Properly fix loading of embedded bytecode.

2013-09-20 11:36:33 +02:00 · 2013-09-20 11:36:33 +02:00 · 47df3ae513
parent 54af4e7c76
commit 47df3ae513
1 changed files with 2 additions and 1 deletions
--- a/src/lj_bcread.c
+++ b/src/lj_bcread.c
@ -446,7 +446,8 @@ GCproto *lj_bcread(LexState *ls)
    setprotoV(L, L->top, pt);
    incr_top(L);
  }
-  if (ls->p < ls->pe || L->top-1 != bcread_oldtop(L, ls))
+  if ((int32_t)(2*(uint32_t)(ls->pe - ls->p)) > 0 ||
+      L->top-1 != bcread_oldtop(L, ls))
    bcread_error(ls, LJ_ERR_BCBAD);
  /* Pop off last prototype. */
  L->top--;