[   20.441149] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available)
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.
[   20.925052] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[   21.163422] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.151615] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available)
[   22.329271] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available)
Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts.
[   27.728020] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available)
executing program
[   27.820923] kasan: CONFIG_KASAN_INLINE enabled
[   27.825675] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.838499] Dumping ftrace buffer:
[   27.842007]    (ftrace buffer empty)
[   27.845685] Modules linked in:
[   27.848964] CPU: 1 PID: 3764 Comm: syzkaller270084 Not tainted 4.4.124-g851fb4d #60
[   27.856723] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.866046] task: ffff8801d94f4800 task.stack: ffff8800b76d8000
[   27.872068] RIP: 0010:[<ffffffff81434eb1>]  [<ffffffff81434eb1>] __free_pages+0x21/0x90
[   27.880314] RSP: 0018:ffff8800b76dfaa8  EFLAGS: 00010a07
[   27.885730] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825bb03b
[   27.892966] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   27.900206] RBP: ffff8800b76dfab8 R08: 0000000000000001 R09: 0000000000000001
[   27.907446] R10: 0000000000000000 R11: 1ffff10016edbf32 R12: 0000000000000004
[   27.915353] R13: 0000000000000020 R14: ffff8801d461c200 R15: dffffc0000000000
[   27.922592] FS:  0000000001676880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   27.930791] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.936641] CR2: 000000000043e530 CR3: 00000000bbbd0000 CR4: 0000000000160670
[   27.943888] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.951127] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.958366] Stack:
[   27.960486]  0000000000000246 ffff8801d461c358 ffff8800b76dfb18 ffffffff825bb061
[   27.968456]  ffff8801d461c370 ffffed003a8c386b ffffed003a8c386e ffff8801d461c368
[   27.976417]  dead4ead00000000 ffff8801d461c340 0000000000000000 0000000000000000
[   27.984379] Call Trace:
[   27.986949]  [<ffffffff825bb061>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   27.993408]  [<ffffffff825bb416>] sg_finish_rem_req+0x2a6/0x320
[   27.999433]  [<ffffffff825bb7fc>] sg_new_read+0x36c/0x420
[   28.004936]  [<ffffffff825bd19f>] sg_read+0x8cf/0x14d0
[   28.010183]  [<ffffffff825bc8d0>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   28.016903]  [<ffffffff83778caa>] ? _raw_spin_unlock_irqrestore+0x5a/0x70
[   28.023798]  [<ffffffff81236f3b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   28.030602]  [<ffffffff83778c95>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   28.037495]  [<ffffffff825bc8d0>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   28.044130]  [<ffffffff8151d6e3>] __vfs_read+0x103/0x440
[   28.049549]  [<ffffffff814ff3cb>] ? quarantine_put+0xab/0x180
[   28.055401]  [<ffffffff8151d5e0>] ? vfs_iter_write+0x2d0/0x2d0
[   28.061339]  [<ffffffff815ea0cd>] ? fsnotify+0x5ad/0xee0
[   28.066757]  [<ffffffff815eaa00>] ? fsnotify+0xee0/0xee0
[   28.072174]  [<ffffffff81b4f719>] ? avc_policy_seqno+0x9/0x20
[   28.078035]  [<ffffffff81b60de8>] ? selinux_file_permission+0x348/0x460
[   28.084756]  [<ffffffff81b46619>] ? security_file_permission+0x89/0x1e0
[   28.091473]  [<ffffffff8151f270>] ? rw_verify_area+0x100/0x2f0
[   28.097426]  [<ffffffff8151f583>] vfs_read+0x123/0x3a0
[   28.102672]  [<ffffffff81521ec9>] SyS_read+0xd9/0x1b0
[   28.107834]  [<ffffffff81521df0>] ? do_sendfile+0xd30/0xd30
[   28.113515]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   28.119982]  [<ffffffff837796e5>] entry_SYSCALL_64_fastpath+0x22/0x9e
[   28.126529] Code: c6 a0 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 
[   28.153083] RIP  [<ffffffff81434eb1>] __free_pages+0x21/0x90
[   28.158969]  RSP <ffff8800b76dfaa8>
[   28.162816] ---[ end trace 671debe8605ece90 ]---
[   28.167569] Kernel panic - not syncing: Fatal exception
[   28.173371] Dumping ftrace buffer:
[   28.176891]    (ftrace buffer empty)
[   28.180573] Kernel Offset: disabled
[   28.184168] Rebooting in 86400 seconds..