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Avoid potential integer overflow.

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2019-05-16 10:13:52 +09:00
parent 752edf413f
commit 2f14254142
1 changed files with 3 additions and 2 deletions
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mrbgems/mruby-pack/src/pack.c
+3 -2
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@@ -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 == '*') {