[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.406360] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.871464] random: sshd: uninitialized urandom read (32 bytes read) [ 20.123862] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.927651] random: sshd: uninitialized urandom read (32 bytes read) [ 21.093384] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. [ 26.570389] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.659103] WARNING: CPU: 1 PID: 4518 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 26.667495] Kernel panic - not syncing: panic_on_warn set ... [ 26.667495] [ 26.674842] CPU: 1 PID: 4518 Comm: syz-executor124 Not tainted 4.17.0-rc4+ #55 [ 26.682178] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.691509] Call Trace: [ 26.694082] dump_stack+0x1b9/0x294 [ 26.697690] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.702862] ? smc_unhash_sk+0x340/0x4a0 [ 26.706908] panic+0x22f/0x4de [ 26.710080] ? add_taint.cold.5+0x16/0x16 [ 26.714208] ? __warn.cold.8+0x148/0x1b3 [ 26.718248] ? __warn.cold.8+0x117/0x1b3 [ 26.722293] ? smc_unhash_sk+0x345/0x4a0 [ 26.726336] __warn.cold.8+0x163/0x1b3 [ 26.730205] ? smc_unhash_sk+0x345/0x4a0 [ 26.734251] report_bug+0x252/0x2d0 [ 26.737866] do_error_trap+0x1de/0x490 [ 26.741736] ? graph_lock+0x170/0x170 [ 26.745516] ? math_error+0x420/0x420 [ 26.749301] ? lock_acquire+0x1dc/0x520 [ 26.753260] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.758081] do_invalid_op+0x1b/0x20 [ 26.761775] invalid_op+0x14/0x20 [ 26.765210] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 26.769855] RSP: 0018:ffff8801ac9b7488 EFLAGS: 00010293 [ 26.775200] RAX: ffff8801af2865c0 RBX: ffff8801acf507c0 RCX: ffffffff8740fd4e [ 26.782448] RDX: 0000000000000000 RSI: ffffffff8740fe05 RDI: 0000000000000005 [ 26.789695] RBP: ffff8801ac9b7570 R08: ffff8801af2865c0 R09: ffffed00359ea108 [ 26.796944] R10: ffffed00359ea108 R11: ffff8801acf50843 R12: 1ffff10035936e95 [ 26.804193] R13: ffff8801ac9b7548 R14: ffffffff8970dd60 R15: ffff8801acf50840 [ 26.811451] ? smc_unhash_sk+0x28e/0x4a0 [ 26.815491] ? smc_unhash_sk+0x345/0x4a0 [ 26.819532] ? smc_unhash_sk+0x345/0x4a0 [ 26.823575] ? smc_rx_data_available+0x100/0x100 [ 26.828313] ? release_sock+0x1e2/0x2b0 [ 26.832273] ? __local_bh_enable_ip+0x161/0x230 [ 26.836920] ? __release_sock+0x3a0/0x3a0 [ 26.841045] ? smc_release+0x269/0x610 [ 26.844913] ? trace_hardirqs_on+0xd/0x10 [ 26.849040] ? __local_bh_enable_ip+0x161/0x230 [ 26.853689] smc_release+0x36e/0x610 [ 26.857386] sock_release+0x96/0x1b0 [ 26.861078] ? sock_alloc_file+0x4e0/0x4e0 [ 26.865298] sock_close+0x16/0x20 [ 26.868739] __fput+0x34d/0x890 [ 26.871997] ? fput+0x1a0/0x1a0 [ 26.875267] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.879743] ____fput+0x15/0x20 [ 26.883002] task_work_run+0x1e4/0x290 [ 26.886871] ? task_work_cancel+0x240/0x240 [ 26.891178] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.896695] ? switch_task_namespaces+0xa2/0xd0 [ 26.901348] do_exit+0x1aee/0x2730 [ 26.904872] ? mm_update_next_owner+0x980/0x980 [ 26.909526] ? find_held_lock+0x36/0x1c0 [ 26.913569] ? lock_downgrade+0x8e0/0x8e0 [ 26.917695] ? lock_downgrade+0x8e0/0x8e0 [ 26.921825] ? kasan_check_read+0x11/0x20 [ 26.925954] ? do_raw_spin_unlock+0x9e/0x2e0 [ 26.930342] ? __local_bh_enable_ip+0x161/0x230 [ 26.934990] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.939998] ? release_sock+0x1e2/0x2b0 [ 26.943960] ? trace_hardirqs_on+0xd/0x10 [ 26.948094] ? __local_bh_enable_ip+0x161/0x230 [ 26.952750] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.957136] ? release_sock+0x1e2/0x2b0 [ 26.961090] ? __release_sock+0x3a0/0x3a0 [ 26.965227] ? __local_bh_enable_ip+0x161/0x230 [ 26.969880] ? lock_sock_nested+0xe7/0x120 [ 26.974094] ? smc_sendmsg+0x2d5/0x370 [ 26.977971] ? smc_sendpage+0x1a0/0x1a0 [ 26.981928] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.987443] ? sock_sendmsg+0x5a/0x120 [ 26.991318] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.996832] ? __sys_sendto+0x475/0x670 [ 27.000788] ? __ia32_sys_getpeername+0xb0/0xb0 [ 27.005435] ? __fd_install+0x2de/0x880 [ 27.009387] ? get_unused_fd_flags+0x190/0x190 [ 27.013950] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.019466] ? alloc_file+0x44/0x3e0 [ 27.023162] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.028680] ? sock_alloc_file+0x2a4/0x4e0 [ 27.032898] ? __alloc_fd+0x700/0x700 [ 27.036679] ? fd_install+0x4d/0x60 [ 27.040288] do_group_exit+0x16f/0x430 [ 27.044159] ? __ia32_sys_exit+0x50/0x50 [ 27.048202] ? do_syscall_64+0x92/0x800 [ 27.052159] __x64_sys_exit_group+0x3e/0x50 [ 27.056460] do_syscall_64+0x1b1/0x800 [ 27.060329] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.065241] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.070154] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.075502] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.080333] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.085500] RIP: 0033:0x43e8b8 [ 27.088668] RSP: 002b:00007ffc576ee5e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.096357] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8b8 [ 27.103615] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.110864] RBP: 00000000004be260 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.118111] R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000001 [ 27.125360] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.133220] Dumping ftrace buffer: [ 27.136857] (ftrace buffer empty) [ 27.140547] Kernel Offset: disabled [ 27.144156] Rebooting in 86400 seconds..