[   19.973622] random: sshd: uninitialized urandom read (32 bytes read, 34 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.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   21.251465] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   21.421539] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   22.417322] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available)
[   22.582906] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available)
Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts.
[   27.988398] random: nonblocking pool is initialized
executing program
[   28.088452] kasan: CONFIG_KASAN_INLINE enabled
[   28.093252] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.106084] Dumping ftrace buffer:
[   28.109588]    (ftrace buffer empty)
[   28.113265] Modules linked in:
[   28.116538] CPU: 0 PID: 3728 Comm: syzkaller963814 Not tainted 4.4.118-g239a415 #25
[   28.124295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.133614] task: ffff8801c9874800 task.stack: ffff8800bb898000
[   28.139640] RIP: 0010:[<ffffffff814346c1>]  [<ffffffff814346c1>] __free_pages+0x21/0x90
[   28.147877] RSP: 0018:ffff8800bb89fab0  EFLAGS: 00010a07
[   28.153291] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b855b
[   28.160529] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   28.167768] RBP: ffff8800bb89fac0 R08: 0000000000000001 R09: 0000000000000001
[   28.175004] R10: 0000000000000000 R11: 1ffff10017713f34 R12: 0000000000000004
[   28.182241] R13: 0000000000000020 R14: ffff8800ae754200 R15: dffffc0000000000
[   28.189478] FS:  0000000001726880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   28.197676] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.203523] CR2: 0000000020000080 CR3: 00000000acc18000 CR4: 0000000000160670
[   28.210765] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.218006] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.225240] Stack:
[   28.227355]  ffffffff83773669 ffff8800ae754358 ffff8800bb89fb20 ffffffff825b8581
[   28.235311]  ffff8800ae754370 ffffed0015cea86b ffffed0015cea86e ffff8800ae754368
[   28.243266]  dead4ead00000000 ffff8800ae754340 0000000000000000 0000000000000000
[   28.251244] Call Trace:
[   28.253804]  [<ffffffff83773669>] ? retint_kernel+0x2d/0x2d
[   28.259503]  [<ffffffff825b8581>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.265970]  [<ffffffff825b8945>] sg_finish_rem_req+0x2b5/0x340
[   28.271997]  [<ffffffff825b8d06>] sg_new_read.isra.18+0x336/0x3c0
[   28.278198]  [<ffffffff825ba66c>] sg_read+0x8bc/0x1490
[   28.283444]  [<ffffffff81230151>] ? __lock_is_held+0xa1/0xf0
[   28.289209]  [<ffffffff825b9db0>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   28.295846]  [<ffffffff8150e139>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   28.302825]  [<ffffffff825b9db0>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   28.309457]  [<ffffffff8151cef3>] __vfs_read+0x103/0x440
[   28.314875]  [<ffffffff8151cdf0>] ? vfs_iter_write+0x2d0/0x2d0
[   28.320811]  [<ffffffff815e97ed>] ? fsnotify+0x5ad/0xee0
[   28.326230]  [<ffffffff815ea120>] ? fsnotify+0xee0/0xee0
[   28.331654]  [<ffffffff81b4d189>] ? avc_policy_seqno+0x9/0x20
[   28.337509]  [<ffffffff81b5e858>] ? selinux_file_permission+0x348/0x460
[   28.344229]  [<ffffffff81b44089>] ? security_file_permission+0x89/0x1e0
[   28.350957]  [<ffffffff8151ea80>] ? rw_verify_area+0x100/0x2f0
[   28.356897]  [<ffffffff8151ed93>] vfs_read+0x123/0x3a0
[   28.362140]  [<ffffffff815216d9>] SyS_read+0xd9/0x1b0
[   28.367300]  [<ffffffff81521600>] ? do_sendfile+0xd30/0xd30
[   28.372980]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   28.379441]  [<ffffffff83772a5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   28.385984] 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 
[   28.412482] RIP  [<ffffffff814346c1>] __free_pages+0x21/0x90
[   28.418369]  RSP <ffff8800bb89fab0>
[   28.422424] ---[ end trace ab697049b55ee8dd ]---
[   28.427168] Kernel panic - not syncing: Fatal exception
[   28.432942] Dumping ftrace buffer:
[   28.436458]    (ftrace buffer empty)
[   28.440137] Kernel Offset: disabled
[   28.443733] Rebooting in 86400 seconds..