[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   22.402819] 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: [   26.144679] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   26.535228] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available)
[   27.534239] random: nonblocking pool is initialized
Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
[   33.315825] page:ffffea0007198000 count:2 mapcount:0 mapping:          (null) index:0x0
[   33.329755] flags: 0x8000000000004004(referenced|head)
[   33.335574] page dumped because: VM_BUG_ON_PAGE(!PageLocked(page))
[   33.342354] ------------[ cut here ]------------
[   33.347099] kernel BUG at mm/filemap.c:819!
[   33.351392] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   33.357218] Dumping ftrace buffer:
[   33.360739]    (ftrace buffer empty)
[   33.364890] Modules linked in:
[   33.368183] CPU: 1 PID: 3850 Comm: syz-executor396 Not tainted 4.4.130-g12ef385 #27
[   33.375960] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.385291] task: ffff8801d9478000 task.stack: ffff8800bb908000
[   33.391323] RIP: 0010:[<ffffffff8141df55>]  [<ffffffff8141df55>] unlock_page+0x115/0x150
[   33.399660] RSP: 0018:ffff8800bb90f760  EFLAGS: 00010293
[   33.405271] RAX: ffffffff83a6e7c0 RBX: ffffea0007198000 RCX: 0000000000000000
[   33.412515] RDX: 0000000000000000 RSI: ffffffff81513389 RDI: ffff8801d94788dc
[   33.419756] RBP: ffff8800bb90f780 R08: 0000000000000001 R09: 0000000000000000
[   33.427000] R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
[   33.434247] R13: ffff8800bb90fa30 R14: ffffea0007199480 R15: ffffea0007198008
[   33.441490] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f76feb40
[   33.449688] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   33.455544] CR2: 0000000020000080 CR3: 00000000b26b3000 CR4: 00000000001606f0
[   33.462791] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.470034] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.477284] Stack:
[   33.479405]  ffffea0007198000 dffffc0000000000 ffff8800bb90fa30 ffffea0007199480
[   33.487385]  ffff8800bb90f868 ffffffff812cc1bc 0000000000000001 ffff8800bb90f818
[   33.495371]  0000000000000046 ffff8801d9789900 00000000d94788d8 ffff8800bb90fa40
[   33.503350] Call Trace:
[   33.505914]  [<ffffffff812cc1bc>] get_futex_key+0xadc/0xd80
[   33.511597]  [<ffffffff812cb6e0>] ? futex_lock_pi_atomic+0x2b0/0x2b0
[   33.518062]  [<ffffffff838beaa5>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   33.524969]  [<ffffffff812cc999>] futex_wait_setup+0xd9/0x330
[   33.530824]  [<ffffffff812cc8c0>] ? futex_wake+0x460/0x460
[   33.536424]  [<ffffffff8129d143>] ? __hrtimer_init+0x143/0x1e0
[   33.542365]  [<ffffffff812cce9f>] futex_wait+0x2af/0x600
[   33.547788]  [<ffffffff812ccbf0>] ? futex_wait_setup+0x330/0x330
[   33.553908]  [<ffffffff810cc640>] ? native_set_pte_at+0xe0/0xe0
[   33.559940]  [<ffffffff81508bcd>] ? do_huge_pmd_anonymous_page+0x52d/0x9d0
[   33.566923]  [<ffffffff8129b4a0>] ? clock_was_set_work+0x30/0x30
[   33.573038]  [<ffffffff812d07b2>] do_futex+0x2a2/0x1770
[   33.578373]  [<ffffffff812d0510>] ? exit_robust_list+0x220/0x220
[   33.584493]  [<ffffffff838c0129>] ? retint_kernel+0x2d/0x2d
[   33.590176]  [<ffffffff8122e69b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   33.596986]  [<ffffffff8129a70a>] ? ktime_add_safe+0xea/0x150
[   33.602839]  [<ffffffff8129a620>] ? SyS_alarm+0x20/0x20
[   33.608176]  [<ffffffff810cbeb3>] ? kvm_clock_read+0x23/0x40
[   33.613945]  [<ffffffff810cbed9>] ? kvm_clock_get_cycles+0x9/0x10
[   33.620155]  [<ffffffff812d281d>] ? compat_SyS_futex+0x26d/0x2f0
[   33.626273]  [<ffffffff812d2789>] compat_SyS_futex+0x1d9/0x2f0
[   33.632216]  [<ffffffff812d25b0>] ? compat_SyS_get_robust_list+0x310/0x310
[   33.639201]  [<ffffffff810d724e>] ? __bad_area_nosemaphore+0x21e/0x310
[   33.645837]  [<ffffffff81006b4b>] ? do_fast_syscall_32+0xdb/0x8b0
[   33.652050]  [<ffffffff812d25b0>] ? compat_SyS_get_robust_list+0x310/0x310
[   33.659035]  [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0
[   33.665151]  [<ffffffff838c0e6a>] sysenter_flags_fixed+0xd/0x17
[   33.671175] Code: e8 48 8d 04 c0 49 8d 3c c6 e8 08 bf df ff 5b 41 5c 41 5d 41 5e 5d c3 e8 9a 32 f3 ff 48 c7 c6 60 aa a9 83 48 89 df e8 4b eb 06 00 <0f> 0b 48 89 df e8 f1 b1 0d 00 e9 0a ff ff ff e8 e7 b1 0d 00 e9 
[   33.698036] RIP  [<ffffffff8141df55>] unlock_page+0x115/0x150
[   33.704012]  RSP <ffff8800bb90f760>
[   33.707831] ---[ end trace 61fa975778a7fefb ]---
[   33.713232] Kernel panic - not syncing: Fatal exception
[   33.719135] Dumping ftrace buffer:
[   33.722651]    (ftrace buffer empty)
[   33.726332] Kernel Offset: disabled
[   33.729935] Rebooting in 86400 seconds..