[   15.814246] 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: [   20.701210] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   20.967835] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.804377] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available)
[   41.124398] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available)
Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts.
[   46.519973] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available)
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[   46.659026] kasan: CONFIG_KASAN_INLINE enabled
[   46.665053] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory access
[   46.689243] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory access
[   46.700755] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   46.706695] Dumping ftrace buffer:
[   46.706697]    (ftrace buffer empty)
[   46.706699] Modules linked in:
[   46.706704] CPU: 0 PID: 3340 Comm: syzkaller652065 Not tainted 4.4.112-g5f6325b #21
[   46.706706] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.706709] task: ffff8801d0498000 task.stack: ffff8801d51d8000
[   46.706721] RIP: 0010:[<ffffffff81433a51>]  [<ffffffff81433a51>] __free_pages+0x21/0x90
[   46.706723] RSP: 0018:ffff8801d51df9c0  EFLAGS: 00010a07
[   46.706725] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825ba72b
[   46.706727] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   46.706729] RBP: ffff8801d51df9d0 R08: 0000000000000000 R09: 0000000000000001
[   46.706731] R10: 0000000000000000 R11: 1ffff1003aa3bf16 R12: 0000000000000004
[   46.706733] R13: 0000000000000020 R14: ffff8801d1dcc200 R15: dffffc0000000000
[   46.706737] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77d2b40
[   46.706739] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   46.706741] CR2: 0000000020dc8000 CR3: 00000001d0952000 CR4: 0000000000160670
[   46.706746] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.706747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.706748] Stack:
[   46.706753]  ffffffff837770a9 ffff8801d1dcc358 ffff8801d51dfa30 ffffffff825ba751
[   46.706757]  ffff8801d1dcc370 ffffed003a3b986b ffffed003a3b986e ffff8801d1dcc368
[   46.706761]  dead4ead00000000 ffff8801d1dcc340 0000000000000000 0000000000000000
[   46.706762] Call Trace:
[   46.706768]  [<ffffffff837770a9>] ? retint_kernel+0x2d/0x2d
[   46.706774]  [<ffffffff825ba751>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   46.706778]  [<ffffffff825bab15>] sg_finish_rem_req+0x2b5/0x340
[   46.706782]  [<ffffffff825bc931>] sg_read+0xa21/0x1490
[   46.706787]  [<ffffffff8123588f>] ? mark_held_locks+0xaf/0x100
[   46.706791]  [<ffffffff825bbf10>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   46.706795]  [<ffffffff815ea170>] ? fsnotify+0xee0/0xee0
[   46.706801]  [<ffffffff81b4e609>] ? avc_policy_seqno+0x9/0x20
[   46.706808]  [<ffffffff8151d211>] do_loop_readv_writev+0x141/0x1e0
[   46.706811]  [<ffffffff81b454f9>] ? security_file_permission+0x89/0x1e0
[   46.706815]  [<ffffffff825bbf10>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   46.706819]  [<ffffffff825bbf10>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   46.706822]  [<ffffffff8151fdaf>] compat_do_readv_writev+0x5df/0x6e0
[   46.706825]  [<ffffffff8151f7d0>] ? vfs_writev+0xb0/0xb0
[   46.706830]  [<ffffffff8157844b>] ? __fget+0x20b/0x3b0
[   46.706833]  [<ffffffff81578472>] ? __fget+0x232/0x3b0
[   46.706836]  [<ffffffff81578287>] ? __fget+0x47/0x3b0
[   46.706839]  [<ffffffff8151ff89>] compat_readv+0xd9/0x140
[   46.706843]  [<ffffffff81522318>] compat_SyS_readv+0xd8/0x1b0
[   46.706846]  [<ffffffff81522240>] ? SyS_pwritev+0x230/0x230
[   46.706850]  [<ffffffff8148b1fe>] ? vmacache_update+0xfe/0x130
[   46.706855]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   46.706858]  [<ffffffff81522240>] ? SyS_pwritev+0x230/0x230
[   46.706861]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   46.706866]  [<ffffffff83777e2a>] sysenter_flags_fixed+0xd/0x17
[   46.706914] Code: 26 a6 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 
[   46.706918] RIP  [<ffffffff81433a51>] __free_pages+0x21/0x90
[   46.706919]  RSP <ffff8801d51df9c0>
[   46.706923] ---[ end trace 9ef815669c1727b3 ]---
[   46.706926] Kernel panic - not syncing: Fatal exception
[   46.709108] Dumping ftrace buffer:
[   46.709110]    (ftrace buffer empty)
[   46.709111] Kernel Offset: disabled
[   47.062933] Rebooting in 86400 seconds..