linux-kernel - [PATCH linux-next] perf llvm: use strscpy() is more robust and safer

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Date:   Thu, 22 Sep 2022 01:31:43 +0000
From:   cgel.zte@...il.com
To:     acme@...nel.org
Cc:     mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, nathan@...nel.org, ndesaulniers@...gle.com,
        trix@...hat.com, andrii@...nel.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, ye xingchen <ye.xingchen@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH linux-next] perf llvm: use strscpy() is more robust and safer

From: ye xingchen <ye.xingchen@....com.cn>

The implementation of strscpy() is more robust and safer.

That's now the recommended way to copy NUL terminated strings.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: ye xingchen <ye.xingchen@....com.cn>
---
 tools/perf/util/llvm-utils.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index 2dc797007419..3e218cb8f0ae 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -80,7 +80,7 @@ search_program(const char *def, const char *name,
 	if (def && def[0] != '\0') {
 		if (def[0] == '/') {
 			if (access(def, F_OK) == 0) {
-				strlcpy(output, def, PATH_MAX);
+				strscpy(output, def, PATH_MAX);
 				return 0;
 			}
 		} else if (def[0] != '\0')
@@ -99,7 +99,7 @@ search_program(const char *def, const char *name,
 	while (path) {
 		scnprintf(buf, sizeof(buf), "%s/%s", path, name);
 		if (access(buf, F_OK) == 0) {
-			strlcpy(output, buf, PATH_MAX);
+			strscpy(output, buf, PATH_MAX);
 			ret = 0;
 			break;
 		}
-- 
2.25.1