[   16.247177] random: sshd: uninitialized urandom read (32 bytes read, 32 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: [   18.842732] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   19.081772] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   19.922039] random: sshd: uninitialized urandom read (32 bytes read, 94 bits of entropy available)
[   24.564884] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available)
Warning: Permanently added '10.128.15.236' (ECDSA) to the list of known hosts.
[   29.977404] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available)
executing program
[   30.071795] kasan: CONFIG_KASAN_INLINE enabled
[   30.076548] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   30.089386] Dumping ftrace buffer:
[   30.092894]    (ftrace buffer empty)
[   30.096572] Modules linked in:
[   30.099850] CPU: 0 PID: 3311 Comm: syzkaller124427 Not tainted 4.4.113-ge70c132 #34
[   30.107611] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.116939] task: ffff8801d23ac740 task.stack: ffff8801d0a10000
[   30.122966] RIP: 0010:[<ffffffff81433721>]  [<ffffffff81433721>] __free_pages+0x21/0x90
[   30.131209] RSP: 0018:ffff8801d0a17ab0  EFLAGS: 00010a07
[   30.136625] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b6f2b
[   30.143867] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   30.151109] RBP: ffff8801d0a17ac0 R08: 0000000000000001 R09: 0000000000000000
[   30.158352] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   30.165592] R13: 0000000000000020 R14: ffff8801d053c200 R15: dffffc0000000000
[   30.172837] FS:  000000000102e880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   30.181041] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.186893] CR2: 0000000020a2f000 CR3: 00000000b5642000 CR4: 0000000000160670
[   30.194136] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.201374] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.208613] Stack:
[   30.210731]  0000000000000000 ffff8801d053c358 ffff8801d0a17b20 ffffffff825b6f51
[   30.218706]  ffff8801d053c370 ffffed003a0a786b ffffed003a0a786e ffff8801d053c368
[   30.226673]  dead4ead00000000 ffff8801d053c340 0000000000000000 0000000000000000
[   30.234656] Call Trace:
[   30.237220]  [<ffffffff825b6f51>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   30.243683]  [<ffffffff825b7315>] sg_finish_rem_req+0x2b5/0x340
[   30.249709]  [<ffffffff825b73d9>] sg_new_read.isra.18+0x39/0x3c0
[   30.255825]  [<ffffffff825b56d2>] ? sg_get_rq_mark+0x142/0x190
[   30.261781]  [<ffffffff825b903c>] sg_read+0x8bc/0x1490
[   30.267027]  [<ffffffff8122f101>] ? __lock_is_held+0xa1/0xf0
[   30.272796]  [<ffffffff825b8780>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   30.279433]  [<ffffffff8150d089>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   30.286424]  [<ffffffff825b8780>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   30.293069]  [<ffffffff8151bc93>] __vfs_read+0x103/0x440
[   30.298496]  [<ffffffff8151bb90>] ? vfs_iter_write+0x2d0/0x2d0
[   30.304438]  [<ffffffff815e829d>] ? fsnotify+0x5ad/0xee0
[   30.309869]  [<ffffffff815e8bd0>] ? fsnotify+0xee0/0xee0
[   30.315291]  [<ffffffff81b4b9c9>] ? avc_policy_seqno+0x9/0x20
[   30.321147]  [<ffffffff81b5d098>] ? selinux_file_permission+0x348/0x460
[   30.327872]  [<ffffffff81b428c9>] ? security_file_permission+0x89/0x1e0
[   30.334595]  [<ffffffff8151d820>] ? rw_verify_area+0x100/0x2f0
[   30.340537]  [<ffffffff8151db33>] vfs_read+0x123/0x3a0
[   30.345781]  [<ffffffff81520479>] SyS_read+0xd9/0x1b0
[   30.350938]  [<ffffffff815203a0>] ? do_sendfile+0xd30/0xd30
[   30.356619]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   30.363104]  [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   30.369659] Code: b6 9f 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 
[   30.396187] RIP  [<ffffffff81433721>] __free_pages+0x21/0x90
[   30.402079]  RSP <ffff8801d0a17ab0>
[   30.406002] ---[ end trace afae30b52f6734e5 ]---
[   30.410766] Kernel panic - not syncing: Fatal exception
[   30.416554] Dumping ftrace buffer:
[   30.420071]    (ftrace buffer empty)
[   30.423751] Kernel Offset: disabled
[   30.427346] Rebooting in 86400 seconds..