[....] Starting OpenBSD Secure Shell server: sshd[   18.081272] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c[   18.193630] random: sshd: uninitialized urandom read (32 bytes read)
.
[   18.528128] random: sshd: uninitialized urandom read (32 bytes read)
[   19.221700] sshd (4470) used greatest stack depth: 16456 bytes left
[   19.241600] random: sshd: uninitialized urandom read (32 bytes read)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   33.886067] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts.
[   39.279668] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   39.365278] kasan: CONFIG_KASAN_INLINE enabled
[   39.369958] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   39.377349] general protection fault: 0000 [#1] SMP KASAN
[   39.382869] Dumping ftrace buffer:
[   39.386380]    (ftrace buffer empty)
[   39.390064] Modules linked in:
[   39.393241] CPU: 0 PID: 4487 Comm: syz-executor011 Not tainted 4.17.0-rc4+ #54
[   39.400574] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.409913] RIP: 0010:smc_ioctl+0x6db/0x9f0
[   39.414207] RSP: 0018:ffff8801adaf7770 EFLAGS: 00010202
[   39.419549] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: dffffc0000000000
[   39.426795] RDX: 0000000000000004 RSI: 1ffff10035b5ef0d RDI: 0000000000000020
[   39.434054] RBP: ffff8801adaf79d0 R08: ffffed0035b5ef0e R09: ffffed0035b5ef0d
[   39.441302] R10: ffffed0035b5ef0d R11: ffff8801adaf786f R12: 1ffff10035b5eef1
[   39.448548] R13: 0000000020000000 R14: ffff8801adaf7868 R15: ffff8801adaf7828
[   39.455799] FS:  0000000001032880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
[   39.463999] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   39.469854] CR2: 00007ffd1cf8e038 CR3: 00000001ad1fe000 CR4: 00000000001406f0
[   39.477101] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   39.484346] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   39.491590] Call Trace:
[   39.494159]  ? smc_shutdown+0x5c0/0x5c0
[   39.498112]  ? debug_check_no_locks_freed+0x310/0x310
[   39.503278]  ? save_stack+0xa9/0xd0
[   39.506880]  ? save_stack+0x43/0xd0
[   39.510479]  ? kasan_slab_alloc+0x12/0x20
[   39.514601]  ? kmem_cache_alloc+0x12e/0x760
[   39.518896]  ? get_empty_filp+0x125/0x520
[   39.523018]  ? alloc_file+0x24/0x3e0
[   39.526709]  ? sock_alloc_file+0x1f3/0x4e0
[   39.530914]  ? __sys_socket+0x16f/0x250
[   39.534859]  ? __x64_sys_socket+0x73/0xb0
[   39.538982]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   39.544319]  ? find_held_lock+0x36/0x1c0
[   39.548356]  ? debug_mutex_init+0x1c/0x60
[   39.552479]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   39.557471]  ? lockdep_init_map+0x9/0x10
[   39.561509]  sock_do_ioctl+0xe4/0x3e0
[   39.565286]  ? compat_ifr_data_ioctl+0x170/0x170
[   39.570017]  ? find_held_lock+0x36/0x1c0
[   39.574055]  ? lock_downgrade+0x8e0/0x8e0
[   39.578188]  ? __sanitizer_cov_trace_switch+0x53/0x90
[   39.583352]  sock_ioctl+0x30d/0x680
[   39.586954]  ? rcu_bh_force_quiescent_state+0x20/0x20
[   39.592116]  ? dlci_ioctl_set+0x40/0x40
[   39.596065]  ? __fd_install+0x2de/0x880
[   39.600014]  ? get_unused_fd_flags+0x190/0x190
[   39.604572]  ? dlci_ioctl_set+0x40/0x40
[   39.608527]  do_vfs_ioctl+0x1cf/0x16a0
[   39.612395]  ? ioctl_preallocate+0x2e0/0x2e0
[   39.616777]  ? fget_raw+0x20/0x20
[   39.620204]  ? get_unused_fd_flags+0x121/0x190
[   39.624759]  ? __alloc_fd+0x700/0x700
[   39.628533]  ? fd_install+0x4d/0x60
[   39.632132]  ? __sys_socket+0x19f/0x250
[   39.636085]  ? security_file_ioctl+0x94/0xc0
[   39.640474]  ksys_ioctl+0xa9/0xd0
[   39.643903]  __x64_sys_ioctl+0x73/0xb0
[   39.647769]  do_syscall_64+0x1b1/0x800
[   39.651629]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   39.656446]  ? syscall_return_slowpath+0x5c0/0x5c0
[   39.661354]  ? syscall_return_slowpath+0x30f/0x5c0
[   39.666260]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   39.671598]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   39.676418]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   39.681584] RIP: 0033:0x43fca9
[   39.684750] RSP: 002b:00007ffd1ceb0548 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
[   39.692434] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fca9
[   39.699680] RDX: 0000000020000000 RSI: 000000000000894b RDI: 0000000000000003
[   39.706925] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   39.714168] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004015d0
[   39.721413] R13: 0000000000401660 R14: 0000000000000000 R15: 0000000000000000
[   39.728658] Code: f8 48 c1 e8 03 80 3c 10 00 0f 85 ed 01 00 00 48 8b 9b 90 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b7 01 00 00 8b 43 20 49 8d 
[   39.747786] RIP: smc_ioctl+0x6db/0x9f0 RSP: ffff8801adaf7770
[   39.753649] ---[ end trace d5b6702ca0657d1a ]---
[   39.758393] Kernel panic - not syncing: Fatal exception
[   39.764085] Dumping ftrace buffer:
[   39.767600]    (ftrace buffer empty)
[   39.771287] Kernel Offset: disabled
[   39.774887] Rebooting in 86400 seconds..