Re: [PATCH v2 3/6] tracing: Use copy_from_user_nul() instead of copy_from_user()
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2026-01-12 15:43:12
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On Mon, 12 Jan 2026 15:30:36 +0800 Fushuai Wang [off-list ref] wrote:
From: Fushuai Wang <redacted> Use copy_from_user_nul() instead of copy_from_user() to simplify the code. No functional change. Signed-off-by: Fushuai Wang <redacted>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> -- Steve
quoted hunk ↗ jump to hunk
--- 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');