Check negative offset in `pack` method; fix
MODIFY
mrbgems/mruby-pack/src/pack.c
mrbgems/mruby-pack/src/pack.c
@@ -107,6 +107,9 @@ static mrb_value
str_len_ensure(mrb_state *mrb, mrb_value str, mrb_int len)
{
mrb_int n = RSTRING_LEN(str);
+ if (len < 0) {
+ mrb_raise(mrb, E_RANGE_ERROR, "negative (or overflowed) integer");
+ }
if (len > n) {
do {
n *= 2;
@@ -840,7 +843,6 @@ pack_x(mrb_state *mrb, mrb_value src, mrb_value dst, mrb_int didx, long count, u
}
return count;
}
-
static int
unpack_x(mrb_state *mrb, const void *src, int slen, mrb_value ary, int count, unsigned int flags)
{
@@ -1176,6 +1178,9 @@ mrb_pack_pack(mrb_state *mrb, mrb_value ary)
count--;
}
}
+ if (ridx < 0) {
+ mrb_raise(mrb, E_RANGE_ERROR, "negative (or overflowed) template size");
+ }
}
mrb_str_resize(mrb, result, ridx);

Check negative offset in `pack` method; fix #3944