] task_work_run+0x1e4/0x290 [ 26.837132] ? task_work_cancel+0x240/0x240 [ 26.841435] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.846952] ? switch_task_namespaces+0xa2/0xd0 [ 26.851602] do_exit+0x1aee/0x2730 [ 26.855127] ? mm_update_next_owner+0x980/0x980 [ 26.859775] ? lock_downgrade+0x8e0/0x8e0 [ 26.863905] ? noop_count+0x40/0x40 [ 26.867512] ? lock_pin_lock+0x350/0x350 [ 26.871558] ? kasan_check_read+0x11/0x20 [ 26.875687] ? rcu_is_watching+0x85/0x140 [ 26.879819] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 26.884991] ? is_bpf_text_address+0xd7/0x170 [ 26.889480] ? check_usage_backwards+0x151/0x3a0 [ 26.894215] ? graph_lock+0x170/0x170 [ 26.897992] ? graph_lock+0x170/0x170 [ 26.901781] ? find_held_lock+0x36/0x1c0 [ 26.905827] ? lock_downgrade+0x8e0/0x8e0 [ 26.909958] ? kasan_check_read+0x11/0x20 [ 26.914087] ? do_raw_spin_unlock+0x9e/0x2e0 [ 26.918477] ? __local_bh_enable_ip+0x161/0x230 [ 26.923141] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.928144] ? release_sock+0x1e2/0x2b0 [ 26.932097] ? trace_hardirqs_on+0xd/0x10 [ 26.936232] ? __local_bh_enable_ip+0x161/0x230 [ 26.940881] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.945270] ? release_sock+0x1e2/0x2b0 [ 26.949222] ? __release_sock+0x3a0/0x3a0 [ 26.953348] ? __local_bh_enable_ip+0x161/0x230 [ 26.957996] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 26.963171] ? smc_setsockopt+0x1ed/0x630 [ 26.967301] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.972818] ? __sys_setsockopt+0x24f/0x390 [ 26.977123] do_group_exit+0x16f/0x430 [ 26.980989] ? mm_fault_error+0x380/0x380 [ 26.985121] ? __ia32_sys_exit+0x50/0x50 [ 26.989163] ? do_syscall_64+0x92/0x800 [ 26.993119] __x64_sys_exit_group+0x3e/0x50 [ 26.997418] do_syscall_64+0x1b1/0x800 [ 27.001284] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.006194] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.011105] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.016457] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.021280] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.026448] RIP: 0033:0x43e8d8 [ 27.029615] RSP: 002b:00007ffcb3ea4b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.037304] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 27.044553] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.051802] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.059055] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 27.066314] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.074153] Dumping ftrace buffer: [ 27.077775] (ftrace buffer empty) [ 27.081462] Kernel Offset: disabled [ 27.085069] Rebooting in 86400 seconds..