>
> In both image_encoders_restore_glz_dictionary() and
> image_encoders_get_glz_dictionary() shared-dict may
> be NULL if size is too large, and the server gets
> size from the network.
>
> Both functions end up calling glz_enc_dictionary_create()
> that calls glz_dictionary_window_create() where size is
> checked.
>
> Found by coverity.
>
> Signed-off-by: Uri Lublin <uril@xxxxxxxxxx>
> ---
> server/image-encoders.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/server/image-encoders.c b/server/image-encoders.c
> index 39aca6c..9dfabd6 100644
> --- a/server/image-encoders.c
> +++ b/server/image-encoders.c
> @@ -746,12 +746,13 @@ gboolean
> image_encoders_get_glz_dictionary(ImageEncoders *enc,
> shared_dict->refs++;
> } else {
> shared_dict = create_glz_dictionary(enc, client, id, window_size);
> + spice_return_val_if_fail(shared_dict != NULL, FALSE);
> glz_dictionary_list = g_list_prepend(glz_dictionary_list,
> shared_dict);
> }
>
> pthread_mutex_unlock(&glz_dictionary_list_lock);
> enc->glz_dict = shared_dict;
> - return shared_dict != NULL;
> + return TRUE;
> }
>
> static GlzSharedDictionary *restore_glz_dictionary(ImageEncoders *enc,
> @@ -782,12 +783,13 @@ gboolean
> image_encoders_restore_glz_dictionary(ImageEncoders *enc,
> shared_dict->refs++;
> } else {
> shared_dict = restore_glz_dictionary(enc, client, id, restore_data);
> + spice_return_val_if_fail(shared_dict != NULL, FALSE);
> glz_dictionary_list = g_list_prepend(glz_dictionary_list,
> shared_dict);
> }
>
> pthread_mutex_unlock(&glz_dictionary_list_lock);
> enc->glz_dict = shared_dict;
> - return shared_dict != NULL;
> + return TRUE;
> }
>
> gboolean image_encoders_glz_create(ImageEncoders *enc, uint8_t id)
Note that you are creating dead locks.
Beside that is not clear what the change could cause to the
upper layer.
I think the actual logic is supposing that dictionary creation (like
memory allocation) is not failing.
Frediano
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