Re: [alsa-devel] [PATCH v4 15/24] ASoC: qdsp6: q6core: Add q6core driver

[Rohit Kumar]

On 3/10/2018 7:54 AM, srinivas.kandagatla@xxxxxxxxxx wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
[..]
> +static int q6core_get_svc_versions(struct q6core *core)
> +{
> +	struct apr_device *adev = core->adev;
> +	struct apr_hdr hdr = {0};
> +	int rc;
> +
> +	core->get_version_supported = true;

core->get_version_supported should be set to true only after we get proper response from adsp in callback(). In case,we get wrong response from adsp, memory for g_core->svc_version
 will not get allocated and there will be NULL pointer dereference in  q6core_get_svc_api_info() in below statement
+	} else if (g_core->get_version_supported) {
+		for (i = 0; i < g_core->svc_version->num_services; i++) {
 

> +	hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
> +				      APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER);
> +	hdr.pkt_size = APR_HDR_SIZE;
> +	hdr.opcode = AVCS_GET_VERSIONS;
> +
> +	rc = apr_send_pkt(adev, &hdr);
> +	if (rc < 0)
> +		return rc;
> +