[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[    6.253403] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   11.782432] random: sshd: uninitialized urandom read (32 bytes read)
[   12.069414] random: sshd: uninitialized urandom read (32 bytes read)
[   12.339765] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts.
[   17.860225] urandom_read: 1 callbacks suppressed
[   17.860227] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
[   17.939524] tpacket_rcv: packet too big, clamped from 108 to 4294967264. macoff=96
executing program
[   17.981094] Kernel panic - not syncing: corrupted stack end detected inside scheduler
[   17.981094] 
[   17.990559] CPU: 1 PID: 4056 Comm: syz-executor220 Not tainted 4.18.0-rc8+ #32
[   17.997894] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   18.007226] Call Trace:
[   18.009791]  dump_stack+0xae/0xf0
[   18.013227]  panic+0x121/0x390
[   18.016392]  ? select_task_rq_fair+0x5c2/0x10a0
[   18.021039]  ? exit_robust_list+0x14b/0x1c0
[   18.025334]  __schedule+0x864/0x870
[   18.028937]  ? mmput+0xe/0x40
[   18.032026]  ? find_first_bit+0x99/0xa0
[   18.035974]  ? proc_exit_connector+0xc8/0xe0
[   18.040363]  do_task_dead+0x3d/0x50
[   18.043968]  do_exit+0xa8e/0xd70
[   18.047314]  do_group_exit+0xec/0xf0
[   18.051009]  __do_sys_exit_group+0xf/0x10
[   18.055138]  __se_sys_exit_group+0x9/0x10
[   18.059265]  __x64_sys_exit_group+0xd/0x10
[   18.063477]  do_syscall_64+0x61/0x90
[   18.067161]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   18.072318] RIP: 0033:0x4451b8
[   18.075478] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 
[   18.094570] RSP: 002b:00007fff1290dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.102354] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004451b8
[   18.109601] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   18.116841] RBP: 00000000004cc9b0 R08: 00000000000000e7 R09: ffffffffffffffd0
[   18.124084] R10: 00007fff1290dd50 R11: 0000000000000246 R12: 0000000000000001
[   18.131329] R13: 00000000006e0320 R14: 0000000000000006 R15: 00000000006dbd2c
[   18.138865] Dumping ftrace buffer:
[   18.142384]    (ftrace buffer empty)
[   18.146063] Kernel Offset: disabled
[   18.149658] Rebooting in 86400 seconds..