BUG: unable to handle kernel paging request at ffffeafff9298020
IP: [<ffffffff8150dfa8>] __read_once_size include/linux/compiler.h:218 [inline]
IP: [<ffffffff8150dfa8>] compound_head include/linux/page-flags.h:415 [inline]
IP: [<ffffffff8150dfa8>] page_count include/linux/mm.h:470 [inline]
IP: [<ffffffff8150dfa8>] __split_huge_page_pmd+0x2c8/0x810 mm/huge_memory.c:3029
PGD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 17704 Comm: syz-executor1 Not tainted 4.4.149-gf76bdbd #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801bd71b000 task.stack: ffff8801d1bd8000
RIP: 0010:[<ffffffff8150dfa8>]  [<ffffffff8150dfa8>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff8150dfa8>]  [<ffffffff8150dfa8>] compound_head include/linux/page-flags.h:415 [inline]
RIP: 0010:[<ffffffff8150dfa8>]  [<ffffffff8150dfa8>] page_count include/linux/mm.h:470 [inline]
RIP: 0010:[<ffffffff8150dfa8>]  [<ffffffff8150dfa8>] __split_huge_page_pmd+0x2c8/0x810 mm/huge_memory.c:3029
RSP: 0018:ffff8801d1bdfac8  EFLAGS: 00010246
RAX: 1ffffd5fff253004 RBX: ffffeafff9298020 RCX: ffffc90002a27000
RDX: 00000000000000ae RSI: ffffffff8150df70 RDI: 00003ffe4a6001e0
RBP: ffff8801d1bdfbd0 R08: ffffffff8533b500 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8801bd71b000 R12: ffffeafff9298000
R13: dffffc0000000000 R14: ffff8800b1cba800 R15: ffff8800b1cba800
FS:  00007f947a255700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffeafff9298020 CR3: 00000000b59ae000 CR4: 00000000001606f0
Stack:
 ffffffff814abf35 ffff8801bd71b920 ffffffff853d1f10 fffffbfff0882602
 ffff8801bd71b8d8 ffff8801bd71b928 ffff8801bd71b8e0 ffff8801d8af7cb8
 1ffff1003a37bf69 ffff880131cba000 0000000000000000 0000000020200000
Call Trace:
 [<ffffffff8150fb0a>] split_huge_page_pmd_mm+0x7a/0x90 mm/huge_memory.c:3058
 [<ffffffff8150fcf1>] split_huge_page_address+0x1d1/0x220 mm/huge_memory.c:3085
 [<ffffffff8150ff5b>] vma_adjust_trans_huge+0x21b/0x2c0 mm/huge_memory.c:3111
 [<ffffffff814aaf30>] vma_adjust+0xd50/0x13d0 mm/mmap.c:833
 [<ffffffff814abb7f>] __split_vma.isra.40+0x5cf/0x750 mm/mmap.c:2584
 [<ffffffff814abf35>] do_munmap+0x235/0xe50 mm/mmap.c:2663
 [<ffffffff814b95ea>] mremap_to mm/mremap.c:415 [inline]
 [<ffffffff814b95ea>] SYSC_mremap mm/mremap.c:505 [inline]
 [<ffffffff814b95ea>] SyS_mremap+0x8aa/0xd90 mm/mremap.c:472
 [<ffffffff838ca665>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: 48 c1 eb 06 48 01 d8 48 8d 58 20 48 89 85 68 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 28 00 0f 85 e7 04 00 00 4c 8b a5 68 ff ff ff <4d> 8b 74 24 20 41 f6 c6 01 0f 85 9b 03 00 00 e8 e4 60 e4 ff 49 
RIP  [<ffffffff8150dfa8>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff8150dfa8>] compound_head include/linux/page-flags.h:415 [inline]
RIP  [<ffffffff8150dfa8>] page_count include/linux/mm.h:470 [inline]
RIP  [<ffffffff8150dfa8>] __split_huge_page_pmd+0x2c8/0x810 mm/huge_memory.c:3029
 RSP <ffff8801d1bdfac8>
CR2: ffffeafff9298020
---[ end trace 89fd4cd74dab304c ]---