[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.022677] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 33.238495] random: sshd: uninitialized urandom read (32 bytes read) [ 33.655920] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.049858] random: sshd: uninitialized urandom read (32 bytes read) [ 35.277853] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. [ 40.837794] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 40.955340] WARNING: CPU: 0 PID: 4581 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 40.963877] Kernel panic - not syncing: panic_on_warn set ... [ 40.963877] [ 40.971261] CPU: 0 PID: 4581 Comm: syz-executor802 Not tainted 4.18.0-rc4+ #24 [ 40.978614] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.987964] Call Trace: [ 40.990568] dump_stack+0x185/0x1e0 [ 40.994841] panic+0x3d0/0x9b0 [ 40.998046] __warn+0x40f/0x580 [ 41.001325] ? smc_unhash_sk+0x37b/0x3f0 [ 41.005402] report_bug+0x72a/0x880 [ 41.009086] ? smc_unhash_sk+0x37b/0x3f0 [ 41.013184] ? smc_unhash_sk+0x37b/0x3f0 [ 41.017283] do_error_trap+0x1fe/0x710 [ 41.021202] ? sock_destroy_inode+0xab/0xd0 [ 41.025543] ? sock_alloc_inode+0x2b0/0x2b0 [ 41.029872] do_invalid_op+0x46/0x50 [ 41.033586] invalid_op+0x14/0x20 [ 41.037056] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 41.041725] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 a8 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 a8 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 a5 f6 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 02 a8 d5 f7 4d 85 e4 [ 41.061069] RSP: 0018:ffff8801bbf9f9f8 EFLAGS: 00010293 [ 41.066460] RAX: ffffffff89ee346b RBX: ffff8801a0230080 RCX: ffff8801beea8000 [ 41.073735] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009c0d200 [ 41.081017] RBP: ffff8801bbf9fa78 R08: 0000000000480020 R09: 0000000000000002 [ 41.088399] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 41.095669] R13: ffff8801a0230000 R14: 0000000000000001 R15: 00000000f9000098 [ 41.102959] ? smc_hash_sk+0x3a0/0x3a0 [ 41.106870] ? smc_unhash_sk+0x37b/0x3f0 [ 41.110934] ? smc_unhash_sk+0x37b/0x3f0 [ 41.114994] ? smc_hash_sk+0x3a0/0x3a0 [ 41.118895] smc_release+0x81b/0x900 [ 41.122629] ? smc_sock_alloc+0x830/0x830 [ 41.126806] sock_close+0x11e/0x360 [ 41.130448] __fput+0x458/0xa30 [ 41.133745] ? fput+0x300/0x300 [ 41.137046] ____fput+0x37/0x40 [ 41.140349] task_work_run+0x22e/0x2b0 [ 41.144240] do_exit+0x110e/0x3930 [ 41.147807] do_group_exit+0x1a0/0x360 [ 41.151716] __do_sys_exit_group+0x21/0x30 [ 41.155965] __se_sys_exit_group+0x14/0x20 [ 41.160224] __x64_sys_exit_group+0x4c/0x50 [ 41.164578] ? do_group_exit+0x360/0x360 [ 41.168659] do_syscall_64+0x15b/0x230 [ 41.172550] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 41.177736] RIP: 0033:0x43ec78 [ 41.180915] Code: Bad RIP value. [ 41.184291] RSP: 002b:00007fff621dda48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 41.191998] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec78 [ 41.199262] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 41.206525] RBP: 00000000004be528 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 41.213789] R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000001 [ 41.221060] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 41.228829] Dumping ftrace buffer: [ 41.232363] (ftrace buffer empty) [ 41.236063] Kernel Offset: disabled [ 41.239692] Rebooting in 86400 seconds..