[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.696441] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.548235] random: sshd: uninitialized urandom read (32 bytes read) [ 23.889574] random: sshd: uninitialized urandom read (32 bytes read) [ 24.648438] random: sshd: uninitialized urandom read (32 bytes read) [ 32.983356] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.41' (ECDSA) to the list of known hosts. [ 38.681818] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 38.771564] WARNING: CPU: 1 PID: 4510 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 38.779957] Kernel panic - not syncing: panic_on_warn set ... [ 38.779957] [ 38.787313] CPU: 1 PID: 4510 Comm: syz-executor328 Not tainted 4.17.0-rc4+ #41 [ 38.794657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.804001] Call Trace: [ 38.806592] dump_stack+0x1b9/0x294 [ 38.810210] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.815385] ? smc_unhash_sk+0x2d0/0x4a0 [ 38.819427] panic+0x22f/0x4de [ 38.822601] ? add_taint.cold.5+0x16/0x16 [ 38.826731] ? __warn.cold.8+0x148/0x1b3 [ 38.830771] ? __warn.cold.8+0x117/0x1b3 [ 38.834815] ? smc_unhash_sk+0x345/0x4a0 [ 38.838857] __warn.cold.8+0x163/0x1b3 [ 38.842726] ? smc_unhash_sk+0x345/0x4a0 [ 38.846769] report_bug+0x252/0x2d0 [ 38.850378] do_error_trap+0x1de/0x490 [ 38.854247] ? graph_lock+0x170/0x170 [ 38.858030] ? math_error+0x420/0x420 [ 38.861820] ? lock_acquire+0x1dc/0x520 [ 38.865781] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.870611] do_invalid_op+0x1b/0x20 [ 38.874317] invalid_op+0x14/0x20 [ 38.877757] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 38.882405] RSP: 0018:ffff8801acc8f488 EFLAGS: 00010293 [ 38.887755] RAX: ffff8801aee14180 RBX: ffff8801d95a17c0 RCX: ffffffff87404cbe [ 38.895007] RDX: 0000000000000000 RSI: ffffffff87404d75 RDI: 0000000000000005 [ 38.902274] RBP: ffff8801acc8f570 R08: ffff8801aee14180 R09: ffffed003b2b4308 [ 38.909525] R10: ffffed003b2b4308 R11: ffff8801d95a1843 R12: 1ffff10035991e95 [ 38.916775] R13: ffff8801acc8f548 R14: ffffffff8970cc20 R15: ffff8801d95a1840 [ 38.924038] ? smc_unhash_sk+0x28e/0x4a0 [ 38.928078] ? smc_unhash_sk+0x345/0x4a0 [ 38.932128] ? smc_unhash_sk+0x345/0x4a0 [ 38.936179] ? smc_rx_data_available+0x100/0x100 [ 38.940917] ? release_sock+0x1e2/0x2b0 [ 38.944873] ? __local_bh_enable_ip+0x161/0x230 [ 38.949526] ? __release_sock+0x3a0/0x3a0 [ 38.953660] ? smc_release+0x269/0x610 [ 38.957531] ? trace_hardirqs_on+0xd/0x10 [ 38.961665] ? __local_bh_enable_ip+0x161/0x230 [ 38.966318] smc_release+0x36e/0x610 [ 38.970018] sock_release+0x96/0x1b0 [ 38.973715] ? sock_alloc_file+0x4e0/0x4e0 [ 38.977927] sock_close+0x16/0x20 [ 38.981448] __fput+0x34d/0x890 [ 38.984709] ? fput+0x1a0/0x1a0 [ 38.987969] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.992442] ____fput+0x15/0x20 [ 38.995701] task_work_run+0x1e4/0x290 [ 38.999570] ? task_work_cancel+0x240/0x240 [ 39.003892] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 39.009407] ? switch_task_namespaces+0xa2/0xd0 [ 39.014064] do_exit+0x1aee/0x2730 [ 39.017591] ? mm_update_next_owner+0x980/0x980 [ 39.022244] ? find_held_lock+0x36/0x1c0 [ 39.026289] ? lock_downgrade+0x8e0/0x8e0 [ 39.030413] ? lock_downgrade+0x8e0/0x8e0 [ 39.034543] ? kasan_check_read+0x11/0x20 [ 39.038672] ? do_raw_spin_unlock+0x9e/0x2e0 [ 39.043060] ? __local_bh_enable_ip+0x161/0x230 [ 39.047710] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.052709] ? release_sock+0x1e2/0x2b0 [ 39.056662] ? trace_hardirqs_on+0xd/0x10 [ 39.060789] ? __local_bh_enable_ip+0x161/0x230 [ 39.065439] ? _raw_spin_unlock_bh+0x30/0x40 [ 39.069829] ? release_sock+0x1e2/0x2b0 [ 39.073783] ? __release_sock+0x3a0/0x3a0 [ 39.077912] ? __local_bh_enable_ip+0x161/0x230 [ 39.082563] ? lock_sock_nested+0xe7/0x120 [ 39.086779] ? smc_sendmsg+0x2d5/0x370 [ 39.090645] ? smc_sendpage+0x1a0/0x1a0 [ 39.094600] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.100217] ? sock_sendmsg+0x5a/0x120 [ 39.104085] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.109602] ? __sys_sendto+0x475/0x670 [ 39.113555] ? __ia32_sys_getpeername+0xb0/0xb0 [ 39.118213] ? lock_downgrade+0x8e0/0x8e0 [ 39.122340] ? handle_mm_fault+0x8c0/0xc70 [ 39.126555] ? handle_mm_fault+0x55a/0xc70 [ 39.130775] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.136294] do_group_exit+0x16f/0x430 [ 39.140164] ? mm_fault_error+0x380/0x380 [ 39.144292] ? __ia32_sys_exit+0x50/0x50 [ 39.148341] ? do_syscall_64+0x92/0x800 [ 39.152296] __x64_sys_exit_group+0x3e/0x50 [ 39.156598] do_syscall_64+0x1b1/0x800 [ 39.160466] ? syscall_return_slowpath+0x5c0/0x5c0 [ 39.165380] ? syscall_return_slowpath+0x30f/0x5c0 [ 39.170292] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 39.175729] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.180552] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.185721] RIP: 0033:0x43e918 [ 39.188888] RSP: 002b:00007ffd604117b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 39.196576] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e918 [ 39.203827] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 39.211081] RBP: 00000000004be2c0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 39.218333] R10: 0000000024000080 R11: 0000000000000246 R12: 0000000000000001 [ 39.225587] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 39.233388] Dumping ftrace buffer: [ 39.237019] (ftrace buffer empty) [ 39.240713] Kernel Offset: disabled [ 39.244327] Rebooting in 86400 seconds..