BUG: unable to handle kernel paging request at ffffeafffd880020
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: 1 PID: 11967 Comm: syz-executor4 Not tainted 4.4.149-gf76bdbd #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d3d78000 task.stack: ffff8800a1798000
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:ffff8800a179f8f0  EFLAGS: 00010246
RAX: 1ffffd5fffb10004 RBX: ffffeafffd880020 RCX: ffffc9000184e000
RDX: 0000000000000161 RSI: ffffffff8150df70 RDI: 00003fff620001e0
RBP: ffff8800a179f9f8 R08: ffffffff8533b500 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8801d3d78000 R12: ffffeafffd880000
R13: dffffc0000000000 R14: ffff8800b6ab7800 R15: ffff8800b6ab7800
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f5709b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffeafffd880020 CR3: 00000000bb8c2000 CR4: 00000000001606f0
Stack:
 ffffffff814ac8c8 ffffffff814af668 ffff8801d3d78920 fffffbfff0882602
 ffff8801d3d788d0 ffff8801d3d788d8 ffff8801d3d78928 ffff8801da1f7c60
 1ffff100142f3f2e ffff880136ab7000 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
 [<ffffffff8150ff26>] vma_adjust_trans_huge+0x1e6/0x2c0 mm/huge_memory.c:3101
 [<ffffffff814aaf30>] vma_adjust+0xd50/0x13d0 mm/mmap.c:833
 [<ffffffff814aba12>] __split_vma.isra.40+0x462/0x750 mm/mmap.c:2581
 [<ffffffff814ac8c8>] do_munmap+0xbc8/0xe50 mm/mmap.c:2672
 [<ffffffff814af668>] mmap_region+0x1d8/0x12e0 mm/mmap.c:1637
 [<ffffffff814b0c9d>] do_mmap+0x52d/0xa60 mm/mmap.c:1473
 [<ffffffff8146fb95>] do_mmap_pgoff include/linux/mm.h:1919 [inline]
 [<ffffffff8146fb95>] vm_mmap_pgoff+0x165/0x1b0 mm/util.c:296
 [<ffffffff814aedc2>] SYSC_mmap_pgoff mm/mmap.c:1523 [inline]
 [<ffffffff814aedc2>] SyS_mmap_pgoff+0x342/0x550 mm/mmap.c:1481
 [<ffffffff81006d94>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838cbfc3>] sysenter_flags_fixed+0xd/0x1a
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 <ffff8800a179f8f0>
CR2: ffffeafffd880020
---[ end trace 241944cdf63f5569 ]---