From d9a251a029f23e79c1ac394bc551ed5d536bc740 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 2 Jun 2022 12:08:25 +0300
Subject: [PATCH] ASoC: SOF: ipc-msg-injector: Propagate write errors correctly
Git-commit: d9a251a029f23e79c1ac394bc551ed5d536bc740
Patch-mainline: v5.19-rc2
References: jsc#PED-850
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.
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>
Acked-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/Yph+Cd+JrfOH0i7z@kili
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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;
if (size != count)
- 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;
if (size != sizeof(ipc4_msg->header_u64))
- 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;
if (size != count)
- return size > 0 ? -EFAULT : size;
+ return -EFAULT;
}
ipc4_msg->data_size = count;
--
2.35.3