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-rw-r--r--commit.c33
1 files changed, 28 insertions, 5 deletions
diff --git a/commit.c b/commit.c
index 52036bc90f..434ec030d6 100644
--- a/commit.c
+++ b/commit.c
@@ -402,10 +402,22 @@ int parse_commit_buffer(struct repository *r, struct commit *item, const void *b
struct commit_graft *graft;
const int tree_entry_len = the_hash_algo->hexsz + 5;
const int parent_entry_len = the_hash_algo->hexsz + 7;
+ struct tree *tree;
if (item->object.parsed)
return 0;
- item->object.parsed = 1;
+
+ if (item->parents) {
+ /*
+ * Presumably this is leftover from an earlier failed parse;
+ * clear it out in preparation for us re-parsing (we'll hit the
+ * same error, but that's good, since it lets our caller know
+ * the result cannot be trusted.
+ */
+ free_commit_list(item->parents);
+ item->parents = NULL;
+ }
+
tail += size;
if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) ||
bufptr[tree_entry_len] != '\n')
@@ -413,7 +425,12 @@ int parse_commit_buffer(struct repository *r, struct commit *item, const void *b
if (get_oid_hex(bufptr + 5, &parent) < 0)
return error("bad tree pointer in commit %s",
oid_to_hex(&item->object.oid));
- set_commit_tree(item, lookup_tree(r, &parent));
+ tree = lookup_tree(r, &parent);
+ if (!tree)
+ return error("bad tree pointer %s in commit %s",
+ oid_to_hex(&parent),
+ oid_to_hex(&item->object.oid));
+ set_commit_tree(item, tree);
bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */
pptr = &item->parents;
@@ -433,8 +450,11 @@ int parse_commit_buffer(struct repository *r, struct commit *item, const void *b
if (graft && (graft->nr_parent < 0 || grafts_replace_parents))
continue;
new_parent = lookup_commit(r, &parent);
- if (new_parent)
- pptr = &commit_list_insert(new_parent, pptr)->next;
+ if (!new_parent)
+ return error("bad parent %s in commit %s",
+ oid_to_hex(&parent),
+ oid_to_hex(&item->object.oid));
+ pptr = &commit_list_insert(new_parent, pptr)->next;
}
if (graft) {
int i;
@@ -443,7 +463,9 @@ int parse_commit_buffer(struct repository *r, struct commit *item, const void *b
new_parent = lookup_commit(r,
&graft->parent[i]);
if (!new_parent)
- continue;
+ return error("bad graft parent %s in commit %s",
+ oid_to_hex(&graft->parent[i]),
+ oid_to_hex(&item->object.oid));
pptr = &commit_list_insert(new_parent, pptr)->next;
}
}
@@ -452,6 +474,7 @@ int parse_commit_buffer(struct repository *r, struct commit *item, const void *b
if (check_graph)
load_commit_graph_info(r, item);
+ item->object.parsed = 1;
return 0;
}