xnu-1228.5.18.tar.gz

[apple/xnu.git] / bsd / hfs / hfscommon / Misc / FileExtentMapping.c

diff --git a/bsd/hfs/hfscommon/Misc/FileExtentMapping.c b/bsd/hfs/hfscommon/Misc/FileExtentMapping.c
index bdfe2f2ded44c2fdd38368445e43d25b41b67a54..a732366ca8be9a1bf8dd3efe5c82ee2a3ad84d5d 100644 (file)
--- a/bsd/hfs/hfscommon/Misc/FileExtentMapping.c
+++ b/bsd/hfs/hfscommon/Misc/FileExtentMapping.c
@@ -517,7 +517,7 @@ OSErr MapFileBlockC (
        //      offset in sectors from start of allocation block space
        //
        temp = (daddr64_t)((offset - (off_t)((off_t)(firstFABN) * (off_t)(allocBlockSize)))/sectorSize);
-       temp += startBlock * sectorsPerBlock;
+       temp += (daddr64_t)startBlock * (daddr64_t)sectorsPerBlock;
 
        /* Add in any volume offsets */
        if (vcb->vcbSigWord == kHFSPlusSigWord)