1 files changed, 15 insertions, 0 deletions
diff --git a/src/odb.c b/src/odb.c
index 63b68284a..e35e4caca 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -363,12 +363,27 @@ int git_odb_new(git_odb **out)
 	return 0;
 }
 
+static bool backend_has_valid_version(git_odb_backend *backend)
+{
+	if (!backend)
+		return true;
+
+	if (backend->version > 0 && backend->version <= GIT_ODB_BACKEND_VERSION)
+		return true;
+
+	giterr_set(GITERR_INVALID, "Invalid version %d on git_odb_backend", backend->version);
+	return false;
+}
+
 static int add_backend_internal(git_odb *odb, git_odb_backend *backend, int priority, int is_alternate)
 {
 	backend_internal *internal;
 
 	assert(odb && backend);
 
+	if (!backend_has_valid_version(backend))
+		return -1;
+
 	/* Check if the backend is already owned by another ODB */
 	assert(!backend->odb || backend->odb == odb);