[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.395295] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   20.577395] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   21.011179] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   21.787597] random: sshd: uninitialized urandom read (32 bytes read, 89 bits of entropy available)
[   26.643823] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available)
Warning: Permanently added '10.128.15.232' (ECDSA) to the list of known hosts.
[   32.017398] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available)
executing program
[   32.127249] sg_write: data in/out 262108/32 bytes for SCSI command 0x0-- guessing data in;
[   32.127249]    program syzkaller893471 not setting count and/or reply_len properly
[   32.144506] kasan: CONFIG_KASAN_INLINE enabled
[   32.148980] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   32.161799] Dumping ftrace buffer:
[   32.165307]    (ftrace buffer empty)
[   32.169012] Modules linked in:
[   32.172295] CPU: 1 PID: 3315 Comm: syzkaller893471 Not tainted 4.4.111-g3301b55 #17
[   32.180062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.189389] task: ffff8800b50ddf00 task.stack: ffff8801ccdf8000
[   32.195413] RIP: 0010:[<ffffffff81433621>]  [<ffffffff81433621>] __free_pages+0x21/0x90
[   32.203646] RSP: 0018:ffff8801ccdffa40  EFLAGS: 00010a07
[   32.209071] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb
[   32.216316] RDX: 1bd5a9d5a0000003 RSI: 0000000000000008 RDI: dead4ead0000001c
[   32.223563] RBP: ffff8801ccdffa50 R08: 0000000000000001 R09: 0000000000000001
[   32.230802] R10: 0000000000000000 R11: 1ffff100399bff26 R12: 0000000000000004
[   32.238044] R13: 0000000000000020 R14: ffff8800b4c62100 R15: dffffc0000000000
[   32.245295] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009e98840
[   32.253498] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   32.259348] CR2: 0000000020db9000 CR3: 00000001d50fe000 CR4: 0000000000160670
[   32.266588] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.273824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.281062] Stack:
[   32.283178]  ffffffff837764a9 ffff8800b4c62258 ffff8801ccdffab0 ffffffff825b9ee1
[   32.291140]  ffff8800b4c62270 ffffed001698c44b ffffed001698c44e ffff8800b4c62268
[   32.299099]  dead4ead00000000 ffff8800b4c62240 0000000000000000 0000000000000000
[   32.307050] Call Trace:
[   32.309606]  [<ffffffff837764a9>] ? retint_kernel+0x2d/0x2d
[   32.315285]  [<ffffffff825b9ee1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   32.321744]  [<ffffffff825ba2a5>] sg_finish_rem_req+0x2b5/0x340
[   32.327768]  [<ffffffff825ba666>] sg_new_read.isra.18+0x336/0x3c0
[   32.333969]  [<ffffffff825bbf62>] sg_read+0x8c2/0x1490
[   32.339217]  [<ffffffff81437310>] ? __alloc_pages_direct_compact+0x250/0x250
[   32.346381]  [<ffffffff825bb6a0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   32.353026]  [<ffffffff8122f161>] ? __lock_is_held+0xa1/0xf0
[   32.358790]  [<ffffffff825bb6a0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   32.365439]  [<ffffffff8151c383>] __vfs_read+0x103/0x440
[   32.370868]  [<ffffffff8151c280>] ? vfs_iter_write+0x2d0/0x2d0
[   32.376807]  [<ffffffff815e927d>] ? fsnotify+0x5ad/0xee0
[   32.382221]  [<ffffffff815e9bb0>] ? fsnotify+0xee0/0xee0
[   32.387637]  [<ffffffff83774d5c>] ? _raw_spin_unlock+0x2c/0x50
[   32.393587]  [<ffffffff81b4dfe9>] ? avc_policy_seqno+0x9/0x20
[   32.399442]  [<ffffffff81b5f6d8>] ? selinux_file_permission+0x348/0x460
[   32.406168]  [<ffffffff81b44ed9>] ? security_file_permission+0x89/0x1e0
[   32.412896]  [<ffffffff8151df10>] ? rw_verify_area+0x100/0x2f0
[   32.418836]  [<ffffffff8151e223>] vfs_read+0x123/0x3a0
[   32.424080]  [<ffffffff81520b69>] SyS_read+0xd9/0x1b0
[   32.429245]  [<ffffffff81520a90>] ? do_sendfile+0xd30/0xd30
[   32.434937]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   32.441147]  [<ffffffff81520a90>] ? do_sendfile+0xd30/0xd30
[   32.446823]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   32.452936]  [<ffffffff8377722a>] sysenter_flags_fixed+0xd/0x17
[   32.458967] Code: 96 a4 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 
[   32.485418] RIP  [<ffffffff81433621>] __free_pages+0x21/0x90
[   32.491307]  RSP <ffff8801ccdffa40>
[   32.495196] ---[ end trace a632fbf4e9ade90f ]---
[   32.500242] Kernel panic - not syncing: Fatal exception
[   32.506058] Dumping ftrace buffer:
[   32.509563]    (ftrace buffer empty)
[   32.513240] Kernel Offset: disabled
[   32.516839] Rebooting in 86400 seconds..