BUG: unable to handle kernel paging request at ffffeafff9ae0020 IP: [] __read_once_size include/linux/compiler.h:243 [inline] IP: [] compound_head include/linux/page-flags.h:143 [inline] IP: [] PageMlocked include/linux/page-flags.h:327 [inline] IP: [] __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:[] [] __read_once_size include/linux/compiler.h:243 [inline] RIP: 0010:[] [] compound_head include/linux/page-flags.h:143 [inline] RIP: 0010:[] [] PageMlocked include/linux/page-flags.h:327 [inline] RIP: 0010:[] [] __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: [] split_huge_pmd_address+0x1a9/0x1f0 mm/huge_memory.c:1800 [] vma_adjust_trans_huge+0x1ca/0x250 mm/huge_memory.c:1816 [] __vma_adjust+0x168/0x16c0 mm/mmap.c:777 [] vma_adjust include/linux/mm.h:1965 [inline] [] __split_vma.isra.40+0x3c0/0x670 mm/mmap.c:2621 [] split_vma+0x8a/0xc0 mm/mmap.c:2653 [] userfaultfd_register fs/userfaultfd.c:883 [inline] [] userfaultfd_ioctl+0x1f5c/0x2540 fs/userfaultfd.c:1232 [] vfs_ioctl fs/ioctl.c:43 [inline] [] file_ioctl fs/ioctl.c:493 [inline] [] do_vfs_ioctl+0x1ac/0x11a0 fs/ioctl.c:677 [] SYSC_ioctl fs/ioctl.c:694 [inline] [] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] 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 [] __read_once_size include/linux/compiler.h:243 [inline] RIP [] compound_head include/linux/page-flags.h:143 [inline] RIP [] PageMlocked include/linux/page-flags.h:327 [inline] RIP [] __split_huge_pmd+0x391/0x1870 mm/huge_memory.c:1773 RSP CR2: ffffeafff9ae0020 ---[ end trace 4e793e0683a348dc ]---