From: John Hodge <tpg@mutabah.net>
Date: Sun, 22 Sep 2013 15:48:30 +0000 (+0800)
Subject: Kernel - Added sanity check to template PMM
X-Git-Tag: rel0.15~177
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=0e47df07d3e44c7e18405387433a0d81a8c0c868;p=tpg%2Facess2.git

Kernel - Added sanity check to template PMM
---

diff --git a/KernelLand/Kernel/include/tpl_mm_phys_bitmap.h b/KernelLand/Kernel/include/tpl_mm_phys_bitmap.h
index 005a2f8c..106efd75 100644
--- a/KernelLand/Kernel/include/tpl_mm_phys_bitmap.h
+++ b/KernelLand/Kernel/include/tpl_mm_phys_bitmap.h
@@ -354,7 +354,13 @@ int MM_GetRefCount(tPAddr PAddr)
 		return gaiPageReferences[PAddr];
 	}
 	
-	if( gaPageBitmaps[ PAddr / 32 ] & (1LL << (PAddr&31)) ) {
+	Uint32	*bm = &gaPageBitmaps[ PAddr / 32 ];
+	if( !MM_GetPhysAddr(bm) ) {
+		Log_Error("MMPhys", "MM_GetRefCount: bitmap for ppage 0x%x not mapped %p",
+			PAddr, bm);
+		return 0;
+	}
+	if( (*bm) & (1LL << (PAddr&31)) ) {
 		return 1;
 	}