perf: Fix strncpy() use, use strlcpy() instead of strncpy()

For NUL terminated string we always need to set '\0' at the end.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Cc: rostedt@goodmis.org
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/51624254.30301@asianux.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 4f1dade..3f5046a 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -132,7 +132,7 @@ static char *default_bootup_tracer;
 
 static int __init set_cmdline_ftrace(char *str)
 {
-       strncpy(bootup_tracer_buf, str, MAX_TRACER_SIZE);
+       strlcpy(bootup_tracer_buf, str, MAX_TRACER_SIZE);
        default_bootup_tracer = bootup_tracer_buf;
        /* We are using ftrace early, expand it */
        ring_buffer_expanded = 1;
@@ -162,7 +162,7 @@ static char *trace_boot_options __initdata;
 
 static int __init set_trace_boot_options(char *str)
 {
-       strncpy(trace_boot_options_buf, str, MAX_TRACER_SIZE);
+       strlcpy(trace_boot_options_buf, str, MAX_TRACER_SIZE);
        trace_boot_options = trace_boot_options_buf;
        return 0;
 }