From: Peter Ujfalusi Date: Wed, 9 Mar 2022 11:01:04 +0000 (+0200) Subject: ASoC: SOF: ipc-msg-injector: Use devm_kzalloc() for the rx_buffer X-Git-Tag: baikal/aarch64/sdk6.1~4422^2~7^2~36 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=de8c4e7ae72a5ba41d2c2a6dd1c9f37a5f54107a;p=kernel.git ASoC: SOF: ipc-msg-injector: Use devm_kzalloc() for the rx_buffer The rx_buffer is cleared before sending an IPC to make sure that when the /sys/kernel/debug/sof/ipc_msg_inject file is read we will have correct information in the buffer (no random or stale data). But if the user reads the file before sending any message the buffer might contain garbage which should not be interpreted. To prevent this, clear the rx_buffer on allocation. Fixes: fe7be92b8b75 ("ASoC: SOF: Convert the generic IPC message injector into SOF client") Signed-off-by: Peter Ujfalusi Reviewed-by: Bard Liao Reviewed-by: Ranjani Sridharan Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20220309110104.18370-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown --- diff --git a/sound/soc/sof/sof-client-ipc-msg-injector.c b/sound/soc/sof/sof-client-ipc-msg-injector.c index bce103da4c49d..dba6cfd7db092 100644 --- a/sound/soc/sof/sof-client-ipc-msg-injector.c +++ b/sound/soc/sof/sof-client-ipc-msg-injector.c @@ -137,7 +137,7 @@ static int sof_msg_inject_probe(struct auxiliary_device *auxdev, return -ENOMEM; priv->tx_buffer = devm_kmalloc(dev, SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL); - priv->rx_buffer = devm_kmalloc(dev, SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL); + priv->rx_buffer = devm_kzalloc(dev, SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL); if (!priv->tx_buffer || !priv->rx_buffer) return -ENOMEM;