mem: fix build with gcc 5.1

On Fedora 22, with GCC 5.1, errors are reported due to array accesses
being potentially out of bounds. This commit fixes this by ensuring the
bounds check in the loop takes account of the array size.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5f9f92e..9b8d946 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1188,7 +1188,9 @@ rte_eal_hugepage_init(void)
                int socket = tmp_hp[i].socket_id;
 
                /* find a hugepage info with right size and increment num_pages */
-               for (j = 0; j < (int) internal_config.num_hugepage_sizes; j++) {
+               const int nb_hpsizes = RTE_MIN(MAX_HUGEPAGE_SIZES,
+                               (int)internal_config.num_hugepage_sizes);
+               for (j = 0; j < nb_hpsizes; j++) {
                        if (tmp_hp[i].size ==
                                        internal_config.hugepage_info[j].hugepage_sz) {
 #ifdef RTE_EAL_SINGLE_FILE_SEGMENTS