[   16.700755] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [   21.870991] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.307403] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   23.076535] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available)
[   23.256573] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available)
Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts.
[   28.646255] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available)
executing program
[   28.743016] kasan: CONFIG_KASAN_INLINE enabled
[   28.747431] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.760713] Dumping ftrace buffer:
[   28.764222]    (ftrace buffer empty)
[   28.767898] Modules linked in:
[   28.771167] CPU: 0 PID: 3322 Comm: syzkaller032056 Not tainted 4.4.107-g610c835 #12
[   28.778923] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.788242] task: ffff8801d10d0000 task.stack: ffff8801d2ba8000
[   28.794260] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.802481] RSP: 0018:ffff8801d2bafab0  EFLAGS: 00010a07
[   28.807898] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   28.815140] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   28.822373] RBP: ffff8801d2bafac0 R08: 0000000000000001 R09: 0000000000000000
[   28.829607] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   28.836841] R13: 0000000000000020 R14: ffff8800b3d60000 R15: dffffc0000000000
[   28.844075] FS:  0000000002162880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   28.852268] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.858113] CR2: 000000002068cfc0 CR3: 00000000b4dc1000 CR4: 00000000001406f0
[   28.865349] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.872584] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.879823] Stack:
[   28.881933]  0000000000000000 ffff8800b3d60158 ffff8801d2bafb20 ffffffff825b8cf1
[   28.889878]  ffff8800b3d60170 ffffed00167ac02b ffffed00167ac02e ffff8800b3d60168
[   28.897826]  dead4ead00000000 ffff8800b3d60140 0000000000000000 0000000000000000
[   28.905767] Call Trace:
[   28.908321]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.914786]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   28.920810]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   28.926923]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   28.932857]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   28.938097]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   28.943858]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.950488]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   28.957464]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.964102]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   28.969520]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   28.975456]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   28.980867]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   28.986285]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   28.992136]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   28.998853]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   29.005572]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   29.011513]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   29.016752]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   29.021910]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   29.027591]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   29.034049]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   29.040590] Code: 76 ae 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 
[   29.066940] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   29.072816]  RSP <ffff8801d2bafab0>
[   29.080160] ---[ end trace d152d06e5cd2f0d4 ]---
[   29.086335] Kernel panic - not syncing: Fatal exception
[   29.092105] Dumping ftrace buffer:
[   29.095610]    (ftrace buffer empty)
[   29.099286] Kernel Offset: disabled
[   29.102878] Rebooting in 86400 seconds..