[glib-networking] openssl: explicitly NULL initialize PKCS8_PRIV_KEY_INFO

[Marge Bot <marge-bot src gnome org>]

commit 37d7c6af7cd54e440cf92547714ce4d47b5b6550
Author: Daniel Kolesa <daniel octaforge org>
Date:   Fri Jan 7 06:47:04 2022 +0100

    openssl: explicitly NULL initialize PKCS8_PRIV_KEY_INFO
    
    Otherwise, PKCS8_PRIV_KEY_INFO_free will be called on an
    uninitialized value if `!openssl->key` is true.
    
    This results in WebKit TLS being broken at least with OpenSSL 3.x
    and libsoup3.
    
    Part-of: <https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/201>

 tls/openssl/gtlscertificate-openssl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tls/openssl/gtlscertificate-openssl.c b/tls/openssl/gtlscertificate-openssl.c
index 2e3148c2..0bc7ea66 100644
--- a/tls/openssl/gtlscertificate-openssl.c
+++ b/tls/openssl/gtlscertificate-openssl.c
@@ -144,7 +144,7 @@ export_privkey_to_der (GTlsCertificateOpenssl  *openssl,
                        guint8                 **output_data,
                        long                    *output_size)
 {
-  PKCS8_PRIV_KEY_INFO *pkcs8;
+  PKCS8_PRIV_KEY_INFO *pkcs8 = NULL;
   BIO *bio = NULL;
   const guint8 *data;