config_mbr: Fix integer overflow
The values need to be converted to loff_t *before* performing
the multiplication, else any sector offset past MAX_INT
bytes will overflow.
Change-Id: Ib8992f28aa4119ac7b4ad354b2448c4b0cfaf846
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
diff --git a/libdiskconfig/config_mbr.c b/libdiskconfig/config_mbr.c
index 703484c..b89d382 100644
--- a/libdiskconfig/config_mbr.c
+++ b/libdiskconfig/config_mbr.c
@@ -152,7 +152,7 @@
/* we are going to write the ebr at the current LBA, and then bump the
* lba counter since that is where the logical data partition will start */
- item->offset = (*lba) * dinfo->sect_size;
+ item->offset = ((loff_t)(*lba)) * dinfo->sect_size;
(*lba)++;
ebr = (struct pc_boot_record *) &item->data;