[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   32.289179] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   36.487979] random: sshd: uninitialized urandom read (32 bytes read)
[   36.931598] random: sshd: uninitialized urandom read (32 bytes read)
[   38.110569] random: sshd: uninitialized urandom read (32 bytes read)
[   38.341017] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts.
[   43.869244] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   44.003756] ==================================================================
[   44.011156] BUG: KMSAN: uninit-value in __x64_sys_futex+0x1b9/0x200
[   44.017553] CPU: 1 PID: 4508 Comm: syz-executor463 Not tainted 4.17.0-rc3+ #88
[   44.024887] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.034222] Call Trace:
[   44.036805]  dump_stack+0x185/0x1d0
[   44.040409]  ? __x64_sys_futex+0x1b9/0x200
[   44.044619]  kmsan_report+0x142/0x240
[   44.048427]  __msan_warning_32+0x6c/0xb0
[   44.052512]  __x64_sys_futex+0x1b9/0x200
[   44.057191]  ? __x64_sys_sendmmsg+0x11c/0x170
[   44.061672]  do_syscall_64+0x154/0x220
[   44.065543]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   44.070711] RIP: 0033:0x4458a9
[   44.073876] RSP: 002b:00007f5d39225db8 EFLAGS: 00000202 ORIG_RAX: 00000000000000ca
[   44.081573] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 00000000004458a9
[   44.088822] RDX: 00000000004458a9 RSI: 0000000000000001 RDI: 00000000006dac3c
[   44.096074] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000
[   44.103321] R10: 00007f5d39226700 R11: 0000000000000202 R12: 0000000000000000
[   44.110569] R13: 00007ffc3c1fc0bf R14: 00007f5d392269c0 R15: 0000000000000001
[   44.117822] 
[   44.119432] Local variable description: ----msg_sys@__sys_sendmmsg
[   44.125730] Variable was created at:
[   44.129432]  __sys_sendmmsg+0x9c/0x850
[   44.133303]  __x64_sys_sendmmsg+0x11c/0x170
[   44.137601] ==================================================================
[   44.144933] Disabling lock debugging due to kernel taint
[   44.150358] Kernel panic - not syncing: panic_on_warn set ...
[   44.150358] 
[   44.157704] CPU: 1 PID: 4508 Comm: syz-executor463 Tainted: G    B             4.17.0-rc3+ #88
[   44.166427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.175757] Call Trace:
[   44.178333]  dump_stack+0x185/0x1d0
[   44.181948]  panic+0x39d/0x940
[   44.185132]  ? __x64_sys_futex+0x1b9/0x200
[   44.189347]  kmsan_report+0x238/0x240
[   44.193138]  __msan_warning_32+0x6c/0xb0
[   44.197184]  __x64_sys_futex+0x1b9/0x200
[   44.201225]  ? __x64_sys_sendmmsg+0x11c/0x170
[   44.205698]  do_syscall_64+0x154/0x220
[   44.209574]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   44.214745] RIP: 0033:0x4458a9
[   44.217919] RSP: 002b:00007f5d39225db8 EFLAGS: 00000202 ORIG_RAX: 00000000000000ca
[   44.225605] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 00000000004458a9
[   44.232853] RDX: 00000000004458a9 RSI: 0000000000000001 RDI: 00000000006dac3c
[   44.240107] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000
[   44.247360] R10: 00007f5d39226700 R11: 0000000000000202 R12: 0000000000000000
[   44.254617] R13: 00007ffc3c1fc0bf R14: 00007f5d392269c0 R15: 0000000000000001
[   44.262480] Dumping ftrace buffer:
[   44.266004]    (ftrace buffer empty)
[   44.269688] Kernel Offset: disabled
[   44.273300] Rebooting in 86400 seconds..