BUG: unable to handle kernel paging request at ffffeafff9ae0020
IP: [<ffffffff8154dfa1>] __read_once_size include/linux/compiler.h:243 [inline]
IP: [<ffffffff8154dfa1>] compound_head include/linux/page-flags.h:143 [inline]
IP: [<ffffffff8154dfa1>] PageMlocked include/linux/page-flags.h:327 [inline]
IP: [<ffffffff8154dfa1>] __split_huge_pmd+0x391/0x1870 mm/huge_memory.c:1773
PGD 0 [  131.040311] 
Oops: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7629 Comm: syz-executor0 Not tainted 4.9.122-g54068d6 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019b88c800 task.stack: ffff8801ba4a8000
RIP: 0010:[<ffffffff8154dfa1>]  [<ffffffff8154dfa1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8154dfa1>]  [<ffffffff8154dfa1>] compound_head include/linux/page-flags.h:143 [inline]
RIP: 0010:[<ffffffff8154dfa1>]  [<ffffffff8154dfa1>] PageMlocked include/linux/page-flags.h:327 [inline]
RIP: 0010:[<ffffffff8154dfa1>]  [<ffffffff8154dfa1>] __split_huge_pmd+0x391/0x1870 mm/huge_memory.c:1773
RSP: 0018:ffff8801ba4af788  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffeafff9ae0000 RCX: ffffc9000089a000
RDX: 1ffffd5fff35c004 RSI: ffffffff8154df6e RDI: ffffeafff9ae0020
RBP: ffff8801ba4af8b8 R08: ffff88019b88d110 R09: 0000000000000001
R10: ffff88019b88c800 R11: 1ffff10033711a1d R12: ffffea0000000000
R13: 0000000000000000 R14: ffff8801bb6d29f0 R15: ffff8801bb50d800
FS:  00007feb885b2700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffeafff9ae0020 CR3: 00000001b5c96000 CR4: 00000000001606f0
Stack:
 ffffffff8153e677 ffffffff8153ec42 ffffffff8153a57e ffffffff814e075c
 ffffffff814e454a ffffffff855d4130 ffffffff815b67dc 0000000000003e20
 ffff88019b88d108 ffff88019b88d0b8 ffff88019b88d110 1ffff10037495f06
Call Trace:
 [<ffffffff8154f629>] split_huge_pmd_address+0x1a9/0x1f0 mm/huge_memory.c:1800
 [<ffffffff8154f83a>] vma_adjust_trans_huge+0x1ca/0x250 mm/huge_memory.c:1816
 [<ffffffff814df138>] __vma_adjust+0x168/0x16c0 mm/mmap.c:777
 [<ffffffff814e0a50>] vma_adjust include/linux/mm.h:1965 [inline]
 [<ffffffff814e0a50>] __split_vma.isra.40+0x3c0/0x670 mm/mmap.c:2621
 [<ffffffff814e454a>] split_vma+0x8a/0xc0 mm/mmap.c:2653
 [<ffffffff8166f2ec>] userfaultfd_register fs/userfaultfd.c:883 [inline]
 [<ffffffff8166f2ec>] userfaultfd_ioctl+0x1f5c/0x2540 fs/userfaultfd.c:1232
 [<ffffffff815b67dc>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815b67dc>] file_ioctl fs/ioctl.c:493 [inline]
 [<ffffffff815b67dc>] do_vfs_ioctl+0x1ac/0x11a0 fs/ioctl.c:677
 [<ffffffff815b785f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815b785f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a00cd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: ff df 4c 21 e3 49 bc 00 00 00 00 00 ea ff ff 48 c1 eb 06 4c 01 e3 48 8d 7b 20 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 14 13 00 00 <4c> 8b 6b 20 49 89 dc 41 f6 c5 01 0f 85 ab 0a 00 00 e8 b9 2d e1 
RIP  [<ffffffff8154dfa1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8154dfa1>] compound_head include/linux/page-flags.h:143 [inline]
RIP  [<ffffffff8154dfa1>] PageMlocked include/linux/page-flags.h:327 [inline]
RIP  [<ffffffff8154dfa1>] __split_huge_pmd+0x391/0x1870 mm/huge_memory.c:1773
 RSP <ffff8801ba4af788>
CR2: ffffeafff9ae0020
---[ end trace 4e793e0683a348dc ]---