Check return value from snprintf(); ref #3498

mruby · Mar 11, 2017 · e392231 · e392231
1 parent f9ed15d
commit e392231
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -1087,6 +1087,9 @@ mrb_str_format(mrb_state *mrb, int argc, const mrb_value *argv, mrb_value fmt)
 
         CHECK(need);
         n = snprintf(&buf[blen], need, fbuf, fval);
+        if (n < 0) {
+          mrb_raise(mrb, E_RUNTIME_ERROR, "formatting error");
+        }
         blen += n;
       }
       break;