flags: 0x8000000000040078(uptodate|dirty
IPVS: set_ctl: invalid protocol: 29 172.20.20.170:20004
|lru|active|swapbacked)
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: 1 PID: 17666 Comm: syz-executor3 Not tainted 4.4.151-g37af2ff #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b7a60000 task.stack: ffff8801d2190000
RIP: 0010:[<ffffffff81421495>]  [<ffffffff81421495>] unlock_page+0x115/0x150 mm/filemap.c:817
RSP: 0018:ffff8801d2197a40  EFLAGS: 00010212
RAX: 0000000000000000 RBX: ffffea0006afa700 RCX: ffffc90003669000
RDX: 000000000003b56c RSI: ffffffff81519469 RDI: ffff8800b7a608dc
RBP: ffff8801d2197a60 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000364000 R14: ffff8801d2197d10 R15: ffffea0006afa700
FS:  00007f0ffa7b1700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7924ab1db8 CR3: 00000001c9f3b000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffea0006afa700 0000000000000001 0000000000364000 ffff8801d2197d10
 ffff8801d2197a80 ffffffff8143c4e6 0000000000001000 0000000000001000
 ffff8801d2197c40 ffffffff814cc2ab ffff8800b955a100 0000000020000714
Call Trace:
 [<ffffffff8143c4e6>] set_page_dirty_lock+0x46/0x60 mm/page-writeback.c:2583
 [<ffffffff814cc2ab>] process_vm_rw_pages mm/process_vm_access.c:50 [inline]
 [<ffffffff814cc2ab>] process_vm_rw_single_vec mm/process_vm_access.c:111 [inline]
 [<ffffffff814cc2ab>] process_vm_rw_core.isra.1+0x51b/0x990 mm/process_vm_access.c:210
 [<ffffffff814cc933>] process_vm_rw+0x213/0x230 mm/process_vm_access.c:277
 [<ffffffff814ccc27>] SYSC_process_vm_writev mm/process_vm_access.c:299 [inline]
 [<ffffffff814ccc27>] SyS_process_vm_writev+0x47/0x60 mm/process_vm_access.c:294
 [<ffffffff838cc125>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: e8 48 8d 04 c0 49 8d 3c c6 e8 b8 bc df ff 5b 41 5c 41 5d 41 5e 5d c3 e8 7a 31 f3 ff 48 c7 c6 e0 bb a9 83 48 89 df e8 bb ee 06 00 <0f> 0b 48 89 df e8 91 d1 0d 00 e9 0a ff ff ff e8 87 d1 0d 00 e9 
RIP  [<ffffffff81421495>] unlock_page+0x115/0x150 mm/filemap.c:817
 RSP <ffff8801d2197a40>
---[ end trace 671e17c95adb55ca ]---