Use memdup_user_nul() helper instead of open-coding to
simplify the code.
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
drivers/staging/greybus/camera.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/drivers/staging/greybus/camera.c b/drivers/staging/greybus/camera.c
index b570e13394ac..2ecdc1bc5092 100644
--- a/drivers/staging/greybus/camera.c
+++ b/drivers/staging/greybus/camera.c
@@ -1120,16 +1120,9 @@ static ssize_t gb_camera_debugfs_write(struct file *file,
if (len > 1024)
return -EINVAL;
- kbuf = kmalloc(len + 1, GFP_KERNEL);
- if (!kbuf)
- return -ENOMEM;
-
- if (copy_from_user(kbuf, buf, len)) {
- ret = -EFAULT;
- goto done;
- }
-
- kbuf[len] = '\0';
+ kbuf = memdup_user_nul(buf, len);
+ if (IS_ERR(kbuf))
+ return PTR_ERR(kbuf);;
ret = op->execute(gcam, kbuf, len);
--
2.25.1
