[PATCH V2 1/2] Fix delta integer overflows
From: Martin Koegler <martin.koegler@chello.at>
The current delta code produces incorrect pack objects for files > 4GB.
Signed-off-by: Martin Koegler <martin.koegler@chello.at>
---
For next.
diff-delta.c | 24 +++++++++++++-----------
1 file changed, 13 insertions(+), 11 deletions(-)
diff --git a/diff-delta.c b/diff-delta.c
index 3797ce6..cd238c8 100644
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -319,7 +319,9 @@ create_delta(const struct delta_index *index,
const void *trg_buf, unsigned long trg_size,
unsigned long *delta_size, unsigned long max_size)
{
- unsigned int i, outpos, outsize, moff, msize, val;
+ unsigned int i, val;
+ off_t outpos, moff;
+ size_t l, outsize, msize;
int inscnt;
const unsigned char *ref_data, *ref_top, *data, *top;
unsigned char *out;
@@ -336,20 +338,20 @@ create_delta(const struct delta_index *index,
return NULL;
/* store reference buffer size */
- i = index->src_size;
- while (i >= 0x80) {
- out[outpos++] = i | 0x80;
- i >>= 7;
+ l = index->src_size;
+ while (l >= 0x80) {
+ out[outpos++] = l | 0x80;
+ l >>= 7;
}
- out[outpos++] = i;
+ out[outpos++] = l;
/* store target buffer size */
- i = trg_size;
- while (i >= 0x80) {
- out[outpos++] = i | 0x80;
- i >>= 7;
+ l = trg_size;
+ while (l >= 0x80) {
+ out[outpos++] = l | 0x80;
+ l >>= 7;
}
- out[outpos++] = i;
+ out[outpos++] = l;
ref_data = index->src_buf;
ref_top = ref_data + index->src_size;
--
2.1.4
Martin Koegler <martin.koegler@chello.at>