Changeset dbbeb26 in mainline

Timestamp:

2006-04-24T19:52:58Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

df0103f7

Parents:

fd8af4b

Message:

Do not allow zero size address space areas.

File:

• generic/src/mm/as.c (modified) (2 diffs)

generic/src/mm/as.c

@@ -138 +138 @@
                 return NULL;
 
+        if (!size)
+                return NULL;
+
         /* Writeable executable areas are not supported. */
         if ((flags & AS_AREA_EXEC) && (flags & AS_AREA_WRITE))
@@ -462 +465 @@
 
         pages = SIZE2FRAMES((address - area->base) + size);
+        if (!pages) {
+                /*
+                 * Zero size address space areas are not allowed.
+                 */
+                spinlock_unlock(&area->lock);
+                spinlock_unlock(&as->lock);
+                interrupts_restore(ipl);
+                return (__address) -1;
+        }
+        
         if (pages < area->pages) {
                 int i;