Changeset 66421 in vbox for trunk/src/VBox/ValidationKit/bootsectors/bs3kit

Timestamp:

Apr 4, 2017 6:17:55 PM (8 years ago)

Author:

vboxsync

Message:

bs3kit: fixed overflow problem in bs3-rm-InitMemory.c causing the 16-bit code segment to be trashed when it was full up to the last page.

File:

• trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-rm-InitMemory.c (modified) (1 diff)

trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-rm-InitMemory.c

@@ -282 +282 @@
 
     /* Mark any unused pages between BS3TEXT16 and BS3SYSTEM16 as free. */
-    cPages = (Bs3Text16_Size + _4K - 1U) >> 12;
+    cPages = (Bs3Text16_Size + (uint32_t)_4K - 1U) >> 12;
     ASMBitClearRange(g_Bs3Mem4KLow.Core.bmAllocated, 0x10U + cPages, 0x20U);