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pack.c: failed to detect overflow when ch is zero in read_tmpl.

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Yukihiro "Matz" Matsumoto
2021-06-06 07:57:21 +09:00
parent f01c29b0ec
commit af3e0ddfc0
1 changed files with 2 additions and 2 deletions
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mrbgems/mruby-pack/src/pack.c
+2 -2
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@@ -1131,8 +1131,8 @@ alias:
if (ISDIGIT(ch)) {
count = ch - '0';
while (tmpl->idx < tlen && ISDIGIT(tptr[tmpl->idx])) {
int ch = tptr[tmpl->idx++] - '0';
if (count+ch > INT_MAX/10) {
ch = tptr[tmpl->idx++] - '0';
if (count+10 > INT_MAX/10) {
mrb_raise(mrb, E_RUNTIME_ERROR, "too big template length");
}
count = count * 10 + ch;