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multi-pack-index: verify bad header

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When verifying if a multi-pack-index file is valid, we want the
command to fail to signal an invalid file. Previously, we wrote
an error to stderr and continued as if we had no multi-pack-index.
Now, die() instead of error().

Add tests that check corrupted headers in a few ways:

* Bad signature
* Bad file version
* Bad hash version
* Truncated hash count
* Extended hash count

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2018-09-13 11:02:15 -07:00
committed by Junio C Hamano
parent 56ee7ff156
commit 53ad040744
2 changed files with 51 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
midx.c
View File

@ -76,24 +76,18 @@ struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local
m->local = local;
m->signature = get_be32(m->data);
if (m->signature != MIDX_SIGNATURE) {
error(_("multi-pack-index signature 0x%08x does not match signature 0x%08x"),
if (m->signature != MIDX_SIGNATURE)
die(_("multi-pack-index signature 0x%08x does not match signature 0x%08x"),
m->signature, MIDX_SIGNATURE);
goto cleanup_fail;
}
m->version = m->data[MIDX_BYTE_FILE_VERSION];
if (m->version != MIDX_VERSION) {
error(_("multi-pack-index version %d not recognized"),
if (m->version != MIDX_VERSION)
die(_("multi-pack-index version %d not recognized"),
m->version);
goto cleanup_fail;
}
hash_version = m->data[MIDX_BYTE_HASH_VERSION];
if (hash_version != MIDX_HASH_VERSION) {
error(_("hash version %u does not match"), hash_version);
goto cleanup_fail;
}
if (hash_version != MIDX_HASH_VERSION)
die(_("hash version %u does not match"), hash_version);
m->hash_len = MIDX_HASH_LEN;
m->num_chunks = m->data[MIDX_BYTE_NUM_CHUNKS];