4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
[ Upstream commit 964946b88887089f447a9b6a28c39ee97dc76360 ]
The ending NULL is not taken into account by strncat(), so switch to
snprintf() to correctly build 'debug_name'.
Using snprintf() also makes the code more readable.
Fixes: aa276781a64a ("firmware: Add basic support for TI System Control Interface (TI-SCI) protocol")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Link: https://lore.kernel.org/r/7158db0a4d7b19855ddd542ec61b666973aad8dc.1698660720.git.christophe.jaillet@xxxxxxxxxx
Signed-off-by: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/firmware/ti_sci.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 46acc6440b9a..639e0481f952 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -176,7 +176,7 @@ static int ti_sci_debugfs_create(struct platform_device *pdev,
{
struct device *dev = &pdev->dev;
struct resource *res;
- char debug_name[50] = "ti_sci_debug@";
+ char debug_name[50];
/* Debug region is optional */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -193,10 +193,10 @@ static int ti_sci_debugfs_create(struct platform_device *pdev,
/* Setup NULL termination */
info->debug_buffer[info->debug_region_size] = 0;
- info->d = debugfs_create_file(strncat(debug_name, dev_name(dev),
- sizeof(debug_name) -
- sizeof("ti_sci_debug@")),
- 0444, NULL, info, &ti_sci_debug_fops);
+ snprintf(debug_name, sizeof(debug_name), "ti_sci_debug@%s",
+ dev_name(dev));
+ info->d = debugfs_create_file(debug_name, 0444, NULL, info,
+ &ti_sci_debug_fops);
if (IS_ERR(info->d))
return PTR_ERR(info->d);
--
2.43.0
