Avoid potential integer overflow.
MODIFY
mrbgems/mruby-pack/src/pack.c
mrbgems/mruby-pack/src/pack.c
@@ -1075,10 +1075,11 @@ alias:
if (ISDIGIT(ch)) {
count = ch - '0';
while (tmpl->idx < tlen && ISDIGIT(tptr[tmpl->idx])) {
- count = count * 10 + (tptr[tmpl->idx++] - '0');
- if (count < 0) {
+ int ch = tptr[tmpl->idx++] - '0';
+ if (count+ch > INT_MAX/10) {
mrb_raise(mrb, E_RUNTIME_ERROR, "too big template length");
}
+ count = count * 10 + ch;
}
continue; /* special case */
} else if (ch == '*') {

Avoid potential integer overflow.