BUG: unable to handle kernel paging request at ffffeafff9308020 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 [ 63.113351] Oops: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 6090 Comm: syz-executor0 Not tainted 4.9.122-g54068d6 #30 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801a4954800 task.stack: ffff8801a48e0000 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:ffff8801a48e7938 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffeafff9308000 RCX: ffffc900008ae000 RDX: 1ffffd5fff261004 RSI: ffffffff8154df6e RDI: ffffeafff9308020 RBP: ffff8801a48e7a68 R08: ffff8801a4955110 R09: 0000000000000001 R10: ffff8801a4954800 R11: 1ffff1003492aa1d R12: ffffea0000000000 R13: 0000000000000000 R14: ffff8801c7e71708 R15: ffff8801b75cf810 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f5764b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffeafff9308020 CR3: 00000001d7d21000 CR4: 00000000001606f0 Stack: ffffffff8153e677 ffffffff8153ec42 ffffffff8153a57e ffffffff814e075c ffffffff814e454a ffffffff855d2ea0 ffffffff814ecb7e 0000000000000647 ffff8801a4955108 ffff8801a49550b8 ffff8801a4955110 1ffff1003491cf3c 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 [] mprotect_fixup+0x6ca/0x930 mm/mprotect.c:365 [] do_mprotect_pkey+0x48e/0x890 mm/mprotect.c:509 [] SYSC_mprotect mm/mprotect.c:534 [inline] [] SyS_mprotect+0x2a/0x40 mm/mprotect.c:531 [] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline] [] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 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: ffffeafff9308020 ---[ end trace c6a8ea412127222e ]---