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vtls/rustls: simplify builder cleanup

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Don't build `config_builder` just to free the resulting config, free the
builder directly.

When `cr_init_backend` encounters an error condition setting up the
Rustls client configuration it must do something with the
`config_builder` that was constructed earlier to avoid a memory leak.

The previous implementation preferred to use a pattern of building the
builder (thus consuming it) and then freeing the built config (to avoid
a memory leak). However, the purpose/intent is clearer when we just free
the builder directly instead of building it and freeing the result.

Closes #14889
This commit is contained in:
Daniel McCarney 2024-07-19 12:23:18 -04:00 committed by Daniel Stenberg
parent bef0acaf21
commit d38458d823
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GPG Key ID: 5CC908FDB71E12C2
1 changed files with 4 additions and 8 deletions
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12
lib/vtls/rustls.c
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@ -646,8 +646,7 @@ cr_init_backend(struct Curl_cfilter *cf, struct Curl_easy *data,
if(result != RUSTLS_RESULT_OK) {
failf(data, "rustls: failed to parse trusted certificates from blob");
rustls_root_cert_store_builder_free(roots_builder);
rustls_client_config_free(
rustls_client_config_builder_build(config_builder));
rustls_client_config_builder_free(config_builder);
return CURLE_SSL_CACERT_BADFILE;
}
}
@ -658,8 +657,7 @@ cr_init_backend(struct Curl_cfilter *cf, struct Curl_easy *data,
if(result != RUSTLS_RESULT_OK) {
failf(data, "rustls: failed to load trusted certificates");
rustls_root_cert_store_builder_free(roots_builder);
rustls_client_config_free(
rustls_client_config_builder_build(config_builder));
rustls_client_config_builder_free(config_builder);
return CURLE_SSL_CACERT_BADFILE;
}
}
@ -668,8 +666,7 @@ cr_init_backend(struct Curl_cfilter *cf, struct Curl_easy *data,
rustls_root_cert_store_builder_free(roots_builder);
if(result != RUSTLS_RESULT_OK) {
failf(data, "rustls: failed to load trusted certificates");
rustls_client_config_free(
rustls_client_config_builder_build(config_builder));
rustls_client_config_builder_free(config_builder);
return CURLE_SSL_CACERT_BADFILE;
}
@ -704,8 +701,7 @@ cr_init_backend(struct Curl_cfilter *cf, struct Curl_easy *data,
if(result != RUSTLS_RESULT_OK) {
failf(data, "rustls: failed to load trusted certificates");
rustls_server_cert_verifier_free(server_cert_verifier);
rustls_client_config_free(
rustls_client_config_builder_build(config_builder));
rustls_client_config_builder_free(config_builder);
return CURLE_SSL_CACERT_BADFILE;
}