[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.816706] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   21.642756] random: sshd: uninitialized urandom read (32 bytes read)
[   21.914490] random: sshd: uninitialized urandom read (32 bytes read)
[   22.680996] random: sshd: uninitialized urandom read (32 bytes read)
[   23.946561] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.40' (ECDSA) to the list of known hosts.
[   29.390738] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   29.482133] kasan: CONFIG_KASAN_INLINE enabled
[   29.486873] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   29.494283] general protection fault: 0000 [#1] SMP KASAN
[   29.499820] Dumping ftrace buffer:
[   29.503343]    (ftrace buffer empty)
[   29.507036] Modules linked in:
[   29.510218] CPU: 0 PID: 4531 Comm: syz-executor107 Not tainted 4.17.0-rc4+ #53
[   29.517555] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.526919] RIP: 0010:smc_ioctl+0x6db/0x9f0
[   29.531217] RSP: 0018:ffff8801ae997770 EFLAGS: 00010202
[   29.536571] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: dffffc0000000000
[   29.543818] RDX: 0000000000000004 RSI: 1ffff10035d32f0d RDI: 0000000000000020
[   29.551065] RBP: ffff8801ae9979d0 R08: ffffed0035d32f0e R09: ffffed0035d32f0d
[   29.558314] R10: ffffed0035d32f0d R11: ffff8801ae99786f R12: 1ffff10035d32ef1
[   29.565565] R13: 00000000200003c0 R14: ffff8801ae997868 R15: ffff8801ae997828
[   29.572817] FS:  000000000158c880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
[   29.581026] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.586996] CR2: 00007ffffc7bb038 CR3: 00000001d9a35000 CR4: 00000000001406f0
[   29.594262] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.601510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.608758] Call Trace:
[   29.611333]  ? smc_shutdown+0x5c0/0x5c0
[   29.615289]  ? debug_check_no_locks_freed+0x310/0x310
[   29.620466]  ? save_stack+0xa9/0xd0
[   29.624076]  ? save_stack+0x43/0xd0
[   29.627684]  ? kasan_slab_alloc+0x12/0x20
[   29.631812]  ? kmem_cache_alloc+0x12e/0x760
[   29.636131]  ? get_empty_filp+0x125/0x520
[   29.640265]  ? alloc_file+0x24/0x3e0
[   29.643961]  ? sock_alloc_file+0x1f3/0x4e0
[   29.648181]  ? __sys_socket+0x16f/0x250
[   29.652132]  ? __x64_sys_socket+0x73/0xb0
[   29.656262]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   29.661612]  ? find_held_lock+0x36/0x1c0
[   29.665656]  ? debug_mutex_init+0x1c/0x60
[   29.669794]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   29.674795]  ? lockdep_init_map+0x9/0x10
[   29.678845]  sock_do_ioctl+0xe4/0x3e0
[   29.682631]  ? compat_ifr_data_ioctl+0x170/0x170
[   29.687372]  ? find_held_lock+0x36/0x1c0
[   29.691424]  ? lock_downgrade+0x8e0/0x8e0
[   29.695560]  ? __sanitizer_cov_trace_switch+0x53/0x90
[   29.700732]  sock_ioctl+0x30d/0x680
[   29.704339]  ? rcu_bh_force_quiescent_state+0x20/0x20
[   29.709518]  ? dlci_ioctl_set+0x40/0x40
[   29.713483]  ? __fd_install+0x2de/0x880
[   29.717436]  ? get_unused_fd_flags+0x190/0x190
[   29.722000]  ? dlci_ioctl_set+0x40/0x40
[   29.725961]  do_vfs_ioctl+0x1cf/0x16a0
[   29.729838]  ? ioctl_preallocate+0x2e0/0x2e0
[   29.734228]  ? fget_raw+0x20/0x20
[   29.737670]  ? get_unused_fd_flags+0x121/0x190
[   29.742235]  ? __alloc_fd+0x700/0x700
[   29.746034]  ? fd_install+0x4d/0x60
[   29.749658]  ? __sys_socket+0x19f/0x250
[   29.753630]  ? security_file_ioctl+0x94/0xc0
[   29.758024]  ksys_ioctl+0xa9/0xd0
[   29.761462]  __x64_sys_ioctl+0x73/0xb0
[   29.765331]  do_syscall_64+0x1b1/0x800
[   29.769205]  ? syscall_return_slowpath+0x5c0/0x5c0
[   29.774116]  ? syscall_return_slowpath+0x30f/0x5c0
[   29.779035]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   29.784380]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.789203]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   29.794375] RIP: 0033:0x43fca9
[   29.797548] RSP: 002b:00007ffffc793458 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
[   29.805236] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fca9
[   29.812485] RDX: 00000000200003c0 RSI: 000000000000894b RDI: 0000000000000003
[   29.819732] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   29.826991] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004015d0
[   29.834242] R13: 0000000000401660 R14: 0000000000000000 R15: 0000000000000000
[   29.841492] 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 
[   29.860638] RIP: smc_ioctl+0x6db/0x9f0 RSP: ffff8801ae997770
[   29.866492] ---[ end trace a680db5b800689af ]---
[   29.871266] Kernel panic - not syncing: Fatal exception
[   29.877015] Dumping ftrace buffer:
[   29.880545]    (ftrace buffer empty)
[   29.884233] Kernel Offset: disabled
[   29.887841] Rebooting in 86400 seconds..