[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 5.592760] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.860294] random: sshd: uninitialized urandom read (32 bytes read) [ 17.038702] random: sshd: uninitialized urandom read (32 bytes read) [ 17.447407] random: sshd: uninitialized urandom read (32 bytes read) [ 44.431144] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 49.977023] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 50.048863] WARNING: CPU: 0 PID: 4025 at ./include/net/sock.h:644 smc_unhash_sk+0xa6/0xb0 [ 50.057189] Kernel panic - not syncing: panic_on_warn set ... [ 50.057189] [ 50.064527] CPU: 0 PID: 4025 Comm: syz-executor257 Not tainted 4.18.0-rc5+ #30 [ 50.071873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.081196] Call Trace: [ 50.083754] dump_stack+0xae/0xf0 [ 50.087176] panic+0x121/0x390 [ 50.090348] ? printk+0x5a/0x70 [ 50.093595] ? smc_unhash_sk+0xa6/0xb0 [ 50.097450] __warn+0x188/0x190 [ 50.100698] ? smc_unhash_sk+0xa6/0xb0 [ 50.104554] report_bug+0x1bf/0x200 [ 50.108158] do_error_trap+0x47/0x1b0 [ 50.111927] ? dst_release+0x34/0x90 [ 50.115611] ? fsnotify_destroy_marks+0x58/0x250 [ 50.120336] do_invalid_op+0x1b/0x20 [ 50.124031] invalid_op+0x14/0x20 [ 50.127453] RIP: 0010:smc_unhash_sk+0xa6/0xb0 [ 50.131913] Code: 0f 00 48 8b 73 28 48 8b 7b 30 ba ff ff ff ff e8 f0 46 9d ff 4c 89 f7 e8 e8 9d 0f 00 5b 41 5c 41 5e 41 5f 5d c3 e8 8a d3 88 fe <0f> 0b eb c1 66 0f 1f 44 00 00 55 48 89 e5 41 56 53 41 89 f6 48 89 [ 50.151533] RSP: 0018:ffff8802016a7d40 EFLAGS: 00010293 [ 50.156864] RAX: ffffffff828dd8e6 RBX: ffff880201600000 RCX: ffff8801fe80d280 [ 50.164103] RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff83b1c2f0 [ 50.171343] RBP: ffff8802016a7d60 R08: ffffffff7fffffff R09: 0000000000000000 [ 50.178677] R10: ffff8802014d99c0 R11: ffffffff828dd840 R12: 0000000000000000 [ 50.185931] R13: ffff88020f613a10 R14: ffffffff83b1c2f0 R15: ffffffff83b1c2f8 [ 50.193178] ? smc_hash_sk+0x90/0x90 [ 50.196871] ? smc_unhash_sk+0xa6/0xb0 [ 50.200726] smc_release+0x1af/0x1f0 [ 50.204418] sock_close+0x48/0xd0 [ 50.207838] ? sock_mmap+0x40/0x40 [ 50.211346] __fput+0x110/0x280 [ 50.214605] ____fput+0x15/0x20 [ 50.217852] task_work_run+0xb4/0xe0 [ 50.221532] do_exit+0x3a7/0xd70 [ 50.224884] ? syscall_return_slowpath+0x3f/0x270 [ 50.229693] do_group_exit+0x68/0xf0 [ 50.233400] __do_sys_exit_group+0xf/0x10 [ 50.237541] __se_sys_exit_group+0x9/0x10 [ 50.241659] __x64_sys_exit_group+0xd/0x10 [ 50.245862] do_syscall_64+0x61/0x90 [ 50.249546] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 50.254704] RIP: 0033:0x43eed8 [ 50.257865] Code: Bad RIP value. [ 50.261222] RSP: 002b:00007ffefaf4daa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 50.268900] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eed8 [ 50.276152] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 50.283407] RBP: 00000000004be788 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 50.290662] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 50.297903] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 50.305553] Dumping ftrace buffer: [ 50.309066] (ftrace buffer empty) [ 50.312759] Kernel Offset: disabled [ 50.316365] Rebooting in 86400 seconds..