BUG: unable to handle kernel paging request at ffffeafff9318020 IP: [] __read_once_size include/linux/compiler.h:218 [inline] IP: [] compound_head include/linux/page-flags.h:415 [inline] IP: [] page_count include/linux/mm.h:470 [inline] IP: [] __split_huge_page_pmd+0x2c8/0x820 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: 8507 Comm: syz-executor1 Not tainted 4.4.150-g5541782 #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8800b97a6000 task.stack: ffff8801d8648000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] compound_head include/linux/page-flags.h:415 [inline] RIP: 0010:[] [] page_count include/linux/mm.h:470 [inline] RIP: 0010:[] [] __split_huge_page_pmd+0x2c8/0x820 mm/huge_memory.c:3029 RSP: 0018:ffff8801d864f980 EFLAGS: 00010246 RAX: 1ffffd5fff263004 RBX: ffffeafff9318020 RCX: ffffc90001434000 RDX: 0000000000000156 RSI: ffffffff8150e8c0 RDI: 00003ffe4c6001e0 RBP: ffff8801d864fa88 R08: ffffffff8533b500 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8800b97a6000 R12: ffffeafff9318000 R13: dffffc0000000000 R14: ffff8800b64ab800 R15: ffff8800b64ab800 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f57edb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffeafff9318020 CR3: 00000000b2b29000 CR4: 00000000001606f0 Stack: ffffffff814b30fb ffffffff814b6f67 ffff8800b97a6920 fffffbfff0882602 ffff8800b97a68d0 ffff8800b97a68d8 ffff8800b97a6928 ffff8800b9829528 1ffff1003b0c9f40 ffff8801364ab000 0000000000000000 0000000020200000 Call Trace: [] split_huge_page_pmd_mm+0x7a/0x90 mm/huge_memory.c:3058 [] split_huge_page_address+0x1d1/0x220 mm/huge_memory.c:3085 [] vma_adjust_trans_huge+0x1e6/0x2c0 mm/huge_memory.c:3101 [] vma_adjust+0xd50/0x13d0 mm/mmap.c:833 [] __split_vma.isra.40+0x462/0x750 mm/mmap.c:2581 [] split_vma+0x5b/0x80 mm/mmap.c:2613 [] mprotect_fixup+0x6a7/0x8d0 mm/mprotect.c:355 [] SYSC_mprotect mm/mprotect.c:476 [inline] [] SyS_mprotect+0x2f3/0x640 mm/mprotect.c:397 [] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline] [] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460 [] 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 fd 04 00 00 4c 8b a5 68 ff ff ff <4d> 8b 74 24 20 41 f6 c6 01 0f 85 b1 03 00 00 e8 d4 5b e4 ff 49 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] compound_head include/linux/page-flags.h:415 [inline] RIP [] page_count include/linux/mm.h:470 [inline] RIP [] __split_huge_page_pmd+0x2c8/0x820 mm/huge_memory.c:3029 RSP CR2: ffffeafff9318020 ---[ end trace 86d761c3ad4e3afe ]---