From: Aneesh Kumar K.V Date: Tue, 1 Dec 2015 03:37:00 +0000 (+0530) Subject: powerpc/mm: Don't open code pgtable_t size X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4dcbd88eb600d52ce52a75c5075c2eff2f6849e6;p=linux-beck.git powerpc/mm: Don't open code pgtable_t size The slot information of base page size hash pte is stored in the pgtable_t w.r.t transparent hugepage. We need to make sure we don't index beyond pgtable_t size. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/mm/hugepage-hash64.c b/arch/powerpc/mm/hugepage-hash64.c index 1f666de0110a..baf1301ded0c 100644 --- a/arch/powerpc/mm/hugepage-hash64.c +++ b/arch/powerpc/mm/hugepage-hash64.c @@ -71,7 +71,7 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid, */ shift = mmu_psize_defs[psize].shift; index = (ea & ~HPAGE_PMD_MASK) >> shift; - BUG_ON(index >= 4096); + BUG_ON(index >= PTE_FRAG_SIZE); vpn = hpt_vpn(ea, vsid, ssize); hpte_slot_array = get_hpte_slot_array(pmdp);