BUG: unable to handle kernel paging request at ffffeafff9770020
IP: [<ffffffff8150e8f8>] __read_once_size include/linux/compiler.h:218 [inline]
IP: [<ffffffff8150e8f8>] compound_head include/linux/page-flags.h:415 [inline]
IP: [<ffffffff8150e8f8>] page_count include/linux/mm.h:470 [inline]
IP: [<ffffffff8150e8f8>] __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: 918 Comm: syz-executor7 Not tainted 4.4.150-g5541782 #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801ca189800 task.stack: ffff8800a3478000
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
RIP: 0010:[<ffffffff8150e8f8>]  [<ffffffff8150e8f8>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff8150e8f8>]  [<ffffffff8150e8f8>] compound_head include/linux/page-flags.h:415 [inline]
RIP: 0010:[<ffffffff8150e8f8>]  [<ffffffff8150e8f8>] page_count include/linux/mm.h:470 [inline]
RIP: 0010:[<ffffffff8150e8f8>]  [<ffffffff8150e8f8>] __split_huge_page_pmd+0x2c8/0x820 mm/huge_memory.c:3029
RSP: 0018:ffff8800a347f8f0  EFLAGS: 00010246
RAX: 1ffffd5fff2ee004 RBX: ffffeafff9770020 RCX: ffffc90003036000
RDX: 0000000000000158 RSI: ffffffff8150e8c0 RDI: 00003ffe5dc001e0
RBP: ffff8800a347f9f8 R08: ffffffff8533b500 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8801ca189800 R12: ffffeafff9770000
R13: dffffc0000000000 R14: ffff8801ca989800 R15: ffff8801ca989800
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f5708b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffeafff9770020 CR3: 00000001ca0e9000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff814ac4b5 ffffffff814afbe8 ffff8801ca18a120 fffffbfff0882602
 ffff8801ca18a0d0 ffff8801ca18a0d8[  433.382531] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
 ffff8801ca18a128 ffff8801d32f44d0
 1ffff1001468ff2e ffff88024a989000 0000000000000000 0000000020200000
Call Trace:
 [<ffffffff815104aa>] split_huge_page_pmd_mm+0x7a/0x90 mm/huge_memory.c:3058
 [<ffffffff81510691>] split_huge_page_address+0x1d1/0x220 mm/huge_memory.c:3085
 [<ffffffff815108fb>] vma_adjust_trans_huge+0x21b/0x2c0 mm/huge_memory.c:3111
 [<ffffffff814ab4b0>] vma_adjust+0xd50/0x13d0 mm/mmap.c:833
 [<ffffffff814ac0ff>] __split_vma.isra.40+0x5cf/0x750 mm/mmap.c:2584
 [<ffffffff814ac4b5>] do_munmap+0x235/0xe50 mm/mmap.c:2663
 [<ffffffff814afbe8>] mmap_region+0x1d8/0x12e0 mm/mmap.c:1637
 [<ffffffff814b121d>] do_mmap+0x52d/0xa60 mm/mmap.c:1473
 [<ffffffff8146ffd5>] do_mmap_pgoff include/linux/mm.h:1919 [inline]
 [<ffffffff8146ffd5>] vm_mmap_pgoff+0x165/0x1b0 mm/util.c:296
 [<ffffffff814af342>] SYSC_mmap_pgoff mm/mmap.c:1523 [inline]
 [<ffffffff814af342>] SyS_mmap_pgoff+0x342/0x550 mm/mmap.c:1481
 [<ffffffff81006d94>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838cca03>] 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  [<ffffffff8150e8f8>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff8150e8f8>] compound_head include/linux/page-flags.h:415 [inline]
RIP  [<ffffffff8150e8f8>] page_count include/linux/mm.h:470 [inline]
RIP  [<ffffffff8150e8f8>] __split_huge_page_pmd+0x2c8/0x820 mm/huge_memory.c:3029
 RSP <ffff8800a347f8f0>
CR2: ffffeafff9770020
---[ end trace f789662307a17e24 ]---