From: Fushuai Wang <fushuai.wang@linux.dev>
To: tglx@kernel.org, peterz@infradead.org,
mathieu.desnoyers@efficios.com, akpm@linux-foundation.org,
aliceryhl@google.com, yury.norov@gmail.com, vmalik@redhat.com,
kees@kernel.org, dave.hansen@linux.intel.com, luto@kernel.org,
mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
rostedt@goodmis.org, mhiramat@kernel.org, brauner@kernel.org,
jack@suse.cz, cyphar@cyphar.com
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
linux-trace-kernel@vger.kernel.org, wangfushuai@baidu.com
Subject: [PATCH v2 3/6] tracing: Use copy_from_user_nul() instead of copy_from_user()
Date: Mon, 12 Jan 2026 15:30:36 +0800 [thread overview]
Message-ID: <20260112073039.1185-4-fushuai.wang@linux.dev> (raw)
In-Reply-To: <20260112073039.1185-1-fushuai.wang@linux.dev>
From: Fushuai Wang <wangfushuai@baidu.com>
Use copy_from_user_nul() instead of copy_from_user() to simplify
the code.
No functional change.
Signed-off-by: Fushuai Wang <wangfushuai@baidu.com>
---
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
next prev parent reply other threads:[~2026-01-12 7:32 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-12 7:30 [PATCH v2 0/6] uaccess: Introduce copy_from_user_nul helper Fushuai Wang
2026-01-12 7:30 ` [PATCH v2 1/6] uaccess: Add " Fushuai Wang
2026-01-12 9:23 ` Alice Ryhl
2026-01-12 10:00 ` Fushuai Wang
2026-01-12 11:20 ` Alice Ryhl
2026-01-12 12:22 ` Fushuai Wang
2026-01-12 13:22 ` Borislav Petkov
2026-01-12 15:40 ` Alice Ryhl
2026-01-12 16:28 ` Steven Rostedt
2026-01-12 16:37 ` Alice Ryhl
2026-01-13 18:00 ` Yury Norov
2026-01-13 18:17 ` Yury Norov
2026-01-16 8:42 ` Fushuai Wang
2026-01-12 7:30 ` [PATCH v2 2/6] x86/tlb: Use copy_from_user_nul() instead of copy_from_user() Fushuai Wang
2026-01-12 7:30 ` Fushuai Wang [this message]
2026-01-12 15:43 ` [PATCH v2 3/6] tracing: " Steven Rostedt
2026-01-13 17:05 ` Yury Norov
2026-01-13 18:03 ` Steven Rostedt
2026-01-12 7:30 ` [PATCH v2 4/6] userns: " Fushuai Wang
2026-01-12 7:30 ` [PATCH v2 5/6] time: " Fushuai Wang
2026-01-12 7:30 ` [PATCH v2 6/6] kstrtox: " Fushuai Wang
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