Hi,
Please find attached the proposed patch for Bug 69687:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69687
* Limiting the length of the mangled string to 264k characters.
* Limiting the loop iterations to 256 (max. of C++ function parameters).
--- a/libiberty/cplus-dem.c
+++ b/libiberty/cplus-dem.c
@@ -847,6 +847,13 @@
char *
cplus_demangle (const char *mangled, int options)
{
+ /** Limit the maximum length of mangled.
+ * C++ Std, Annex B (Implementation quantities):
+ * - Number of characters in an internal identifier or macro name [1 024].
+ * - Arguments in one function call [256]. */
+ if (mangled && strlen (mangled) > 263168)
+ return xstrdup (mangled);
+
char *ret;
struct work_stuff work[1];
@@ -4488,6 +4495,8 @@
{
return (0);
}
+ /* C++ Standard Annex B: Parameters in one function definition
[256].*/
+ if (r > 256) r = 256;
while (work->nrepeats > 0 || --r >= 0)
{
tem = work -> typevec[t];
Best regards,
- Marcel
