BUG: unable to handle kernel paging request at ffffeafff9258020 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: 0 PID: 8065 Comm: syz-executor4 Not tainted 4.4.150-g5541782 #83 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8800b7a7e000 task.stack: ffff8800a2870000 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:ffff8800a2877958 EFLAGS: 00010246 RAX: 1ffffd5fff24b004 RBX: ffffeafff9258020 RCX: ffffc90003e3d000 RDX: 00000000000000fd RSI: ffffffff8150e8c0 RDI: 00003ffe496001e0 RBP: ffff8800a2877a60 R08: ffffffff8533b500 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8800b7a7e000 R12: ffffeafff9258000 R13: dffffc0000000000 R14: ffff8801d97bb800 R15: ffff8801d97bb800 FS: 00007ffb4ba4c700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffeafff9258020 CR3: 00000001d7862000 CR4: 00000000001606f0 Stack: ffffffff814ace48 ffff8800b7a7e920 ffffffff853d1f10 fffffbfff0882602 ffff8800b7a7e8d8 ffff8800b7a7e928 ffff8800b7a7e8e0 ffff8801d3682cb8 1ffff1001450ef3b ffff8802597bb000 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 [] do_munmap+0xbc8/0xe50 mm/mmap.c:2672 [] mmap_region+0x1d8/0x12e0 mm/mmap.c:1637 [] do_mmap+0x52d/0xa60 mm/mmap.c:1473 [] do_mmap_pgoff include/linux/mm.h:1919 [inline] [] vm_mmap_pgoff+0x165/0x1b0 mm/util.c:296 [] SYSC_mmap_pgoff mm/mmap.c:1523 [inline] [] SyS_mmap_pgoff+0xd0/0x550 mm/mmap.c:1481 [] SYSC_mmap arch/x86/kernel/sys_x86_64.c:95 [inline] [] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:86 [] entry_SYSCALL_64_fastpath+0x22/0x9e 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: ffffeafff9258020 ---[ end trace b451bb99b24468cc ]---