Replace snprintf() with sysfs_emit() in sysfs show functions, which is
preferred for formatting sysfs output because it provides safer bounds
checking.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
 drivers/most/configfs.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/most/configfs.c b/drivers/most/configfs.c
index 8f5158d95bc3..f2aae6874b64 100644
--- a/drivers/most/configfs.c
+++ b/drivers/most/configfs.c
@@ -8,6 +8,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/sysfs.h>
 #include <linux/init.h>
 #include <linux/configfs.h>
 #include <linux/most.h>
@@ -159,7 +160,7 @@ static ssize_t mdev_link_destroy_link_store(struct config_item *item,
 
 static ssize_t mdev_link_direction_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->direction);
+	return sysfs_emit(page, "%s\n", to_mdev_link(item)->direction);
 }
 
 static ssize_t mdev_link_direction_store(struct config_item *item,
@@ -177,7 +178,7 @@ static ssize_t mdev_link_direction_store(struct config_item *item,
 
 static ssize_t mdev_link_datatype_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->datatype);
+	return sysfs_emit(page, "%s\n", to_mdev_link(item)->datatype);
 }
 
 static ssize_t mdev_link_datatype_store(struct config_item *item,
@@ -196,7 +197,7 @@ static ssize_t mdev_link_datatype_store(struct config_item *item,
 
 static ssize_t mdev_link_device_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->device);
+	return sysfs_emit(page, "%s\n", to_mdev_link(item)->device);
 }
 
 static ssize_t mdev_link_device_store(struct config_item *item,
@@ -211,7 +212,7 @@ static ssize_t mdev_link_device_store(struct config_item *item,
 
 static ssize_t mdev_link_channel_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->channel);
+	return sysfs_emit(page, "%s\n", to_mdev_link(item)->channel);
 }
 
 static ssize_t mdev_link_channel_store(struct config_item *item,
@@ -226,7 +227,7 @@ static ssize_t mdev_link_channel_store(struct config_item *item,
 
 static ssize_t mdev_link_comp_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->comp);
+	return sysfs_emit(page, "%s\n", to_mdev_link(item)->comp);
 }
 
 static ssize_t mdev_link_comp_store(struct config_item *item,
@@ -241,8 +242,7 @@ static ssize_t mdev_link_comp_store(struct config_item *item,
 
 static ssize_t mdev_link_comp_params_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%s\n",
-			to_mdev_link(item)->comp_params);
+	return sysfs_emit(page, "%s\n", to_mdev_link(item)->comp_params);
 }
 
 static ssize_t mdev_link_comp_params_store(struct config_item *item,
@@ -257,8 +257,7 @@ static ssize_t mdev_link_comp_params_store(struct config_item *item,
 
 static ssize_t mdev_link_num_buffers_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%d\n",
-			to_mdev_link(item)->num_buffers);
+	return sysfs_emit(page, "%d\n", to_mdev_link(item)->num_buffers);
 }
 
 static ssize_t mdev_link_num_buffers_store(struct config_item *item,
@@ -275,8 +274,7 @@ static ssize_t mdev_link_num_buffers_store(struct config_item *item,
 
 static ssize_t mdev_link_buffer_size_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%d\n",
-			to_mdev_link(item)->buffer_size);
+	return sysfs_emit(page, "%d\n", to_mdev_link(item)->buffer_size);
 }
 
 static ssize_t mdev_link_buffer_size_store(struct config_item *item,
@@ -294,8 +292,7 @@ static ssize_t mdev_link_buffer_size_store(struct config_item *item,
 static ssize_t mdev_link_subbuffer_size_show(struct config_item *item,
 					     char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%d\n",
-			to_mdev_link(item)->subbuffer_size);
+	return sysfs_emit(page, "%d\n", to_mdev_link(item)->subbuffer_size);
 }
 
 static ssize_t mdev_link_subbuffer_size_store(struct config_item *item,
@@ -313,8 +310,7 @@ static ssize_t mdev_link_subbuffer_size_store(struct config_item *item,
 static ssize_t mdev_link_packets_per_xact_show(struct config_item *item,
 					       char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%d\n",
-			to_mdev_link(item)->packets_per_xact);
+	return sysfs_emit(page, "%d\n", to_mdev_link(item)->packets_per_xact);
 }
 
 static ssize_t mdev_link_packets_per_xact_store(struct config_item *item,
@@ -331,7 +327,7 @@ static ssize_t mdev_link_packets_per_xact_store(struct config_item *item,
 
 static ssize_t mdev_link_dbr_size_show(struct config_item *item, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%d\n", to_mdev_link(item)->dbr_size);
+	return sysfs_emit(page, "%d\n", to_mdev_link(item)->dbr_size);
 }
 
 static ssize_t mdev_link_dbr_size_store(struct config_item *item,

Gentle ping?

On Mon, May 04, 2026 at 08:16:00PM +0200, Thorsten Blum wrote:
> Replace snprintf() with sysfs_emit() in sysfs show functions, which is
> preferred for formatting sysfs output because it provides safer bounds
> checking.
> 
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
> ---
>  drivers/most/configfs.c | 28 ++++++++++++----------------
>  1 file changed, 12 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/most/configfs.c b/drivers/most/configfs.c
> index 8f5158d95bc3..f2aae6874b64 100644
> --- a/drivers/most/configfs.c
> +++ b/drivers/most/configfs.c
> @@ -8,6 +8,7 @@
>  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>  #include <linux/module.h>
>  #include <linux/slab.h>
> +#include <linux/sysfs.h>
>  #include <linux/init.h>
>  #include <linux/configfs.h>
>  #include <linux/most.h>
> @@ -159,7 +160,7 @@ static ssize_t mdev_link_destroy_link_store(struct config_item *item,
>  
>  static ssize_t mdev_link_direction_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->direction);
> +	return sysfs_emit(page, "%s\n", to_mdev_link(item)->direction);
>  }
>  
>  static ssize_t mdev_link_direction_store(struct config_item *item,
> @@ -177,7 +178,7 @@ static ssize_t mdev_link_direction_store(struct config_item *item,
>  
>  static ssize_t mdev_link_datatype_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->datatype);
> +	return sysfs_emit(page, "%s\n", to_mdev_link(item)->datatype);
>  }
>  
>  static ssize_t mdev_link_datatype_store(struct config_item *item,
> @@ -196,7 +197,7 @@ static ssize_t mdev_link_datatype_store(struct config_item *item,
>  
>  static ssize_t mdev_link_device_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->device);
> +	return sysfs_emit(page, "%s\n", to_mdev_link(item)->device);
>  }
>  
>  static ssize_t mdev_link_device_store(struct config_item *item,
> @@ -211,7 +212,7 @@ static ssize_t mdev_link_device_store(struct config_item *item,
>  
>  static ssize_t mdev_link_channel_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->channel);
> +	return sysfs_emit(page, "%s\n", to_mdev_link(item)->channel);
>  }
>  
>  static ssize_t mdev_link_channel_store(struct config_item *item,
> @@ -226,7 +227,7 @@ static ssize_t mdev_link_channel_store(struct config_item *item,
>  
>  static ssize_t mdev_link_comp_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->comp);
> +	return sysfs_emit(page, "%s\n", to_mdev_link(item)->comp);
>  }
>  
>  static ssize_t mdev_link_comp_store(struct config_item *item,
> @@ -241,8 +242,7 @@ static ssize_t mdev_link_comp_store(struct config_item *item,
>  
>  static ssize_t mdev_link_comp_params_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%s\n",
> -			to_mdev_link(item)->comp_params);
> +	return sysfs_emit(page, "%s\n", to_mdev_link(item)->comp_params);
>  }
>  
>  static ssize_t mdev_link_comp_params_store(struct config_item *item,
> @@ -257,8 +257,7 @@ static ssize_t mdev_link_comp_params_store(struct config_item *item,
>  
>  static ssize_t mdev_link_num_buffers_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%d\n",
> -			to_mdev_link(item)->num_buffers);
> +	return sysfs_emit(page, "%d\n", to_mdev_link(item)->num_buffers);
>  }
>  
>  static ssize_t mdev_link_num_buffers_store(struct config_item *item,
> @@ -275,8 +274,7 @@ static ssize_t mdev_link_num_buffers_store(struct config_item *item,
>  
>  static ssize_t mdev_link_buffer_size_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%d\n",
> -			to_mdev_link(item)->buffer_size);
> +	return sysfs_emit(page, "%d\n", to_mdev_link(item)->buffer_size);
>  }
>  
>  static ssize_t mdev_link_buffer_size_store(struct config_item *item,
> @@ -294,8 +292,7 @@ static ssize_t mdev_link_buffer_size_store(struct config_item *item,
>  static ssize_t mdev_link_subbuffer_size_show(struct config_item *item,
>  					     char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%d\n",
> -			to_mdev_link(item)->subbuffer_size);
> +	return sysfs_emit(page, "%d\n", to_mdev_link(item)->subbuffer_size);
>  }
>  
>  static ssize_t mdev_link_subbuffer_size_store(struct config_item *item,
> @@ -313,8 +310,7 @@ static ssize_t mdev_link_subbuffer_size_store(struct config_item *item,
>  static ssize_t mdev_link_packets_per_xact_show(struct config_item *item,
>  					       char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%d\n",
> -			to_mdev_link(item)->packets_per_xact);
> +	return sysfs_emit(page, "%d\n", to_mdev_link(item)->packets_per_xact);
>  }
>  
>  static ssize_t mdev_link_packets_per_xact_store(struct config_item *item,
> @@ -331,7 +327,7 @@ static ssize_t mdev_link_packets_per_xact_store(struct config_item *item,
>  
>  static ssize_t mdev_link_dbr_size_show(struct config_item *item, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%d\n", to_mdev_link(item)->dbr_size);
> +	return sysfs_emit(page, "%d\n", to_mdev_link(item)->dbr_size);
>  }
>  
>  static ssize_t mdev_link_dbr_size_store(struct config_item *item,