check i2d_ASN1_TYPE return value
add a length check to the return value of function i2d_ASN1_TYPE. Return an error instead of trying to malloc a negative number.
CLA: trivial
@@ -280,6 +280,8 @@ static int do_dump(unsigned long lflags, char_io *io_ch, void *arg,
t.type = str->type;
t.value.ptr = (char *)str;
der_len = i2d_ASN1_TYPE(&t, NULL);
+ if (der_len <= 0)
+ return -1;
if ((der_buf = OPENSSL_malloc(der_len)) == NULL) {
ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
return -1;
