[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.463980] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.332881] random: sshd: uninitialized urandom read (32 bytes read) [ 24.745919] random: sshd: uninitialized urandom read (32 bytes read) [ 25.478109] random: sshd: uninitialized urandom read (32 bytes read) [ 39.411142] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.54' (ECDSA) to the list of known hosts. [ 44.815635] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 44.901221] WARNING: CPU: 1 PID: 4495 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 44.909598] Kernel panic - not syncing: panic_on_warn set ... [ 44.909598] [ 44.916939] CPU: 1 PID: 4495 Comm: syz-executor792 Not tainted 4.17.0-rc4+ #46 [ 44.924270] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.933599] Call Trace: [ 44.936170] dump_stack+0x1b9/0x294 [ 44.939776] ? dump_stack_print_info.cold.2+0x52/0x52 [ 44.944959] ? smc_unhash_sk+0x330/0x4a0 [ 44.949003] panic+0x22f/0x4de [ 44.952179] ? add_taint.cold.5+0x16/0x16 [ 44.956309] ? __warn.cold.8+0x148/0x1b3 [ 44.960359] ? __warn.cold.8+0x117/0x1b3 [ 44.964406] ? smc_unhash_sk+0x345/0x4a0 [ 44.968447] __warn.cold.8+0x163/0x1b3 [ 44.972312] ? smc_unhash_sk+0x345/0x4a0 [ 44.976354] report_bug+0x252/0x2d0 [ 44.979965] do_error_trap+0x1de/0x490 [ 44.983830] ? graph_lock+0x170/0x170 [ 44.987611] ? math_error+0x420/0x420 [ 44.991400] ? lock_acquire+0x1dc/0x520 [ 44.995357] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.000196] do_invalid_op+0x1b/0x20 [ 45.003889] invalid_op+0x14/0x20 [ 45.007323] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 45.011967] RSP: 0018:ffff8801ad4cf488 EFLAGS: 00010293 [ 45.017309] RAX: ffff8801d9bfa300 RBX: ffff8801d90607c0 RCX: ffffffff8740565e [ 45.024557] RDX: 0000000000000000 RSI: ffffffff87405715 RDI: 0000000000000005 [ 45.031808] RBP: ffff8801ad4cf570 R08: ffff8801d9bfa300 R09: ffffed003b20c108 [ 45.039056] R10: ffffed003b20c108 R11: ffff8801d9060843 R12: 1ffff10035a99e95 [ 45.046304] R13: ffff8801ad4cf548 R14: ffffffff8970cba0 R15: ffff8801d9060840 [ 45.053561] ? smc_unhash_sk+0x28e/0x4a0 [ 45.057601] ? smc_unhash_sk+0x345/0x4a0 [ 45.061640] ? smc_unhash_sk+0x345/0x4a0 [ 45.065680] ? smc_rx_data_available+0x100/0x100 [ 45.070419] ? release_sock+0x1e2/0x2b0 [ 45.074379] ? __local_bh_enable_ip+0x161/0x230 [ 45.079025] ? __release_sock+0x3a0/0x3a0 [ 45.083151] ? smc_release+0x269/0x610 [ 45.087019] ? trace_hardirqs_on+0xd/0x10 [ 45.091148] ? __local_bh_enable_ip+0x161/0x230 [ 45.095798] smc_release+0x36e/0x610 [ 45.099496] sock_release+0x96/0x1b0 [ 45.103191] ? sock_alloc_file+0x4e0/0x4e0 [ 45.107411] sock_close+0x16/0x20 [ 45.110845] __fput+0x34d/0x890 [ 45.114103] ? fput+0x1a0/0x1a0 [ 45.117367] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.121843] ____fput+0x15/0x20 [ 45.125100] task_work_run+0x1e4/0x290 [ 45.128983] ? task_work_cancel+0x240/0x240 [ 45.133286] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.138803] ? switch_task_namespaces+0xa2/0xd0 [ 45.143453] do_exit+0x1aee/0x2730 [ 45.146976] ? mm_update_next_owner+0x980/0x980 [ 45.151714] ? find_held_lock+0x36/0x1c0 [ 45.155755] ? lock_downgrade+0x8e0/0x8e0 [ 45.159882] ? lock_downgrade+0x8e0/0x8e0 [ 45.164013] ? kasan_check_read+0x11/0x20 [ 45.168141] ? do_raw_spin_unlock+0x9e/0x2e0 [ 45.172530] ? __local_bh_enable_ip+0x161/0x230 [ 45.177179] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.182176] ? release_sock+0x1e2/0x2b0 [ 45.186127] ? trace_hardirqs_on+0xd/0x10 [ 45.190253] ? __local_bh_enable_ip+0x161/0x230 [ 45.194900] ? _raw_spin_unlock_bh+0x30/0x40 [ 45.199286] ? release_sock+0x1e2/0x2b0 [ 45.203235] ? __release_sock+0x3a0/0x3a0 [ 45.207364] ? __local_bh_enable_ip+0x161/0x230 [ 45.212012] ? lock_sock_nested+0xe7/0x120 [ 45.216228] ? smc_sendmsg+0x2d5/0x370 [ 45.220091] ? smc_sendpage+0x1a0/0x1a0 [ 45.224046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.229557] ? sock_sendmsg+0x5a/0x120 [ 45.233422] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.238937] ? __sys_sendto+0x475/0x670 [ 45.242895] ? __ia32_sys_getpeername+0xb0/0xb0 [ 45.247545] ? lock_downgrade+0x8e0/0x8e0 [ 45.251671] ? handle_mm_fault+0x8c0/0xc70 [ 45.255888] ? handle_mm_fault+0x55a/0xc70 [ 45.260110] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.265628] do_group_exit+0x16f/0x430 [ 45.269495] ? __ia32_sys_exit+0x50/0x50 [ 45.273538] ? do_syscall_64+0x92/0x800 [ 45.277494] __x64_sys_exit_group+0x3e/0x50 [ 45.281798] do_syscall_64+0x1b1/0x800 [ 45.285668] ? syscall_return_slowpath+0x5c0/0x5c0 [ 45.290580] ? syscall_return_slowpath+0x30f/0x5c0 [ 45.295493] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 45.300842] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.305670] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.310837] RIP: 0033:0x43e8e8 [ 45.314007] RSP: 002b:00007fffef8e3fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.321694] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8e8 [ 45.328941] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.336190] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.343440] R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000001 [ 45.350690] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 45.358499] Dumping ftrace buffer: [ 45.362120] (ftrace buffer empty) [ 45.365811] Kernel Offset: disabled [ 45.369424] Rebooting in 86400 seconds..