[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.352778] 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: [   21.365793] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   21.695476] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   22.464541] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available)
[   25.805866] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available)
Warning: Permanently added '10.128.0.36' (ECDSA) to the list of known hosts.
[   31.200780] random: sshd: uninitialized urandom read (32 bytes read, 97 bits of entropy available)
executing program
[   31.296977] kasan: CONFIG_KASAN_INLINE enabled
[   31.301758] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   31.314552] Dumping ftrace buffer:
[   31.318057]    (ftrace buffer empty)
[   31.321731] Modules linked in:
[   31.324999] CPU: 0 PID: 3314 Comm: syzkaller358931 Not tainted 4.4.107-g610c835 #4
[   31.332675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.341995] task: ffff8800b4c517c0 task.stack: ffff8801d05f8000
[   31.348016] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   31.356239] RSP: 0018:ffff8801d05ffa40  EFLAGS: 00010a07
[   31.361652] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   31.368888] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   31.376122] RBP: ffff8801d05ffa50 R08: 0000000000000001 R09: 0000000000000000
[   31.383357] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   31.390601] R13: 0000000000000020 R14: ffff8801d0b08000 R15: dffffc0000000000
[   31.397836] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008d9b840
[   31.406027] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   31.411873] CR2: 0000000020e6f000 CR3: 00000001d21a6000 CR4: 00000000001406f0
[   31.419110] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.426344] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.433577] Stack:
[   31.435688]  0000000000000000 ffff8801d0b08158 ffff8801d05ffab0 ffffffff825b8cf1
[   31.443633]  ffff8801d0b08170 ffffed003a16102b ffffed003a16102e ffff8801d0b08168
[   31.451577]  dead4ead00000000 ffff8801d0b08140 0000000000000000 0000000000000000
[   31.459524] Call Trace:
[   31.462081]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   31.468538]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   31.474559]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   31.480667]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   31.486600]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   31.491844]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   31.498475]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   31.505106]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   31.510519]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   31.516456]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   31.521873]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   31.527290]  [<ffffffff8149ea35>] ? handle_mm_fault+0xbf5/0x3190
[   31.533421]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   31.539271]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   31.545988]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   31.552705]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   31.558642]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   31.563883]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   31.569037]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   31.574721]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   31.580919]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   31.586595]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   31.592706]  [<ffffffff837754d7>] sysenter_flags_fixed+0xd/0x17
[   31.598724] 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 
[   31.625026] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   31.630908]  RSP <ffff8801d05ffa40>
[   31.634950] ---[ end trace d979008a6143b7c3 ]---
[   31.640829] Kernel panic - not syncing: Fatal exception
[   31.646602] Dumping ftrace buffer:
[   31.650113]    (ftrace buffer empty)
[   31.653795] Kernel Offset: disabled
[   31.657384] Rebooting in 86400 seconds..