[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.462770] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.405835] random: sshd: uninitialized urandom read (32 bytes read)
[   22.789134] random: sshd: uninitialized urandom read (32 bytes read)
[   23.599269] random: sshd: uninitialized urandom read (32 bytes read)
[   23.762764] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts.
[   29.188367] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   29.276948] kasan: CONFIG_KASAN_INLINE enabled
[   29.281669] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   29.289240] general protection fault: 0000 [#1] SMP KASAN
[   29.294772] Dumping ftrace buffer:
[   29.298287]    (ftrace buffer empty)
[   29.301975] Modules linked in:
[   29.305147] CPU: 1 PID: 4559 Comm: syz-executor292 Not tainted 4.17.0-rc4+ #50
[   29.312480] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.321817] RIP: 0010:smc_ioctl+0x3dc/0x9f0
[   29.326112] RSP: 0018:ffff8801ad22f770 EFLAGS: 00010202
[   29.331449] RAX: dffffc0000000000 RBX: ffff8801ad0df7c0 RCX: ffffffff8741188f
[   29.338693] RDX: 0000000000000004 RSI: ffffffff8741189e RDI: 0000000000000020
[   29.345937] RBP: ffff8801ad22f9d0 R08: ffff8801ae87e6c0 R09: ffffed00363e1818
[   29.353183] R10: ffffed00363e1818 R11: ffff8801b1f0c0c3 R12: 1ffff10035a45ef1
[   29.360432] R13: 0000000020000080 R14: 0000000000000000 R15: 0000000000000000
[   29.367680] FS:  00000000017b7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
[   29.375881] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.381739] CR2: 00007ffd1f18f038 CR3: 00000001ad044000 CR4: 00000000001406e0
[   29.389349] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.396599] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.403843] Call Trace:
[   29.406415]  ? smc_shutdown+0x5c0/0x5c0
[   29.410366]  ? debug_check_no_locks_freed+0x310/0x310
[   29.415542]  ? save_stack+0xa9/0xd0
[   29.419162]  ? save_stack+0x43/0xd0
[   29.422781]  ? kasan_kmalloc+0xc4/0xe0
[   29.426643]  ? kasan_slab_alloc+0x12/0x20
[   29.430770]  ? kmem_cache_alloc+0x12e/0x760
[   29.435082]  ? get_empty_filp+0x125/0x520
[   29.439207]  ? alloc_file+0x24/0x3e0
[   29.442898]  ? sock_alloc_file+0x1f3/0x4e0
[   29.447108]  ? __sys_socket+0x16f/0x250
[   29.451060]  ? __x64_sys_socket+0x73/0xb0
[   29.455186]  ? do_syscall_64+0x1b1/0x800
[   29.459233]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   29.464578]  ? find_held_lock+0x36/0x1c0
[   29.468616]  ? debug_mutex_init+0x1c/0x60
[   29.472743]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   29.477738]  ? graph_lock+0x170/0x170
[   29.481522]  ? lockdep_init_map+0x9/0x10
[   29.485561]  sock_do_ioctl+0xe4/0x3e0
[   29.489340]  ? compat_ifr_data_ioctl+0x170/0x170
[   29.494073]  ? find_held_lock+0x36/0x1c0
[   29.498111]  ? lock_downgrade+0x8e0/0x8e0
[   29.502239]  ? __sanitizer_cov_trace_switch+0x53/0x90
[   29.507405]  sock_ioctl+0x30d/0x680
[   29.511026]  ? rcu_bh_force_quiescent_state+0x20/0x20
[   29.516197]  ? dlci_ioctl_set+0x40/0x40
[   29.520151]  ? __fd_install+0x2de/0x880
[   29.524102]  ? get_unused_fd_flags+0x190/0x190
[   29.528663]  ? dlci_ioctl_set+0x40/0x40
[   29.532615]  do_vfs_ioctl+0x1cf/0x16a0
[   29.536479]  ? ioctl_preallocate+0x2e0/0x2e0
[   29.540864]  ? fget_raw+0x20/0x20
[   29.544292]  ? get_unused_fd_flags+0x121/0x190
[   29.548849]  ? __alloc_fd+0x700/0x700
[   29.552634]  ? fd_install+0x4d/0x60
[   29.556242]  ? __sys_socket+0x19f/0x250
[   29.560197]  ? security_file_ioctl+0x94/0xc0
[   29.564583]  ksys_ioctl+0xa9/0xd0
[   29.568020]  __x64_sys_ioctl+0x73/0xb0
[   29.571895]  do_syscall_64+0x1b1/0x800
[   29.575761]  ? syscall_return_slowpath+0x5c0/0x5c0
[   29.580668]  ? syscall_return_slowpath+0x30f/0x5c0
[   29.585578]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   29.590918]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.595740]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   29.600908] RIP: 0033:0x43fca9
[   29.604075] RSP: 002b:00007ffd1f073588 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
[   29.611762] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fca9
[   29.619015] RDX: 0000000020000080 RSI: 0000000000005411 RDI: 0000000000000003
[   29.626270] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   29.633517] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004015d0
[   29.640763] R13: 0000000000401660 R14: 0000000000000000 R15: 0000000000000000
[   29.648012] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 7d 05 00 00 4c 8b b3 90 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 47 05 00 00 45 8b 7e 20 4c 
[   29.667166] RIP: smc_ioctl+0x3dc/0x9f0 RSP: ffff8801ad22f770
[   29.673031] ---[ end trace b586e1eb098f7714 ]---
[   29.677792] Kernel panic - not syncing: Fatal exception
[   29.683674] Dumping ftrace buffer:
[   29.687200]    (ftrace buffer empty)
[   29.690886] Kernel Offset: disabled
[   29.694488] Rebooting in 86400 seconds..