[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   18.607330] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.167465] random: sshd: uninitialized urandom read (32 bytes read)
[   22.469874] random: sshd: uninitialized urandom read (32 bytes read)
[   23.184069] random: sshd: uninitialized urandom read (32 bytes read)
[   24.598662] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts.
[   30.088720] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   30.181268] kasan: CONFIG_KASAN_INLINE enabled
[   30.186153] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   30.193561] general protection fault: 0000 [#1] SMP KASAN
[   30.199095] Dumping ftrace buffer:
[   30.202615]    (ftrace buffer empty)
[   30.206301] Modules linked in:
[   30.209476] CPU: 0 PID: 4492 Comm: syz-executor451 Not tainted 4.17.0-rc2+ #48
[   30.216809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.226154] RIP: 0010:smc_setsockopt+0x8b/0x120
[   30.230798] RSP: 0018:ffff8801adebfc70 EFLAGS: 00010206
[   30.236149] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000d
[   30.243404] RDX: 0000000000000005 RSI: ffffffff873e71a6 RDI: 0000000000000028
[   30.250654] RBP: ffff8801adebfca0 R08: 0000000020000000 R09: ffffed003b5c46c2
[   30.257907] R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801adebfcf0
[   30.265157] R13: 0000000000000000 R14: 0000000000000021 R15: 000000000000000d
[   30.272414] FS:  0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:000000000966a840
[   30.280625] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   30.286495] CR2: 0000555bdfedc0b0 CR3: 00000001ae082000 CR4: 00000000001406f0
[   30.293750] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.301006] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.308263] Call Trace:
[   30.310838]  __compat_sys_setsockopt+0x315/0x7c0
[   30.315577]  ? __compat_sys_getsockopt+0x7f0/0x7f0
[   30.320495]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   30.326017]  ? exit_to_usermode_loop+0x1ef/0x310
[   30.330760]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   30.335583]  __ia32_compat_sys_setsockopt+0xbd/0x150
[   30.340664]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   30.345661]  do_fast_syscall_32+0x345/0xf9b
[   30.349970]  ? do_int80_syscall_32+0x880/0x880
[   30.354533]  ? do_syscall_64+0x48f/0x800
[   30.358574]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   30.363396]  ? syscall_return_slowpath+0x5c0/0x5c0
[   30.368305]  ? syscall_return_slowpath+0x30f/0x5c0
[   30.373214]  ? sysret32_from_system_call+0x5/0x46
[   30.378041]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   30.382864]  entry_SYSENTER_compat+0x70/0x7f
[   30.387250] RIP: 0023:0xf7fd9cb9
[   30.390589] RSP: 002b:00000000ffab721c EFLAGS: 00000296 ORIG_RAX: 000000000000016e
[   30.398273] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000000
[   30.405526] RDX: 0000000000000021 RSI: 000000000000000d RDI: 0000000020000000
[   30.412773] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   30.420029] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   30.427276] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   30.434524] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 93 00 00 00 48 8b 9b 50 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 62 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 28 49 
[   30.453663] RIP: smc_setsockopt+0x8b/0x120 RSP: ffff8801adebfc70
[   30.459986] ---[ end trace d5fe40d9ed0cec48 ]---
[   30.464758] Kernel panic - not syncing: Fatal exception
[   30.470525] Dumping ftrace buffer:
[   30.474050]    (ftrace buffer empty)
[   30.477735] Kernel Offset: disabled
[   30.481351] Rebooting in 86400 seconds..