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5b4c461701
The BZ 32653 fix (12a497c716) kept the stack pointer zeroing from make_main_stack_executable on _dl_make_stack_executable. However, previously the 'stack_endp' pointed to temporary variable created before the call of _dl_map_object_from_fd; while now we use the __libc_stack_end directly. Since pthread_getattr_np relies on correct __libc_stack_end, if _dl_make_stack_executable is called (for instance, when glibc.rtld.execstack=2 is set) __libc_stack_end will be set to zero, and the call will always fail. The __libc_stack_end zero was used a mitigation hardening, but since52a01100adit is used solely on pthread_getattr_np code. So there is no point in zeroing anymore. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Sam James <sam@gentoo.org> (cherry picked from commit0c34259423)