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virtio-crypto: fix uninitialized variables

Message ID 1480126123-161960-1-git-send-email-arei.gonglei@huawei.com (mailing list archive)
State New, archived
Headers show

Commit Message

Gonglei (Arei) Nov. 26, 2016, 2:08 a.m. UTC 
Though crypto_cfg.reserve is an unused field, let me
initialize it in order to make coverity happy.

*** CID 1365923:  Uninitialized variables  (UNINIT)
/hw/virtio/virtio-crypto.c: 851 in virtio_crypto_get_config()
845         stl_le_p(&crypto_cfg.mac_algo_h, c->conf.mac_algo_h);
846         stl_le_p(&crypto_cfg.aead_algo, c->conf.aead_algo);
847         stl_le_p(&crypto_cfg.max_cipher_key_len, c->conf.max_cipher_key_len);
848         stl_le_p(&crypto_cfg.max_auth_key_len, c->conf.max_auth_key_len);
849         stq_le_p(&crypto_cfg.max_size, c->conf.max_size);
850
>>>     CID 1365923:  Uninitialized variables  (UNINIT)
>>>     Using uninitialized value "crypto_cfg". Field "crypto_cfg.reserve"
       is uninitialized when calling "memcpy".
      [Note: The source code implementation of the function
       has been overridden by a builtin model.]
851         memcpy(config, &crypto_cfg, c->config_size);
852     }
853

Rported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
---
 hw/virtio/virtio-crypto.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
index 847dc9d..a4cda19 100644
--- a/hw/virtio/virtio-crypto.c
+++ b/hw/virtio/virtio-crypto.c
@@ -856,6 +856,8 @@  static void virtio_crypto_get_config(VirtIODevice *vdev, uint8_t *config)
     stl_le_p(&crypto_cfg.max_cipher_key_len, c->conf.max_cipher_key_len);
     stl_le_p(&crypto_cfg.max_auth_key_len, c->conf.max_auth_key_len);
     stq_le_p(&crypto_cfg.max_size, c->conf.max_size);
+    /* Reserved field */
+    crypto_cfg.reserve = 0;
 
     memcpy(config, &crypto_cfg, c->config_size);
 }