Original author: Nevine Ebeid (Amazon)
Fixes: CVE-2023-1255

The buffer overread happens on decrypts of 4 mod 5 sizes.
Unless the memory just after the buffer is unmapped this is harmless.
Reviewed-by: NPaul Dale <pauli@openssl.org>
Reviewed-by: NTom Cosgrove <tom.cosgrove@arm.com>
(Merged from https://github.com/openssl/openssl/pull/20759)

(cherry picked from commit 72dfe46550ee1f1bbfacd49f071419365bc23304)
Signed-off-by: Ncode4lala <fengziteng2@huawei.com>
Change-Id: I636543b8cf34e1edaeee4d1c0d5617eb500a24a6