BUG: unable to handle kernel paging request at ffffeafff8c78008
IP: [<ffffffff814bc77e>] page_remove_rmap+0x2e/0x260 mm/rmap.c:1278
PGD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5646 Comm: syz-executor692 Not tainted 4.4.148-gf057ff9 #81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d6df9800 task.stack: ffff8801d7ba8000
RIP: 0010:[<ffffffff814bc77e>]  [<ffffffff814bc77e>] page_remove_rmap+0x2e/0x260 mm/rmap.c:1278
RSP: 0018:ffff8801d7baf720  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffeafff8c78000 RCX: 0000000000000000
RDX: 1ffffd5fff18f001 RSI: ffffffff814bc75f RDI: ffffeafff8c78008
RBP: ffff8801d7baf730 R08: ffffffff85302320 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8801d6df9800 R12: 0000000000000001
R13: 1ffff1003af75eea R14: ffff8800b98fb800 R15: ffffeafff8c78000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffeafff8c78008 CR3: 00000000babb5000 CR4: 00000000001606f0
Stack:
 ffff8801d7baf9b0 0000000000000001 ffff8801d7baf7d8 ffffffff8150a1f3
 00003ffe31e001e0 00003ffe31e001e0 0000000041b58ab3 ffffffff841ef82f
 ffffffff81509ff0 00000000000004f0 ffff8800b99ebc60 ffff8801d7baf7a0
Call Trace:
 [<ffffffff8150a1f3>] zap_huge_pmd+0x203/0x510 mm/huge_memory.c:1493
 [<ffffffff81498cc3>] zap_pmd_range mm/memory.c:1249 [inline]
 [<ffffffff81498cc3>] zap_pud_range mm/memory.c:1283 [inline]
 [<ffffffff81498cc3>] unmap_page_range mm/memory.c:1307 [inline]
 [<ffffffff81498cc3>] unmap_single_vma+0xea3/0x1240 mm/memory.c:1352
 [<ffffffff8149ab91>] unmap_vmas+0x81/0xd0 mm/memory.c:1382
 [<ffffffff814b34a9>] exit_mmap+0x1c9/0x3a0 mm/mmap.c:2958
 [<ffffffff81127e58>] __mmput kernel/fork.c:717 [inline]
 [<ffffffff81127e58>] mmput+0xf8/0x2d0 kernel/fork.c:737
 [<ffffffff81137ae8>] exit_mm kernel/exit.c:440 [inline]
 [<ffffffff81137ae8>] do_exit+0x8d8/0x26b0 kernel/exit.c:742
 [<ffffffff8113db31>] do_group_exit+0x111/0x330 kernel/exit.c:885
 [<ffffffff81160f2c>] get_signal+0x4ec/0x14b0 kernel/signal.c:2321
 [<ffffffff8100df4b>] do_signal+0x8b/0x1d30 arch/x86/kernel/signal.c:712
 [<ffffffff8100360a>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:249
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:284 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:349
 [<ffffffff838ca835>] int_ret_from_sys_call+0x25/0xa3
Code: e5 41 54 53 48 89 fb e8 e1 77 e9 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 de 01 00 00 <f6> 43 08 01 0f 84 4e 01 00 00 e8 b3 77 e9 ff f0 83 43 18 ff 78 
RIP  [<ffffffff814bc77e>] page_remove_rmap+0x2e/0x260 mm/rmap.c:1278
 RSP <ffff8801d7baf720>
CR2: ffffeafff8c78008
---[ end trace fb3f03926169b729 ]---