Changeset 326bf65 in mainline

Timestamp:

2011-05-19T23:13:50Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

712c4ba, 98e4507

Parents:

2f23341

Message:

Fix an unsigned overflow which prevented proper handling of page faults
in address space areas ending on the last page of the entire virtual
address range.

File:

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

kernel/generic/src/mm/as.c

@@ -482 +482 @@
         
         /*
-         * Search the leaf node and the righmost record of its left neighbour
+         * Search the leaf node and the rightmost record of its left neighbour
          * to find out whether this is a miss or va belongs to an address
          * space area found there.
@@ -494 +494 @@
                 
                 mutex_lock(&area->lock);
-                
-                if ((area->base <= va) &&
-                    (va < area->base + (area->pages << PAGE_WIDTH)))
+
+                size_t size = area->pages << PAGE_WIDTH;
+                if ((area->base <= va) && (va <= area->base + (size - 1)))
                         return area;