[openssl/openssl] bf2f9e: Fix memory leak in cmp_calc_protection()

[slontis]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.openssl.org/openssl/openssl
  Commit: bf2f9e8b3117bbc2f4528bc91cf23b7ae689324c
      https://github.openssl.org/openssl/openssl/commit/bf2f9e8b3117bbc2f4528bc91cf23b7ae689324c
  Author: slontis <shane.lontis at oracle.com>
  Date:   2022-06-29 (Wed, 29 Jun 2022)

  Changed paths:
    M crypto/cmp/cmp_protect.c

  Log Message:
  -----------
  Fix memory leak in cmp_calc_protection()

Triggered by a  memory allocation failure.
Detected by PR #18355

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: David von Oheimb <david.von.oheimb at siemens.com>
(Merged from https://github.com/openssl/openssl/pull/18670)