[3/4] crypto: Fix memory leaks in set_loaded for tls-*

Commit Message

Kevin Wolf Nov. 30, 2020, 10:56 a.m. UTC

If you set the loaded property to true when it was already true, the
state is overwritten without freeing the old state first. Change the
set_loaded callback so that it always frees the old state (which is a
no-op if nothing was loaded) and only then load if requestsd.

Signed-off-by: Kevin Wolf <[e-mail]>
---
 crypto/tlscredsanon.c | 3 +--
 crypto/tlscredspsk.c  | 3 +--
 crypto/tlscredsx509.c | 3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

Patch

diff --git a/crypto/tlscredsanon.c b/crypto/tlscredsanon.c
index 30275b6847..bea5f76c55 100644
--- a/crypto/tlscredsanon.c
+++ b/crypto/tlscredsanon.c
@@ -123,10 +123,9 @@  qcrypto_tls_creds_anon_prop_set_loaded(Object *obj,
 {
     QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
 
+    qcrypto_tls_creds_anon_unload(creds);
     if (value) {
         qcrypto_tls_creds_anon_load(creds, errp);
-    } else {
-        qcrypto_tls_creds_anon_unload(creds);
     }
 }
 
diff --git a/crypto/tlscredspsk.c b/crypto/tlscredspsk.c
index e26807b899..f5a31108d1 100644
--- a/crypto/tlscredspsk.c
+++ b/crypto/tlscredspsk.c
@@ -192,10 +192,9 @@  qcrypto_tls_creds_psk_prop_set_loaded(Object *obj,
 {
     QCryptoTLSCredsPSK *creds = QCRYPTO_TLS_CREDS_PSK(obj);
 
+    qcrypto_tls_creds_psk_unload(creds);
     if (value) {
         qcrypto_tls_creds_psk_load(creds, errp);
-    } else {
-        qcrypto_tls_creds_psk_unload(creds);
     }
 }
 
diff --git a/crypto/tlscredsx509.c b/crypto/tlscredsx509.c
index dd7267ccdb..ed6e1dc202 100644
--- a/crypto/tlscredsx509.c
+++ b/crypto/tlscredsx509.c
@@ -694,10 +694,9 @@  qcrypto_tls_creds_x509_prop_set_loaded(Object *obj,
 {
     QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj);
 
+    qcrypto_tls_creds_x509_unload(creds);
     if (value) {
         qcrypto_tls_creds_x509_load(creds, errp);
-    } else {
-        qcrypto_tls_creds_x509_unload(creds);
     }
 }