BUG: unable to handle kernel paging request at ffffeafff92f8020 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: 13425 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: ffff8801cd0f9800 task.stack: ffff8801cffa0000 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:ffff8801cffa7bc8 EFLAGS: 00010246 RAX: 1ffffd5fff25f004 RBX: ffffeafff92f8020 RCX: ffffc90005283000 RDX: 00000000000000ab RSI: ffffffff8150e8c0 RDI: 00003ffe4be001e0 RBP: ffff8801cffa7cd0 R08: ffffffff8533b500 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8801cd0f9800 R12: ffffeafff92f8000 R13: dffffc0000000000 R14: ffff8800afcbc800 R15: ffff8800afcbc800 FS: 00007f86ead1c700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffeafff92f8020 CR3: 00000000bb840000 CR4: 00000000001606f0 Stack: ffffffff814ac4b5 ffff8801cd0fa120 ffffffff853d1f10 fffffbfff0882602 ffff8801cd0fa0d8 ffff8801cd0fa128 ffff8801cd0fa0e0 ffff8801d2c08058 1ffff10039ff4f89 ffff88012fcbc000 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+0x21b/0x2c0 mm/huge_memory.c:3111 [] vma_adjust+0xd50/0x13d0 mm/mmap.c:833 [] __split_vma.isra.40+0x5cf/0x750 mm/mmap.c:2584 [] do_munmap+0x235/0xe50 mm/mmap.c:2663 [] vm_munmap+0x62/0x80 mm/mmap.c:2713 [] SYSC_munmap mm/mmap.c:2722 [inline] [] SyS_munmap+0x25/0x30 mm/mmap.c:2719 [] 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: ffffeafff92f8020 ---[ end trace a4110e1ae98b8042 ]---