Fix potential leaks when writing to BIO fails

When the BIO is created but writing fails, these can leak.

Closes GH-18186.

Author: nielsdos

NEWS

@@ -18,6 +18,7 @@ PHP                                                                        NEWS
 - OpenSSL:
   . Fix memory leak in openssl_sign() when passing invalid algorithm.
     (nielsdos)
+  . Fix potential leaks when writing to BIO fails. (nielsdos)
 
 - Standard:
   . Fixed bug GH-18145 (php8ts crashes in php_clear_stat_cache()).

ext/openssl/openssl.c

@@ -5742,8 +5742,8 @@ PHP_FUNCTION(openssl_pkcs7_read)
 				BIO_get_mem_ptr(bio_out, &bio_buf);
 				ZVAL_STRINGL(&zcert, bio_buf->data, bio_buf->length);
 				add_index_zval(zout, i, &zcert);
-				BIO_free(bio_out);
 			}
+			BIO_free(bio_out);
 		}
 	}
 
@@ -5757,8 +5757,8 @@ PHP_FUNCTION(openssl_pkcs7_read)
 				BIO_get_mem_ptr(bio_out, &bio_buf);
 				ZVAL_STRINGL(&zcert, bio_buf->data, bio_buf->length);
 				add_index_zval(zout, i, &zcert);
-				BIO_free(bio_out);
 			}
+			BIO_free(bio_out);
 		}
 	}
 
@@ -6383,8 +6383,8 @@ PHP_FUNCTION(openssl_cms_read)
 				BIO_get_mem_ptr(bio_out, &bio_buf);
 				ZVAL_STRINGL(&zcert, bio_buf->data, bio_buf->length);
 				add_index_zval(zout, i, &zcert);
-				BIO_free(bio_out);
 			}
+			BIO_free(bio_out);
 		}
 	}
 
@@ -6398,8 +6398,8 @@ PHP_FUNCTION(openssl_cms_read)
 				BIO_get_mem_ptr(bio_out, &bio_buf);
 				ZVAL_STRINGL(&zcert, bio_buf->data, bio_buf->length);
 				add_index_zval(zout, i, &zcert);
-				BIO_free(bio_out);
 			}
+			BIO_free(bio_out);
 		}
 	}