[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.934973] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.535112] random: sshd: uninitialized urandom read (32 bytes read) [ 26.058572] random: sshd: uninitialized urandom read (32 bytes read) [ 26.828068] random: sshd: uninitialized urandom read (32 bytes read) [ 36.340830] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. [ 42.088694] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 42.190501] WARNING: CPU: 1 PID: 4563 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 42.198875] Kernel panic - not syncing: panic_on_warn set ... [ 42.198875] [ 42.206225] CPU: 1 PID: 4563 Comm: syz-executor598 Not tainted 4.17.0-rc3+ #36 [ 42.214717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.224051] Call Trace: [ 42.226627] dump_stack+0x1b9/0x294 [ 42.230241] ? dump_stack_print_info.cold.2+0x52/0x52 [ 42.235624] ? smc_unhash_sk+0x320/0x4a0 [ 42.239673] panic+0x22f/0x4de [ 42.242847] ? add_taint.cold.5+0x16/0x16 [ 42.246977] ? __warn.cold.8+0x148/0x1b3 [ 42.251020] ? __warn.cold.8+0x117/0x1b3 [ 42.255067] ? smc_unhash_sk+0x345/0x4a0 [ 42.259111] __warn.cold.8+0x163/0x1b3 [ 42.262984] ? smc_unhash_sk+0x345/0x4a0 [ 42.267037] report_bug+0x252/0x2d0 [ 42.270654] do_error_trap+0x1de/0x490 [ 42.274525] ? graph_lock+0x170/0x170 [ 42.278315] ? math_error+0x420/0x420 [ 42.282113] ? lock_acquire+0x1dc/0x520 [ 42.286085] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.290916] do_invalid_op+0x1b/0x20 [ 42.294615] invalid_op+0x14/0x20 [ 42.298060] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 42.302721] RSP: 0018:ffff8801d95ef488 EFLAGS: 00010293 [ 42.308070] RAX: ffff8801acb8e340 RBX: ffff8801ac4687c0 RCX: ffffffff873f756e [ 42.315325] RDX: 0000000000000000 RSI: ffffffff873f7625 RDI: 0000000000000005 [ 42.322586] RBP: ffff8801d95ef570 R08: ffff8801acb8e340 R09: ffffed003588d108 [ 42.329840] R10: ffffed003588d108 R11: ffff8801ac468843 R12: 1ffff1003b2bde95 [ 42.337107] R13: ffff8801d95ef548 R14: ffffffff8970b1e0 R15: ffff8801ac468840 [ 42.344381] ? smc_unhash_sk+0x28e/0x4a0 [ 42.348426] ? smc_unhash_sk+0x345/0x4a0 [ 42.352471] ? smc_unhash_sk+0x345/0x4a0 [ 42.356695] ? smc_rx_data_available+0x100/0x100 [ 42.361444] ? release_sock+0x1e2/0x2b0 [ 42.365404] ? __local_bh_enable_ip+0x161/0x230 [ 42.370056] ? __release_sock+0x3a0/0x3a0 [ 42.374191] ? smc_release+0x269/0x610 [ 42.378063] ? trace_hardirqs_on+0xd/0x10 [ 42.382207] ? __local_bh_enable_ip+0x161/0x230 [ 42.386860] smc_release+0x36e/0x610 [ 42.390564] sock_release+0x96/0x1b0 [ 42.394275] ? sock_alloc_file+0x4e0/0x4e0 [ 42.398496] sock_close+0x16/0x20 [ 42.401936] __fput+0x34d/0x890 [ 42.405198] ? fput+0x1a0/0x1a0 [ 42.408464] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.412948] ____fput+0x15/0x20 [ 42.416211] task_work_run+0x1e4/0x290 [ 42.420087] ? task_work_cancel+0x240/0x240 [ 42.424391] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 42.429921] ? switch_task_namespaces+0xa2/0xd0 [ 42.434578] do_exit+0x1aee/0x2730 [ 42.438104] ? mm_update_next_owner+0x980/0x980 [ 42.442760] ? lock_downgrade+0x8e0/0x8e0 [ 42.446888] ? noop_count+0x40/0x40 [ 42.450495] ? lock_pin_lock+0x350/0x350 [ 42.454538] ? kasan_check_read+0x11/0x20 [ 42.458664] ? rcu_is_watching+0x85/0x140 [ 42.462803] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 42.467981] ? is_bpf_text_address+0xd7/0x170 [ 42.472460] ? check_usage_backwards+0x151/0x3a0 [ 42.477203] ? graph_lock+0x170/0x170 [ 42.480996] ? graph_lock+0x170/0x170 [ 42.484786] ? find_held_lock+0x36/0x1c0 [ 42.488833] ? lock_downgrade+0x8e0/0x8e0 [ 42.492973] ? kasan_check_read+0x11/0x20 [ 42.497104] ? do_raw_spin_unlock+0x9e/0x2e0 [ 42.501499] ? __local_bh_enable_ip+0x161/0x230 [ 42.506152] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.511154] ? release_sock+0x1e2/0x2b0 [ 42.515111] ? trace_hardirqs_on+0xd/0x10 [ 42.519245] ? __local_bh_enable_ip+0x161/0x230 [ 42.523910] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.528302] ? release_sock+0x1e2/0x2b0 [ 42.532260] ? __release_sock+0x3a0/0x3a0 [ 42.536404] ? __local_bh_enable_ip+0x161/0x230 [ 42.541062] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 42.546235] ? smc_setsockopt+0x1ed/0x630 [ 42.550371] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.555893] ? __sys_setsockopt+0x24f/0x390 [ 42.560200] do_group_exit+0x16f/0x430 [ 42.564071] ? mm_fault_error+0x380/0x380 [ 42.568201] ? __ia32_sys_exit+0x50/0x50 [ 42.572258] ? do_syscall_64+0x92/0x800 [ 42.576220] __x64_sys_exit_group+0x3e/0x50 [ 42.580525] do_syscall_64+0x1b1/0x800 [ 42.584494] ? syscall_return_slowpath+0x5c0/0x5c0 [ 42.589409] ? syscall_return_slowpath+0x30f/0x5c0 [ 42.594332] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 42.599685] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.604514] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.609685] RIP: 0033:0x43e8b8 [ 42.612856] RSP: 002b:00007ffe7ab309f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 42.620549] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8b8 [ 42.627801] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 42.635051] RBP: 00000000004be260 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 42.642304] R10: 0000000020000a40 R11: 0000000000000246 R12: 0000000000000001 [ 42.649556] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 42.657319] Dumping ftrace buffer: [ 42.660952] (ftrace buffer empty) [ 42.664644] Kernel Offset: disabled [ 42.668254] Rebooting in 86400 seconds..