https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69533
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- Ugh, totally insufficient patch. Probably warrants a CVE, I'm sure some of them we optimized before, like old_size = sz; sz += a; if (sz < old_size) ... I'll dig further (just look for PyExc_OverflowError) and when I get the testsuite clean bug our security guys with a patch.