[PATCH v2 3/6] tracing: Use copy_from_user_nul() instead of copy_from_user()

[Fushuai Wang]

From: Fushuai Wang <wangfushuai@xxxxxxxxx>

Use copy_from_user_nul() instead of copy_from_user() to simplify
the code.

No functional change.

Signed-off-by: Fushuai Wang <wangfushuai@xxxxxxxxx>
---
 kernel/trace/trace.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index baec63134ab6..b6ffd006fcf9 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -11266,10 +11266,9 @@ ssize_t trace_parse_run_command(struct file *file, const char __user *buffer,
 		if (size >= WRITE_BUFSIZE)
 			size = WRITE_BUFSIZE - 1;
 
-		if (copy_from_user(kbuf, buffer + done, size))
+		if (copy_from_user_nul(kbuf, buffer + done, size))
 			return -EFAULT;
 
-		kbuf[size] = '\0';
 		buf = kbuf;
 		do {
 			tmp = strchr(buf, '\n');
-- 
2.36.1