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

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Date:   Wed, 21 Sep 2022 09:33:35 +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, irogers@...gle.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        ye xingchen <ye.xingchen@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH linux-next] perf parse-events: 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/print-events.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/print-events.c b/tools/perf/util/print-events.c
index ba1ab5134685..36c242ea6314 100644
--- a/tools/perf/util/print-events.c
+++ b/tools/perf/util/print-events.c
@@ -430,7 +430,7 @@ static void print_tool_event(const struct event_symbol *syms, const char *event_
 		if (syms->alias && strlen(syms->alias))
 			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
 		else
-			strlcpy(name, syms->symbol, MAX_NAME_LEN);
+			strscpy(name, syms->symbol, MAX_NAME_LEN);
 		printf("  %-50s [%s]\n", name, "Tool event");
 	}
 }
@@ -485,7 +485,7 @@ void print_symbol_events(const char *event_glob, unsigned int type,
 		if (!name_only && strlen(syms->alias))
 			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
 		else
-			strlcpy(name, syms->symbol, MAX_NAME_LEN);
+			strscpy(name, syms->symbol, MAX_NAME_LEN);
 
 		evt_list[evt_i] = strdup(name);
 		if (evt_list[evt_i] == NULL)
-- 
2.25.1