Changeset a2789d2 in mainline

Timestamp:

2012-01-13T20:42:20Z (12 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1a313f7

Parents:

db64d094

Message:

Avoid overflow in comparison when base + size == 0.

File:

• kernel/genarch/src/mm/page_pt.c (modified) (1 diff)

kernel/genarch/src/mm/page_pt.c

@@ -322 +322 @@
 
         ASSERT(ispwr2(ptl0step));
-
-        for (addr = ALIGN_DOWN(base, ptl0step); addr < base + size;
+        ASSERT(size > 0);
+
+        for (addr = ALIGN_DOWN(base, ptl0step); addr - 1 < base + size - 1;
             addr += ptl0step) {
                 uintptr_t l1;