On 02/06/2022 12:08, Dan Carpenter wrote:
This code is supposed to propagate errors from simple_write_to_buffer() or return -EFAULT if "size != count". However "size" needs to be signed for the code to work correctly and the case where "size == 0" is not handled correctly.
Thanks Dan!
Acked-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com
Fixes: 066c67624d8c ("ASoC: SOF: ipc-msg-injector: Add support for IPC4 messages") Fixes: 2f0b1b013bbc ("ASoC: SOF: debug: Add support for IPC message injection") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com
sound/soc/sof/sof-client-ipc-msg-injector.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/sound/soc/sof/sof-client-ipc-msg-injector.c b/sound/soc/sof/sof-client-ipc-msg-injector.c index 03490a4d4ae7..030cb97d7713 100644 --- a/sound/soc/sof/sof-client-ipc-msg-injector.c +++ b/sound/soc/sof/sof-client-ipc-msg-injector.c @@ -150,7 +150,7 @@ static ssize_t sof_msg_inject_dfs_write(struct file *file, const char __user *bu { struct sof_client_dev *cdev = file->private_data; struct sof_msg_inject_priv *priv = cdev->data;
- size_t size;
ssize_t size; int ret;
if (*ppos)
@@ -158,8 +158,10 @@ static ssize_t sof_msg_inject_dfs_write(struct file *file, const char __user *bu
size = simple_write_to_buffer(priv->tx_buffer, priv->max_msg_size, ppos, buffer, count);
- if (size < 0)
return size;
return size > 0 ? -EFAULT : size;
return -EFAULT;memset(priv->rx_buffer, 0, priv->max_msg_size);
@@ -179,7 +181,7 @@ static ssize_t sof_msg_inject_ipc4_dfs_write(struct file *file, struct sof_client_dev *cdev = file->private_data; struct sof_msg_inject_priv *priv = cdev->data; struct sof_ipc4_msg *ipc4_msg = priv->tx_buffer;
- size_t size;
ssize_t size; int ret;
if (*ppos)
@@ -192,8 +194,10 @@ static ssize_t sof_msg_inject_ipc4_dfs_write(struct file *file, size = simple_write_to_buffer(&ipc4_msg->header_u64, sizeof(ipc4_msg->header_u64), ppos, buffer, count);
- if (size < 0)
return size;
return size > 0 ? -EFAULT : size;
return -EFAULT;count -= size; if (!count) {
@@ -201,8 +205,10 @@ static ssize_t sof_msg_inject_ipc4_dfs_write(struct file *file, size = simple_write_to_buffer(ipc4_msg->data_ptr, priv->max_msg_size, ppos, buffer, count);
if (size < 0)return size;
return size > 0 ? -EFAULT : size;
return -EFAULT;}
ipc4_msg->data_size = count;