[openssl/openssl] 62ea5f: tls1_set_groups_list: freeing *pext before overwri...

[openssl-machine]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 62ea5ffa7c8882ba90b26ab1deb0d977dcb5165c
      https://github.com/openssl/openssl/commit/62ea5ffa7c8882ba90b26ab1deb0d977dcb5165c
  Author: Peter Kaestle <peter.kaestle at nokia.com>
  Date:   2023-03-24 (Fri, 24 Mar 2023)

  Changed paths:
    M ssl/t1_lib.c

  Log Message:
  -----------
  tls1_set_groups_list: freeing *pext before overwriting

calling SSL_CTX_set1_groups_list() twice on one SSL_CTX* caused a memory
leak visible in valgrind:
  4 bytes in 1 blocks are definitely lost in loss record 1 of 1
     at 0x4841888: malloc (vg_replace_malloc.c:381)
     by 0x4B1EE96: CRYPTO_memdup (in libcrypto.so.3)
     by 0x48993A0: tls1_set_groups_list (in libssl.so.3)
     by 0x487AA7E: ssl3_ctx_ctrl (in libssl.so.3)
     by 0x1091EA: main (mem_leak.c:10)

  LEAK SUMMARY:
     definitely lost: 4 bytes in 1 blocks

Freeing *pext to fix it.

CLA: trivial

Signed-off-by: Peter Kaestle <peter.kaestle at nokia.com>

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Richard Levitte <levitte at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20317)

(cherry picked from commit fcf3a9f7c6a10acb2d92f03aec5e45df7dd712d5)