https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66826
--- Comment #4 from Yuri Gribov <tetra2005 at gmail dot com> --- As this is not a GCC bug I suggest you * close this issue (as not-a-bug?) * report to Glibc folks (perhaps they could do more checking of return address or at least document their calling convention assumptions in manpages)