[Patch size_t V3 04/19] delta: Fix offset overflows

From

Martin Koegler <martin.koegler@chello.at>

Date

Aug 16, 2017, 20:16 UTC

Message-ID

<1502914591-26215-5-git-send-email-martin@mail.zuhause>

In-Reply-To

<1502914591-26215-1-git-send-email-martin@mail.zuhause>

From: Martin Koegler <martin.koegler@chello.at>

Prevent generating delta offsets beyond 4G.

Signed-off-by: Martin Koegler <martin.koegler@chello.at>
---
 diff-delta.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/diff-delta.c b/diff-delta.c
index dffbab1..4489b79 100644
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -453,6 +453,9 @@ create_delta(const struct delta_index *index,
 			moff += msize;
 			msize = left;
 
+			if (moff > 0xffffffff)
+				msize = 0;
+
 			if (msize < 4096) {
 				int j;
 				val = 0;

-- 
2.1.4