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

From: Kevin Wolf <kwolf@redhat.com>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, jasowang@redhat.com, fnu.vikram@xilinx.com,
	berrange@redhat.com, pisa@cmp.felk.cvut.cz
Subject: [PATCH 3/4] crypto: Fix memory leaks in set_loaded for tls-*
Date: Mon, 30 Nov 2020 11:56:14 +0100	[thread overview]
Message-ID: <20201130105615.21799-4-kwolf@redhat.com> (raw)
In-Reply-To: <20201130105615.21799-1-kwolf@redhat.com>

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 <kwolf@redhat.com>
---
 crypto/tlscredsanon.c | 3 +--
 crypto/tlscredspsk.c  | 3 +--
 crypto/tlscredsx509.c | 3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

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);
     }
 }
 
-- 
2.28.0


