Check return value when calling musig_key_agg

Author: bigspider

src/handler/lib/policy.c

@@ -489,7 +489,9 @@ __attribute__((warn_unused_result)) static int get_derived_pubkey(
         qsort(keys, musig_info->n, sizeof(plain_pk_t), compare_plain_pk);
 
         musig_keyagg_context_t musig_ctx;
-        musig_key_agg(keys, musig_info->n, &musig_ctx);
+        if (0 > musig_key_agg(keys, musig_info->n, &musig_ctx)) {
+            return -1;
+        }
 
         // compute the aggregated extended pubkey
         memset(&ext_pubkey, 0, sizeof(ext_pubkey));

src/handler/sign_psbt.c

@@ -659,7 +659,9 @@ static bool fill_keyexpr_info_if_internal(dispatcher_context_t *dc,
             qsort(keys, musig_info->n, sizeof(plain_pk_t), compare_plain_pk);
 
             musig_keyagg_context_t musig_ctx;
-            musig_key_agg(keys, musig_info->n, &musig_ctx);
+            if (0 > musig_key_agg(keys, musig_info->n, &musig_ctx)) {
+                return false;
+            }
 
             // compute the aggregated extended pubkey
             memset(&keyexpr_info->pubkey, 0, sizeof(keyexpr_info->pubkey));

src/musig/musig.c

@@ -385,7 +385,11 @@ static int musig_get_session_values(const musig_session_context_t *session_ctx,
 
     // Perform key aggregation and tweaking
     musig_keyagg_context_t keyagg_ctx;
-    musig_key_agg(session_ctx->pubkeys, session_ctx->n_keys, &keyagg_ctx);
+
+    if (0 > musig_key_agg(session_ctx->pubkeys, session_ctx->n_keys, &keyagg_ctx)) {
+        return -1;
+    }
+
     for (size_t i = 0; i < session_ctx->n_tweaks; i++) {
         if (0 > apply_tweak(&keyagg_ctx, session_ctx->tweaks[i], session_ctx->is_xonly[i])) {
             return -1;