[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.506770] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.661637] random: sshd: uninitialized urandom read (32 bytes read) [ 19.991043] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0[ 20.739889] random: sshd: uninitialized urandom read (32 bytes read) syzkaller login: [ 20.899194] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. [ 26.477346] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.569841] WARNING: CPU: 1 PID: 4534 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 26.578282] Kernel panic - not syncing: panic_on_warn set ... [ 26.578282] [ 26.585633] CPU: 1 PID: 4534 Comm: syz-executor529 Not tainted 4.17.0-rc3+ #34 [ 26.592970] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.602303] Call Trace: [ 26.604878] dump_stack+0x1b9/0x294 [ 26.608489] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.613665] ? smc_unhash_sk+0x310/0x4a0 [ 26.617709] panic+0x22f/0x4de [ 26.620883] ? add_taint.cold.5+0x16/0x16 [ 26.625028] ? __warn.cold.8+0x148/0x1b3 [ 26.629077] ? __warn.cold.8+0x117/0x1b3 [ 26.633121] ? smc_unhash_sk+0x345/0x4a0 [ 26.637164] __warn.cold.8+0x163/0x1b3 [ 26.641046] ? smc_unhash_sk+0x345/0x4a0 [ 26.645095] report_bug+0x252/0x2d0 [ 26.648707] do_error_trap+0x1de/0x490 [ 26.652576] ? graph_lock+0x170/0x170 [ 26.656364] ? math_error+0x420/0x420 [ 26.660155] ? lock_acquire+0x1dc/0x520 [ 26.664128] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.668956] do_invalid_op+0x1b/0x20 [ 26.672652] invalid_op+0x14/0x20 [ 26.676090] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 26.680747] RSP: 0018:ffff8801ad037488 EFLAGS: 00010293 [ 26.686096] RAX: ffff8801d9574140 RBX: ffff8801d9b5f7c0 RCX: ffffffff87402b7e [ 26.693350] RDX: 0000000000000000 RSI: ffffffff87402c35 RDI: 0000000000000005 [ 26.700603] RBP: ffff8801ad037570 R08: ffff8801d9574140 R09: ffffed003b36bf08 [ 26.707855] R10: ffffed003b36bf08 R11: ffff8801d9b5f843 R12: 1ffff10035a06e95 [ 26.715118] R13: ffff8801ad037548 R14: ffffffff8970e8a0 R15: ffff8801d9b5f840 [ 26.722383] ? smc_unhash_sk+0x28e/0x4a0 [ 26.726439] ? smc_unhash_sk+0x345/0x4a0 [ 26.730482] ? smc_unhash_sk+0x345/0x4a0 [ 26.734527] ? smc_rx_data_available+0x100/0x100 [ 26.739270] ? release_sock+0x1e2/0x2b0 [ 26.743227] ? __local_bh_enable_ip+0x161/0x230 [ 26.747876] ? __release_sock+0x3a0/0x3a0 [ 26.752014] ? smc_release+0x269/0x610 [ 26.755895] ? trace_hardirqs_on+0xd/0x10 [ 26.760036] ? __local_bh_enable_ip+0x161/0x230 [ 26.764691] smc_release+0x36e/0x610 [ 26.768390] sock_release+0x96/0x1b0 [ 26.772103] ? sock_alloc_file+0x4e0/0x4e0 [ 26.776327] sock_close+0x16/0x20 [ 26.779773] __fput+0x34d/0x890 [ 26.783046] ? fput+0x1a0/0x1a0 [ 26.786315] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.790794] ____fput+0x15/0x20 [ 26.794062] task_work_run+0x1e4/0x290 [ 26.797937] ? task_work_cancel+0x240/0x240 [ 26.802263] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.807782] ? switch_task_namespaces+0xa2/0xd0 [ 26.812436] do_exit+0x1aee/0x2730 [ 26.815962] ? mm_update_next_owner+0x980/0x980 [ 26.820615] ? ___sys_sendmsg+0x31a/0x940 [ 26.824744] ? rcu_read_lock_sched_held+0x108/0x120 [ 26.829741] ? kfree+0x1e9/0x260 [ 26.833091] ? ___sys_sendmsg+0x31f/0x940 [ 26.837225] ? copy_msghdr_from_user+0x560/0x560 [ 26.841962] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.846958] ? graph_lock+0x170/0x170 [ 26.850740] ? pud_val+0x80/0xf0 [ 26.854101] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.859621] ? __fget_light+0x2ef/0x430 [ 26.863574] ? __handle_mm_fault+0x93a/0x4310 [ 26.868057] ? fget_raw+0x20/0x20 [ 26.871495] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 26.876232] ? graph_lock+0x170/0x170 [ 26.880038] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 26.885561] ? sockfd_lookup_light+0xc5/0x160 [ 26.890061] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.895588] ? __sys_sendmmsg+0x4b3/0x6f0 [ 26.899724] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 26.904042] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.909565] ? __handle_mm_fault+0x4310/0x4310 [ 26.914135] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.919657] ? __do_page_fault+0x441/0xe40 [ 26.923892] do_group_exit+0x16f/0x430 [ 26.927772] ? mm_fault_error+0x380/0x380 [ 26.931914] ? __ia32_sys_exit+0x50/0x50 [ 26.935963] ? do_syscall_64+0x92/0x800 [ 26.939934] __x64_sys_exit_group+0x3e/0x50 [ 26.944242] do_syscall_64+0x1b1/0x800 [ 26.948114] ? syscall_return_slowpath+0x5c0/0x5c0 [ 26.953035] ? syscall_return_slowpath+0x30f/0x5c0 [ 26.957953] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 26.963324] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.968152] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.973332] RIP: 0033:0x43f038 [ 26.976501] RSP: 002b:00007fff4b4274c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.984195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f038 [ 26.991454] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.998716] RBP: 00000000004bea20 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.005966] R10: 0000000020008014 R11: 0000000000000246 R12: 0000000000000001 [ 27.013227] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.021159] Dumping ftrace buffer: [ 27.024767] (ftrace buffer empty) [ 27.028457] Kernel Offset: disabled [ 27.032074] Rebooting in 86400 seconds..