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packed_object_info_detail(): check for corrupt packfile.

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Serge E. Hallyn noticed that we compute how many input bytes are
still left, but did not use it for sanity checking.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-04-17 17:46:07 -07:00
parent bb996614de
commit 2855d58079
1 changed files with 4 additions and 2 deletions
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6
sha1_file.c
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@ -874,17 +874,19 @@ void packed_object_info_detail(struct pack_entry *e,
unsigned char *base_sha1) unsigned char *base_sha1)
{ {
struct packed_git *p = e->p; struct packed_git *p = e->p;
unsigned long offset, left; unsigned long offset;
unsigned char *pack; unsigned char *pack;
enum object_type kind; enum object_type kind;
offset = unpack_object_header(p, e->offset, &kind, size); offset = unpack_object_header(p, e->offset, &kind, size);
pack = p->pack_base + offset; pack = p->pack_base + offset;
left = p->pack_size - offset;
if (kind != OBJ_DELTA) if (kind != OBJ_DELTA)
*delta_chain_length = 0; *delta_chain_length = 0;
else { else {
unsigned int chain_length = 0; unsigned int chain_length = 0;
if (p->pack_size <= offset + 20)
die("pack file %s records an incomplete delta base",
p->pack_name);
memcpy(base_sha1, pack, 20); memcpy(base_sha1, pack, 20);
do { do {
struct pack_entry base_ent; struct pack_entry base_ent;