summaryrefslogtreecommitdiff
path: root/string.c
diff options
context:
space:
mode:
Diffstat (limited to 'string.c')
-rw-r--r--string.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/string.c b/string.c
index 1e4d867..049b088 100644
--- a/string.c
+++ b/string.c
@@ -1914,6 +1914,9 @@ rb_str_modify_expand(VALUE str, long expand)
else if (expand > 0) {
long len = RSTRING_LEN(str);
long capa = len + expand;
+ if (expand >= LONG_MAX - len - termlen) {
+ rb_raise(rb_eArgError, "string size too big");
+ }
if (!STR_EMBED_P(str)) {
REALLOC_N(RSTRING(str)->as.heap.ptr, char, capa + termlen);
RSTRING(str)->as.heap.aux.capa = capa;