flags: 0x8000000000004004(referenced
keychord: using input dev AT Translated Set 2 keyboard for fevent
|head)
page dumped because: VM_BUG_ON_PAGE(!PageLocked(page))
------------[ cut here ]------------
kernel BUG at mm/filemap.c:817!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 8493 Comm: syz-executor6 Not tainted 4.4.152-ge5c5f1f #89
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cec7c800 task.stack: ffff8800b5fa8000
RIP: 0010:[<ffffffff814213c5>]  [<ffffffff814213c5>] unlock_page+0x115/0x150 mm/filemap.c:817
RSP: 0018:ffff8800b5faf8a0  EFLAGS: 00010206
RAX: ffffffff83a6f940 RBX: ffffea0007338000 RCX: ffffc9000685e000
RDX: 00000000000144b0 RSI: ffffffff81519559 RDI: ffff8801cec7d0dc
RBP: ffff8800b5faf8c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffea0007338300 R14: ffffea0007338008 R15: ffff8800b5faf988
FS:  00007f98fc8f8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61c020d000 CR3: 00000001d0114000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffea0007338000 dffffc0000000000 ffffea0007338300 ffffea0007338008
 ffff8800b5faf9b0 ffffffff812cf20d ffff8801d9bc5b00 ffff8800b5fafaf8
 ffff8800b660ca00 1ffff10016bf5f25 0000000100000000 ffff8800b5fafae8
Call Trace:
 [<ffffffff812cf20d>] get_futex_key+0x8ad/0xdc0 kernel/futex.c:598
 [<ffffffff812d0ec7>] futex_requeue+0x1e7/0x1690 kernel/futex.c:1780
 [<ffffffff812d39d4>] do_futex+0x204/0x17f0 kernel/futex.c:3248
 [<ffffffff812d51b0>] SYSC_futex kernel/futex.c:3286 [inline]
 [<ffffffff812d51b0>] SyS_futex+0x1f0/0x300 kernel/futex.c:3254
 [<ffffffff838cc565>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: e8 48 8d 04 c0 49 8d 3c c6 e8 88 bd df ff 5b 41 5c 41 5d 41 5e 5d c3 e8 8a 31 f3 ff 48 c7 c6 e0 bb a9 83 48 89 df e8 bb ee 06 00 <0f> 0b 48 89 df e8 51 d3 0d 00 e9 0a ff ff ff e8 47 d3 0d 00 e9 
RIP  [<ffffffff814213c5>] unlock_page+0x115/0x150 mm/filemap.c:817
 RSP <ffff8800b5faf8a0>
---[ end trace 6f092d5623b311ac ]---