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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	Kai Vehmanen <kai.vehmanen@linux.intel.com>,
	Daniel Baluta <daniel.baluta@nxp.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>,
	Bard Liao <yung-chuan.liao@linux.intel.com>,
	Rander Wang <rander.wang@intel.com>,
	sound-open-firmware@alsa-project.org,
	alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org,
	Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Subject: [PATCH 1/2] ASoC: SOF: ipc-msg-injector: Propagate write errors correctly
Date: Thu, 2 Jun 2022 12:08:25 +0300	[thread overview]
Message-ID: <Yph+Cd+JrfOH0i7z@kili> (raw)

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>
---
 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;
-- 
2.35.1


WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Cc: alsa-devel@alsa-project.org,
	Kai Vehmanen <kai.vehmanen@linux.intel.com>,
	Bard Liao <yung-chuan.liao@linux.intel.com>,
	Takashi Iwai <tiwai@suse.com>,
	kernel-janitors@vger.kernel.org,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>,
	Rander Wang <rander.wang@intel.com>,
	Daniel Baluta <daniel.baluta@nxp.com>,
	sound-open-firmware@alsa-project.org
Subject: [PATCH 1/2] ASoC: SOF: ipc-msg-injector: Propagate write errors correctly
Date: Thu, 2 Jun 2022 12:08:25 +0300	[thread overview]
Message-ID: <Yph+Cd+JrfOH0i7z@kili> (raw)

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>
---
 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;
-- 
2.35.1


             reply	other threads:[~2022-06-02  9:09 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-02  9:08 Dan Carpenter [this message]
2022-06-02  9:08 ` [PATCH 1/2] ASoC: SOF: ipc-msg-injector: Propagate write errors correctly Dan Carpenter
2022-06-02  9:09 ` [PATCH 2/2] ASoC: SOF: ipc-msg-injector: Fix reversed if statement Dan Carpenter
2022-06-02  9:09   ` Dan Carpenter
2022-06-03  9:49   ` Péter Ujfalusi
2022-06-03  9:49     ` Péter Ujfalusi
2022-06-03  9:48 ` [PATCH 1/2] ASoC: SOF: ipc-msg-injector: Propagate write errors correctly Péter Ujfalusi
2022-06-03  9:48   ` Péter Ujfalusi
2022-06-07 10:46 ` Mark Brown
2022-06-07 10:46   ` Mark Brown

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