[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[[[   21.351479] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available)
32m ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.
[   21.783674] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available)
[   22.078425] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   23.061481] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available)
[   23.232685] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available)
Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts.
[   28.659351] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available)
executing program
[   28.770072] kasan: CONFIG_KASAN_INLINE enabled
[   28.774481] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.787730] Dumping ftrace buffer:
[   28.791239]    (ftrace buffer empty)
[   28.794916] Modules linked in:
[   28.798189] CPU: 0 PID: 3786 Comm: syzkaller265505 Not tainted 4.4.120-gd63fdf6 #28
[   28.805949] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.815272] task: ffff8801c57ae000 task.stack: ffff8800a9d20000
[   28.821292] RIP: 0010:[<ffffffff81434701>]  [<ffffffff81434701>] __free_pages+0x21/0x90
[   28.829525] RSP: 0018:ffff8800a9d27ab0  EFLAGS: 00010a07
[   28.834944] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b85eb
[   28.842190] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   28.849426] RBP: ffff8800a9d27ac0 R08: 0000000000000001 R09: 0000000000000001
[   28.856664] R10: 0000000000000000 R11: 1ffff100153a4f34 R12: 0000000000000004
[   28.863903] R13: 0000000000000020 R14: ffff8800bb9b8000 R15: dffffc0000000000
[   28.871141] FS:  000000000087e880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   28.879333] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.885180] CR2: 000000000043e530 CR3: 00000000b5ad6000 CR4: 0000000000160670
[   28.892421] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.899658] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.906892] Stack:
[   28.909006]  0000000000000246 ffff8800bb9b8158 ffff8800a9d27b20 ffffffff825b8611
[   28.916964]  ffff8800bb9b8170 ffffed001773702b ffffed001773702e ffff8800bb9b8168
[   28.924922]  dead4ead00000000 ffff8800bb9b8140 0000000000000000 0000000000000000
[   28.932882] Call Trace:
[   28.935439]  [<ffffffff825b8611>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.941900]  [<ffffffff825b89d5>] sg_finish_rem_req+0x2b5/0x340
[   28.947938]  [<ffffffff825b8d96>] sg_new_read.isra.18+0x336/0x3c0
[   28.954135]  [<ffffffff825ba6fc>] sg_read+0x8bc/0x1490
[   28.959380]  [<ffffffff825b9e40>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   28.966014]  [<ffffffff83772f3a>] ? _raw_spin_unlock_irqrestore+0x5a/0x70
[   28.972912]  [<ffffffff81236bdb>] ? trace_hardirqs_on_caller+0x38b/0x590
[   28.979730]  [<ffffffff83772f25>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   28.986625]  [<ffffffff825b9e40>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   28.993266]  [<ffffffff8151cf33>] __vfs_read+0x103/0x440
[   28.998681]  [<ffffffff814fec1b>] ? quarantine_put+0xab/0x180
[   29.004539]  [<ffffffff8151ce30>] ? vfs_iter_write+0x2d0/0x2d0
[   29.010477]  [<ffffffff815e984d>] ? fsnotify+0x5ad/0xee0
[   29.015892]  [<ffffffff815ea180>] ? fsnotify+0xee0/0xee0
[   29.021317]  [<ffffffff81b4d1e9>] ? avc_policy_seqno+0x9/0x20
[   29.027167]  [<ffffffff81b5e8b8>] ? selinux_file_permission+0x348/0x460
[   29.033886]  [<ffffffff81b440e9>] ? security_file_permission+0x89/0x1e0
[   29.040608]  [<ffffffff8151eac0>] ? rw_verify_area+0x100/0x2f0
[   29.046548]  [<ffffffff8151edd3>] vfs_read+0x123/0x3a0
[   29.051790]  [<ffffffff81521719>] SyS_read+0xd9/0x1b0
[   29.056946]  [<ffffffff81521640>] ? do_sendfile+0xd30/0xd30
[   29.062622]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   29.069080]  [<ffffffff8377395f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   29.075621] 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 
[   29.102106] RIP  [<ffffffff81434701>] __free_pages+0x21/0x90
[   29.107988]  RSP <ffff8800a9d27ab0>
[   29.111898] ---[ end trace a62f9625b54d424a ]---
[   29.116643] Kernel panic - not syncing: Fatal exception
[   29.122421] Dumping ftrace buffer:
[   29.125940]    (ftrace buffer empty)
[   29.129620] Kernel Offset: disabled
[   29.133215] Rebooting in 86400 seconds..