[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   18.727345] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.002910] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.332433] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   23.246704] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available)
[   23.419495] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available)
Warning: Permanently added '10.128.15.211' (ECDSA) to the list of known hosts.
[   28.817670] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available)
executing program
[   28.959479] kasan: CONFIG_KASAN_INLINE enabled
[   28.963933] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.976974] Dumping ftrace buffer:
[   28.980478]    (ftrace buffer empty)
[   28.984160] Modules linked in:
[   28.987432] CPU: 0 PID: 3308 Comm: syzkaller219541 Not tainted 4.4.107-g610c835 #4
[   28.995100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.004420] task: ffff8800b5152f80 task.stack: ffff8801d1e80000
[   29.010441] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   29.018674] RSP: 0018:ffff8801d1e87970  EFLAGS: 00010a07
[   29.024088] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   29.031324] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
[   29.038568] RBP: ffff8801d1e87980 R08: 0000000000000001 R09: 0000000000000000
[   29.045812] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   29.053048] R13: 0000000000000020 R14: ffff8801d16f4200 R15: dffffc0000000000
[   29.060285] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008df7840
[   29.068476] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   29.074320] CR2: 0000000020f45fc8 CR3: 00000000b0eca000 CR4: 00000000001406f0
[   29.081557] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.088792] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.096028] Stack:
[   29.098140]  0000000000000000 ffff8801d16f4358 ffff8801d1e879e0 ffffffff825b8cf1
[   29.106093]  ffff8801d16f4370 ffffed003a2de86b ffffed003a2de86e ffff8801d16f4368
[   29.114049]  dead4ead00000000 ffff8801d16f4340 0000000000000000 0000000000000000
[   29.122059] Call Trace:
[   29.124617]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   29.131075]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   29.137098]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   29.143207]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   29.149144]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   29.154386]  [<ffffffff810dbb17>] ? do_page_fault+0x27/0x30
[   29.160066]  [<ffffffff83775058>] ? page_fault+0x28/0x30
[   29.165491]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   29.172122]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   29.177539]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   29.183390]  [<ffffffff8151b341>] do_loop_readv_writev+0x141/0x1e0
[   29.189672]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   29.196389]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   29.203018]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   29.209648]  [<ffffffff8151dedf>] compat_do_readv_writev+0x5df/0x6e0
[   29.216105]  [<ffffffff8151d900>] ? vfs_writev+0xb0/0xb0
[   29.221521]  [<ffffffff8151e0b9>] compat_readv+0xd9/0x140
[   29.227024]  [<ffffffff81520448>] compat_SyS_readv+0xd8/0x1b0
[   29.232873]  [<ffffffff81520370>] ? SyS_pwritev+0x230/0x230
[   29.238550]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   29.244745]  [<ffffffff81520370>] ? SyS_pwritev+0x230/0x230
[   29.250420]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   29.256532]  [<ffffffff837754d7>] sysenter_flags_fixed+0xd/0x17
[   29.262549] 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 
[   29.288879] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   29.294758]  RSP <ffff8801d1e87970>
[   29.298740] ---[ end trace 2bccd830cd6dda8b ]---
[   29.303483] Kernel panic - not syncing: Fatal exception
[   29.309296] Dumping ftrace buffer:
[   29.312801]    (ftrace buffer empty)
[   29.316478] Kernel Offset: disabled
[   29.320069] Rebooting in 86400 seconds..