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Merge pull request #4012 from take-cheeze/fix_heap_use_after_free

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Fix heap use after free on mruby-aws-sigv4.
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Yukihiro "Matz" Matsumoto
2018-04-28 10:08:20 +09:00
committed by GitHub
parent 1b261382a0 b8869498b7
commit b956c0f43c
1 changed files with 2 additions and 0 deletions
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src/vm.c
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@@ -527,6 +527,8 @@ mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p)
return MRB_PROC_CFUNC(p)(mrb, self);
}
ci->nregs = p->body.irep->nregs;
ci->env = MRB_PROC_ENV(p);
if (ci->env) ci->env->stack[0] = self;
if (ci->argc < 0) keep = 3;
else keep = ci->argc + 2;
if (ci->nregs < keep) {