From fed1ef9550d528dffa8891e8b2f49b486c7985bc Mon Sep 17 00:00:00 2001
From: Martin Koegler <martin.koegler@chello.at>
Date: Thu, 10 Aug 2017 20:13:09 +0200
Subject: [PATCH] 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-delta.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/diff-delta.c b/diff-delta.c
index 3797ce6041..ea710c44ce 100644
--- 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;
--
2.48.1