powerpc: Check for valid hugepage size in hugetlb_get_unmapped_area

[linux-2.6-omap-h63xx.git] / arch / powerpc / mm / hugetlbpage.c

diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 7bbf4e4ed4306b3a395906b6307808df326fb7cf..f0c3b88d50fa5a5f98847bd1914be1881885af9d 100644 (file)
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -507,6 +507,9 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 {
        struct hstate *hstate = hstate_file(file);
        int mmu_psize = shift_to_mmu_psize(huge_page_shift(hstate));
+
+       if (!mmu_huge_psizes[mmu_psize])
+               return -EINVAL;
        return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1, 0);
 }