[PATCH 4/7] ALSA: caiaq: replace strlcat() with strscpy()

[Mahad Ibrahim]

usb_make_path() fills cdev->phys with the device path, and "/input0"
was then appended with strlcat().

Take the length of the path with strlen() and write the suffix at
that offset with strscpy(), passing the remaining space in the
buffer.

cdev->phys is NUL-terminated by usb_make_path(), so the offset is
within the array and the size passed to strscpy() is at least one.
The suffix lands in the same place and truncates at the same point.

Signed-off-by: Mahad Ibrahim <mahad.ibrahim.dev@xxxxxxxxx>
---
 sound/usb/caiaq/input.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/usb/caiaq/input.c b/sound/usb/caiaq/input.c
index 8d924330c54c..fd4c80c7530c 100644
--- a/sound/usb/caiaq/input.c
+++ b/sound/usb/caiaq/input.c
@@ -604,14 +604,15 @@ int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *cdev)
 {
 	struct usb_device *usb_dev = cdev->chip.dev;
 	struct input_dev *input;
-	int i, ret = 0;
+	int i, len, ret = 0;
 
 	input = input_allocate_device();
 	if (!input)
 		return -ENOMEM;
 
 	usb_make_path(usb_dev, cdev->phys, sizeof(cdev->phys));
-	strlcat(cdev->phys, "/input0", sizeof(cdev->phys));
+	len = strlen(cdev->phys);
+	strscpy(cdev->phys + len, "/input0", sizeof(cdev->phys) - len);
 
 	input->name = cdev->product_name;
 	input->phys = cdev->phys;
-- 
2.54.0