[openssl/openssl] 50001e: Avoid an unneccessary lock if we didn't add anythi...

[Matt Caswell]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 50001e0e15d4a96213c2eea7c56f80087afa89fd
      https://github.com/openssl/openssl/commit/50001e0e15d4a96213c2eea7c56f80087afa89fd
  Author: Matt Caswell <matt at openssl.org>
  Date:   2023-06-05 (Mon, 05 Jun 2023)

  Changed paths:
    M crypto/x509/by_dir.c

  Log Message:
  -----------
  Avoid an unneccessary lock if we didn't add anything to the store

Partially fixes #20286

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20952)


  Commit: 80935bf5ad309bf6c03591acf1d48fe1db57b78f
      https://github.com/openssl/openssl/commit/80935bf5ad309bf6c03591acf1d48fe1db57b78f
  Author: Matt Caswell <matt at openssl.org>
  Date:   2023-06-05 (Mon, 05 Jun 2023)

  Changed paths:
    M crypto/x509/x509_lu.c

  Log Message:
  -----------
  Don't take a write lock to retrieve a value from a stack

ossl_x509_store_ctx_get_by_subject() was taking a write lock for the
store, but was only (usually) retrieving a value from the stack of
objects. We take a read lock instead.

Partially fixes #20286

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20952)


Compare: https://github.com/openssl/openssl/compare/4c56539cb338...80935bf5ad30