mm/migrate: fix indexing bug (off by one) and avoid out of bound access

[sfrench/cifs-2.6.git] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index 6954c1435833133f910a08a9cd8e0e1516084296..e00814ca390ea46dab6174e3c7c183e7bd4faf73 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2146,8 +2146,9 @@ static int migrate_vma_collect_hole(unsigned long start,
        unsigned long addr;
 
        for (addr = start & PAGE_MASK; addr < end; addr += PAGE_SIZE) {
-               migrate->src[migrate->npages++] = MIGRATE_PFN_MIGRATE;
+               migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE;
                migrate->dst[migrate->npages] = 0;
+               migrate->npages++;
                migrate->cpages++;
        }