[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.545236] 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: [   20.213504] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   20.626785] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   21.482971] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available)
[   21.657100] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available)
Warning: Permanently added '10.128.15.229' (ECDSA) to the list of known hosts.
[   27.061639] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available)
executing program
[   27.158613] kasan: CONFIG_KASAN_INLINE enabled
[   27.163529] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.176343] Dumping ftrace buffer:
[   27.179845]    (ftrace buffer empty)
[   27.183523] Modules linked in:
[   27.186792] CPU: 0 PID: 3319 Comm: syzkaller590589 Not tainted 4.4.107-g610c835 #12
[   27.194549] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.203869] task: ffff8801d1dbc740 task.stack: ffff8800b4190000
[   27.209887] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.218112] RSP: 0018:ffff8800b4197ab0  EFLAGS: 00010a07
[   27.223524] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   27.230759] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   27.238002] RBP: ffff8800b4197ac0 R08: 0000000000000001 R09: 0000000000000000
[   27.245236] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   27.252471] R13: 0000000000000020 R14: ffff8800b4f78000 R15: dffffc0000000000
[   27.259711] FS:  00000000008dc880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   27.267902] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.273751] CR2: 0000000020001000 CR3: 00000000b0de0000 CR4: 00000000001406f0
[   27.280987] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.288222] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.295457] Stack:
[   27.297570]  0000000000000000 ffff8800b4f78158 ffff8800b4197b20 ffffffff825b8cf1
[   27.305518]  ffff8800b4f78170 ffffed00169ef02b ffffed00169ef02e ffff8800b4f78168
[   27.313469]  dead4ead00000000 ffff8800b4f78140 0000000000000000 0000000000000000
[   27.321417] Call Trace:
[   27.323984]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   27.330443]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   27.336472]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   27.342582]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   27.348518]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   27.353761]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   27.359522]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   27.366165]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   27.373145]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   27.379776]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   27.385191]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   27.391127]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   27.396541]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   27.401963]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   27.407814]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   27.414537]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   27.421263]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   27.427199]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   27.432448]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   27.437601]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   27.443279]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   27.449737]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   27.456293] 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 
[   27.482665] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.488546]  RSP <ffff8800b4197ab0>
[   27.492523] ---[ end trace d1549f61897525fe ]---
[   27.497264] Kernel panic - not syncing: Fatal exception
[   27.503144] Dumping ftrace buffer:
[   27.506652]    (ftrace buffer empty)
[   27.510325] Kernel Offset: disabled
[   27.513917] Rebooting in 86400 seconds..