diff-delta: do not allow delta offset truncation

Prevent generating delta offsets beyond 4G, as the xdelta used in
the pack format cannot represent such large offset.

Signed-off-by: Martin Koegler <martin.koegler@chello.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff-delta.c b/diff-delta.c
index 3797ce6041981d1facda44d3a95d4448dbb8a091..ea710c44ce6b215176e05f70573ad52a74d6f51e 100644 (file)
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -452,6 +452,9 @@ create_delta(const struct delta_index *index,
                        moff += msize;
                        msize = left;
 
+                       if (moff > 0xffffffff)
+                               msize = 0;
+
                        if (msize < 4096) {
                                int j;
                                val = 0;