[   16.256821] 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: [   20.958430] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   21.239043] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   22.175118] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available)
[   22.349066] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available)
Warning: Permanently added '10.128.0.41' (ECDSA) to the list of known hosts.
[   27.729013] random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available)
executing program
[   27.824803] sg_write: data in/out 262108/32 bytes for SCSI command 0x0-- guessing data in;
[   27.824803]    program syzkaller923555 not setting count and/or reply_len properly
[   27.842235] kasan: CONFIG_KASAN_INLINE enabled
[   27.846650] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.859466] Dumping ftrace buffer:
[   27.862990]    (ftrace buffer empty)
[   27.866667] Modules linked in:
[   27.869940] CPU: 0 PID: 3325 Comm: syzkaller923555 Not tainted 4.4.111-g3301b55 #24
[   27.877697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.887017] task: ffff8801d0128000 task.stack: ffff8801d00d8000
[   27.893036] RIP: 0010:[<ffffffff81433621>]  [<ffffffff81433621>] __free_pages+0x21/0x90
[   27.901277] RSP: 0018:ffff8801d00dfab0  EFLAGS: 00010a07
[   27.906691] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb
[   27.913926] RDX: 1bd5a9d5a0000003 RSI: 0000000000000008 RDI: dead4ead0000001c
[   27.921163] RBP: ffff8801d00dfac0 R08: 0000000000000001 R09: 0000000000000001
[   27.928401] R10: 0000000000000000 R11: 1ffff1003a01bf34 R12: 0000000000000004
[   27.935638] R13: 0000000000000020 R14: ffff8800b4270000 R15: dffffc0000000000
[   27.942882] FS:  0000000000fb0880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   27.951072] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.956918] CR2: 0000000020db9000 CR3: 00000000b630a000 CR4: 0000000000160670
[   27.964155] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.971392] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.978635] Stack:
[   27.980749]  ffffffff837764a9 ffff8800b4270158 ffff8801d00dfb20 ffffffff825b9ee1
[   27.988703]  ffff8800b4270170 ffffed001684e02b ffffed001684e02e ffff8800b4270168
[   27.996651]  dead4ead00000000 ffff8800b4270140 0000000000000000 0000000000000000
[   28.004605] Call Trace:
[   28.007160]  [<ffffffff837764a9>] ? retint_kernel+0x2d/0x2d
[   28.012841]  [<ffffffff825b9ee1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.019300]  [<ffffffff825ba2a5>] sg_finish_rem_req+0x2b5/0x340
[   28.025425]  [<ffffffff825ba666>] sg_new_read.isra.18+0x336/0x3c0
[   28.031625]  [<ffffffff825bbf62>] sg_read+0x8c2/0x1490
[   28.036869]  [<ffffffff8122f161>] ? __lock_is_held+0xa1/0xf0
[   28.042633]  [<ffffffff825bb6a0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.049266]  [<ffffffff8150d6d9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   28.056243]  [<ffffffff825bb6a0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.062884]  [<ffffffff8151c383>] __vfs_read+0x103/0x440
[   28.068304]  [<ffffffff8151c280>] ? vfs_iter_write+0x2d0/0x2d0
[   28.074241]  [<ffffffff815e927d>] ? fsnotify+0x5ad/0xee0
[   28.079654]  [<ffffffff815e9bb0>] ? fsnotify+0xee0/0xee0
[   28.085069]  [<ffffffff81b4dfe9>] ? avc_policy_seqno+0x9/0x20
[   28.090917]  [<ffffffff81b5f6d8>] ? selinux_file_permission+0x348/0x460
[   28.097633]  [<ffffffff81b44ed9>] ? security_file_permission+0x89/0x1e0
[   28.104352]  [<ffffffff8151df10>] ? rw_verify_area+0x100/0x2f0
[   28.110311]  [<ffffffff8151e223>] vfs_read+0x123/0x3a0
[   28.115558]  [<ffffffff81520b69>] SyS_read+0xd9/0x1b0
[   28.120718]  [<ffffffff81520a90>] ? do_sendfile+0xd30/0xd30
[   28.126396]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   28.132854]  [<ffffffff83775899>] entry_SYSCALL_64_fastpath+0x16/0x92
[   28.139394] 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 
[   28.165720] RIP  [<ffffffff81433621>] __free_pages+0x21/0x90
[   28.171600]  RSP <ffff8801d00dfab0>
[   28.175444] ---[ end trace e6178bc79e7e4db1 ]---
[   28.180177] Kernel panic - not syncing: Fatal exception
[   28.185967] Dumping ftrace buffer:
[   28.189479]    (ftrace buffer empty)
[   28.193160] Kernel Offset: disabled
[   28.196754] Rebooting in 86400 seconds..