[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.300737] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   25.271378] random: sshd: uninitialized urandom read (32 bytes read)
[   25.670241] random: sshd: uninitialized urandom read (32 bytes read)
[   26.527893] random: sshd: uninitialized urandom read (32 bytes read)
[   26.685491] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts.
[   32.188207] random: sshd: uninitialized urandom read (32 bytes read)
[   32.291967] kasan: CONFIG_KASAN_INLINE enabled
[   32.296613] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   32.303955] general protection fault: 0000 [#1] SMP KASAN
[   32.309467] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc4+ #147
[   32.313153] process 4533 (syz-executor900) no longer affine to cpu0
[   32.322483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.331827] RIP: 0010:vmx_vcpu_run+0x1328/0x2600
[   32.336559] Code: 91 00 00 00 e8 19 c4 5c 00 48 8b 54 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8c 10 00 00 48 8b 04 24 <48> 8b 98 40 57 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 40 48 
[   32.355730] RSP: 0018:ffff8801b5e07370 EFLAGS: 00010046
[   32.361075] ==================================================================
[   32.368433] BUG: KASAN: stack-out-of-bounds in __show_regs.cold.7+0x2b/0x54a
[   32.375602] Read of size 8 at addr ffff8801b5e07320 by task swapper/0/0
[   32.382333] 
[   32.384470] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc4+ #147
[   32.391121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.400456] Call Trace:
[   32.403019] 
[   32.404623] The buggy address belongs to the page:
[   32.409536] page:ffffea0006d781c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[   32.417659] flags: 0x2fffc0000000000()
[   32.421530] raw: 02fffc0000000000 0000000000000000 ffffffff06d70101 0000000000000000
[   32.429407] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   32.437269] page dumped because: kasan: bad access detected
[   32.442954] 
[   32.444556] Memory state around the buggy address:
[   32.449466]  ffff8801b5e07200: 00 00 00 00 00 00 f2 f2 f2 f2 00 f2 f2 f2 f2 f2
[   32.456806]  ffff8801b5e07280: f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2
[   32.464147] >ffff8801b5e07300: f2 f2 f8 f2 f2 f2 00 00 00 00 00 00 00 00 00 00
[   32.471493]                                ^
[   32.475881]  ffff8801b5e07380: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2
[   32.483232]  ffff8801b5e07400: 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 00 00 00 00
[   32.490574] ==================================================================
[   32.497912] Kernel panic - not syncing: panic_on_warn set ...
[   32.497912] 
[   33.587006] Shutting down cpus with NMI
[   33.591950] Dumping ftrace buffer:
[   33.595481]    (ftrace buffer empty)
[   33.599165] Kernel Offset: disabled
[   33.602770] Rebooting in 86400 seconds..