[   18.628713] random: sshd: uninitialized urandom read (32 bytes read, 31 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: [   22.207197] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.470159] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   23.271029] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available)
[   24.502400] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available)
Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts.
[   29.901980] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available)
executing program
[   30.004391] kasan: CONFIG_KASAN_INLINE enabled
[   30.008840] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   30.021723] Dumping ftrace buffer:
[   30.025234]    (ftrace buffer empty)
[   30.028918] Modules linked in:
[   30.032217] CPU: 0 PID: 3742 Comm: syzkaller577730 Not tainted 4.4.116-g014c901 #16
[   30.039979] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.049343] task: ffff8801c9964800 task.stack: ffff8800bb150000
[   30.055371] RIP: 0010:[<ffffffff81434881>]  [<ffffffff81434881>] __free_pages+0x21/0x90
[   30.063707] RSP: 0018:ffff8800bb157ab0  EFLAGS: 00010a07
[   30.069136] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b889b
[   30.076382] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   30.083624] RBP: ffff8800bb157ac0 R08: 0000000000000000 R09: 0000000000000000
[   30.090867] R10: 0000000000000000 R11: 1ffff1001762af34 R12: 0000000000000004
[   30.098119] R13: 0000000000000020 R14: ffff8800abcf4200 R15: dffffc0000000000
[   30.105361] FS:  0000000002278880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   30.113556] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.119420] CR2: 00000000205c5fc7 CR3: 00000000b5edc000 CR4: 0000000000160670
[   30.126665] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.133905] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.141201] Stack:
[   30.143329]  ffffffff83775629 ffff8800abcf4358 ffff8800bb157b20 ffffffff825b88c1
[   30.151303]  ffff8800abcf4370 ffffed001579e86b ffffed001579e86e ffff8800abcf4368
[   30.159307]  dead4ead00000000 ffff8800abcf4340 0000000000000000 0000000000000000
[   30.167275] Call Trace:
[   30.169846]  [<ffffffff83775629>] ? retint_kernel+0x2d/0x2d
[   30.175534]  [<ffffffff825b88c1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   30.181998]  [<ffffffff825b8c85>] sg_finish_rem_req+0x2b5/0x340
[   30.188026]  [<ffffffff825b9046>] sg_new_read.isra.18+0x336/0x3c0
[   30.194228]  [<ffffffff825ba9ac>] sg_read+0x8bc/0x1490
[   30.199477]  [<ffffffff825ba0f0>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   30.206142]  [<ffffffff8144a564>] ? __lru_cache_add+0x164/0x240
[   30.212185]  [<ffffffff8150e1f9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   30.219171]  [<ffffffff825ba0f0>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   30.225809]  [<ffffffff8151cfb3>] __vfs_read+0x103/0x440
[   30.231229]  [<ffffffff8151ceb0>] ? vfs_iter_write+0x2d0/0x2d0
[   30.237173]  [<ffffffff815e98ad>] ? fsnotify+0x5ad/0xee0
[   30.242596]  [<ffffffff815ea1e0>] ? fsnotify+0xee0/0xee0
[   30.248023]  [<ffffffff81b4d099>] ? avc_policy_seqno+0x9/0x20
[   30.253894]  [<ffffffff81b5e768>] ? selinux_file_permission+0x348/0x460
[   30.260621]  [<ffffffff81b43f99>] ? security_file_permission+0x89/0x1e0
[   30.267354]  [<ffffffff8151eb40>] ? rw_verify_area+0x100/0x2f0
[   30.273302]  [<ffffffff8151ee53>] vfs_read+0x123/0x3a0
[   30.278547]  [<ffffffff81521799>] SyS_read+0xd9/0x1b0
[   30.283706]  [<ffffffff815216c0>] ? do_sendfile+0xd30/0xd30
[   30.289387]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   30.295857]  [<ffffffff83774a1f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   30.302416] Code: c6 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 
[   30.329144] RIP  [<ffffffff81434881>] __free_pages+0x21/0x90
[   30.335040]  RSP <ffff8800bb157ab0>
[   30.338944] ---[ end trace b0f9bc9cf891123d ]---
[   30.344286] Kernel panic - not syncing: Fatal exception
[   30.349979] Dumping ftrace buffer:
[   30.353498]    (ftrace buffer empty)
[   30.357287] Kernel Offset: disabled
[   30.360888] Rebooting in 86400 seconds..