[rtems commit] dosfs: Unintentional integer overflow

[Gedare Bloom]

Module:    rtems
Branch:    master
Commit:    551468c2db505562ea06e0f8e576df86e178a68f
Changeset: http://git.rtems.org/rtems/commit/?id=551468c2db505562ea06e0f8e576df86e178a68f

Author:    Gedare Bloom <gedare at rtems.org>
Date:      Thu Sep  5 12:58:34 2013 -0400

dosfs: Unintentional integer overflow

Explicitly promote 32-bit integer to 64-bits for multiplication.

---

 cpukit/libfs/src/dosfs/msdos_format.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/cpukit/libfs/src/dosfs/msdos_format.c b/cpukit/libfs/src/dosfs/msdos_format.c
index a939df5..154282f 100644
--- a/cpukit/libfs/src/dosfs/msdos_format.c
+++ b/cpukit/libfs/src/dosfs/msdos_format.c
@@ -515,7 +515,7 @@ static int msdos_format_determine_fmt_params
     ret_val = rtems_disk_fd_get_block_count(fd, &fmt_params->totl_sector_cnt);
   }
   if (ret_val == 0) {
-    total_size = fmt_params->bytes_per_sector * fmt_params->totl_sector_cnt;
+    total_size = (uint64_t)fmt_params->bytes_per_sector * fmt_params->totl_sector_cnt;
     msdos_format_printf (rqdata, MSDOS_FMT_INFO_LEVEL_DETAIL,
                          "bytes per sector: %" PRIu32 "\ntotal sectors: %" PRIu32 "\ntotal size: %" PRIu64 "\n",
                          fmt_params->bytes_per_sector, fmt_params->totl_sector_cnt, total_size);