struct ref *ref,
                        int check_old)
 {
-       char msg[1024];
+       char *msg;
        char *rla = getenv("GIT_REFLOG_ACTION");
        struct ref_transaction *transaction;
        struct strbuf err = STRBUF_INIT;
                return 0;
        if (!rla)
                rla = default_rla.buf;
-       snprintf(msg, sizeof(msg), "%s: %s", rla, action);
+       msg = xstrfmt("%s: %s", rla, action);
 
        transaction = ref_transaction_begin(&err);
        if (!transaction ||
 
        ref_transaction_free(transaction);
        strbuf_release(&err);
+       free(msg);
        return 0;
 fail:
        ref_transaction_free(transaction);
        error("%s", err.buf);
        strbuf_release(&err);
+       free(msg);
        return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
                           : STORE_REF_ERROR_OTHER;
 }