[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.105224] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.358507] random: sshd: uninitialized urandom read (32 bytes read) [ 20.683074] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.428934] random: sshd: uninitialized urandom read (32 bytes read) [ 21.590391] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. [ 27.032261] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 27.125951] WARNING: CPU: 0 PID: 4548 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 27.134350] Kernel panic - not syncing: panic_on_warn set ... [ 27.134350] [ 27.141700] CPU: 0 PID: 4548 Comm: syz-executor903 Not tainted 4.17.0-rc4+ #45 [ 27.149043] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.158388] Call Trace: [ 27.160964] dump_stack+0x1b9/0x294 [ 27.164573] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.169755] ? smc_unhash_sk+0x330/0x4a0 [ 27.173802] panic+0x22f/0x4de [ 27.176974] ? add_taint.cold.5+0x16/0x16 [ 27.181110] ? __warn.cold.8+0x148/0x1b3 [ 27.185155] ? __warn.cold.8+0x117/0x1b3 [ 27.189211] ? smc_unhash_sk+0x345/0x4a0 [ 27.193256] __warn.cold.8+0x163/0x1b3 [ 27.197133] ? smc_unhash_sk+0x345/0x4a0 [ 27.201178] report_bug+0x252/0x2d0 [ 27.204790] do_error_trap+0x1de/0x490 [ 27.208661] ? graph_lock+0x170/0x170 [ 27.212446] ? math_error+0x420/0x420 [ 27.216236] ? lock_acquire+0x1dc/0x520 [ 27.220204] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.225043] do_invalid_op+0x1b/0x20 [ 27.228752] invalid_op+0x14/0x20 [ 27.232190] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 27.236835] RSP: 0018:ffff8801ace5f488 EFLAGS: 00010293 [ 27.242192] RAX: ffff8801b1522600 RBX: ffff8801ad5517c0 RCX: ffffffff8740565e [ 27.249443] RDX: 0000000000000000 RSI: ffffffff87405715 RDI: 0000000000000005 [ 27.256692] RBP: ffff8801ace5f570 R08: ffff8801b1522600 R09: ffffed0035aaa308 [ 27.263949] R10: ffffed0035aaa308 R11: ffff8801ad551843 R12: 1ffff100359cbe95 [ 27.271211] R13: ffff8801ace5f548 R14: ffffffff8970cba0 R15: ffff8801ad551840 [ 27.278482] ? smc_unhash_sk+0x28e/0x4a0 [ 27.282525] ? smc_unhash_sk+0x345/0x4a0 [ 27.286569] ? smc_unhash_sk+0x345/0x4a0 [ 27.290627] ? smc_rx_data_available+0x100/0x100 [ 27.295368] ? release_sock+0x1e2/0x2b0 [ 27.299328] ? __local_bh_enable_ip+0x161/0x230 [ 27.303977] ? __release_sock+0x3a0/0x3a0 [ 27.308108] ? smc_release+0x269/0x610 [ 27.311978] ? trace_hardirqs_on+0xd/0x10 [ 27.316109] ? __local_bh_enable_ip+0x161/0x230 [ 27.320769] smc_release+0x36e/0x610 [ 27.324468] sock_release+0x96/0x1b0 [ 27.328165] ? sock_alloc_file+0x4e0/0x4e0 [ 27.332383] sock_close+0x16/0x20 [ 27.335820] __fput+0x34d/0x890 [ 27.339082] ? fput+0x1a0/0x1a0 [ 27.342356] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.346835] ____fput+0x15/0x20 [ 27.350106] task_work_run+0x1e4/0x290 [ 27.353976] ? task_work_cancel+0x240/0x240 [ 27.358297] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.363816] ? switch_task_namespaces+0xa2/0xd0 [ 27.368468] do_exit+0x1aee/0x2730 [ 27.371991] ? mm_update_next_owner+0x980/0x980 [ 27.376650] ? lock_downgrade+0x8e0/0x8e0 [ 27.380776] ? noop_count+0x40/0x40 [ 27.384383] ? lock_pin_lock+0x350/0x350 [ 27.388430] ? kasan_check_read+0x11/0x20 [ 27.392558] ? rcu_is_watching+0x85/0x140 [ 27.396688] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 27.401861] ? is_bpf_text_address+0xd7/0x170 [ 27.406338] ? check_usage_backwards+0x151/0x3a0 [ 27.411073] ? graph_lock+0x170/0x170 [ 27.414854] ? graph_lock+0x170/0x170 [ 27.418640] ? find_held_lock+0x36/0x1c0 [ 27.422687] ? lock_downgrade+0x8e0/0x8e0 [ 27.426826] ? kasan_check_read+0x11/0x20 [ 27.430955] ? do_raw_spin_unlock+0x9e/0x2e0 [ 27.435349] ? __local_bh_enable_ip+0x161/0x230 [ 27.439998] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.444995] ? release_sock+0x1e2/0x2b0 [ 27.448956] ? trace_hardirqs_on+0xd/0x10 [ 27.453110] ? __local_bh_enable_ip+0x161/0x230 [ 27.457786] ? _raw_spin_unlock_bh+0x30/0x40 [ 27.462178] ? release_sock+0x1e2/0x2b0 [ 27.466136] ? __release_sock+0x3a0/0x3a0 [ 27.470269] ? __local_bh_enable_ip+0x161/0x230 [ 27.474923] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 27.480104] ? smc_setsockopt+0x1ed/0x630 [ 27.484238] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.489758] ? __sys_setsockopt+0x24f/0x390 [ 27.494070] do_group_exit+0x16f/0x430 [ 27.497946] ? mm_fault_error+0x380/0x380 [ 27.502076] ? __ia32_sys_exit+0x50/0x50 [ 27.506130] ? do_syscall_64+0x92/0x800 [ 27.510091] __x64_sys_exit_group+0x3e/0x50 [ 27.514394] do_syscall_64+0x1b1/0x800 [ 27.518261] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 27.523095] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.528004] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.532918] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.538270] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.543100] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.548269] RIP: 0033:0x43e8d8 [ 27.551447] RSP: 002b:00007ffe955b10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.559145] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 27.566406] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.573658] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.580918] R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000001 [ 27.588180] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.596112] Dumping ftrace buffer: [ 27.599768] (ftrace buffer empty) [ 27.603457] Kernel Offset: disabled [ 27.607067] Rebooting in 86400 seconds..