Jump address should fit in 16 bits range; fix #3426

6e0ba008 · Yukihiro "Matz" Matsumoto · a746ebe9 · 6e0ba008
Commit 6e0ba008 authored Feb 04, 2017 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-compiler/core/codegen.c mrbgems/mruby-compiler/core/codegen.c +3 -0

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--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -388,6 +388,9 @@ dispatch(codegen_scope *s, int pc)
    scope_error(s);
    break;
  }
+  if (diff > MAXARG_sBx) {
+    codegen_error(s, "too distant jump address");
+  }
  s->iseq[pc] = MKOP_AsBx(c, GETARG_A(i), diff);
 }