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-rw-r--r--util/cbfstool/cbfs_image.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c
index 314ea5741d..95e6f42b17 100644
--- a/util/cbfstool/cbfs_image.c
+++ b/util/cbfstool/cbfs_image.c
@@ -110,11 +110,18 @@ static int cbfs_fix_legacy_size(struct cbfs_image *image, char *hdr_loc)
// A bug in old cbfstool may produce extra few bytes (by alignment) and
// cause cbfstool to overwrite things after free space -- which is
// usually CBFS header on x86. We need to workaround that.
+ // Except when we run across a file that contains the actual header,
+ // in which case this image is a safe, new-style
+ // `cbfstool add-master-header` based image.
struct cbfs_file *entry, *first = NULL, *last = NULL;
for (first = entry = cbfs_find_first_entry(image);
entry && cbfs_is_valid_entry(image, entry);
entry = cbfs_find_next_entry(image, entry)) {
+ /* Is the header guarded by a CBFS file entry? Then exit */
+ if (((char *)entry) + ntohl(entry->offset) == hdr_loc) {
+ return 0;
+ }
last = entry;
}
if ((char *)first < (char *)hdr_loc &&