Merge branch 'mk/diff-delta-avoid-large-offset'
The delta format used in the packfile cannot reference data at
offset larger than what can be expressed in 4-byte, but the
generator for the data failed to make sure the offset does not
overflow. This has been corrected.
* mk/diff-delta-avoid-large-offset:
diff-delta: do not allow delta offset truncation
diff --git a/diff-delta.c b/diff-delta.c
index cd238c8..e496433 100644
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -454,6 +454,9 @@ create_delta(const struct delta_index *index,
moff += msize;
msize = left;
+ if (moff > 0xffffffff)
+ msize = 0;
+
if (msize < 4096) {
int j;
val = 0;
