[PATCH] tracing: Consider the NULL character when validating the event length

[Leo Yan]

strlen() returns a string length excluding the null byte. This commit
adds 1 to account for the NULL terminating character when checking if an
event string is within the maximum length.

Fixes: dec65d79fd26 ("tracing/probe: Check event name length correctly")
Signed-off-by: Leo Yan <leo....@arm.com>
---
 kernel/trace/trace_probe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 39877c80d6cb..376ba56c3680 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -276,7 +276,7 @@ int traceprobe_parse_event_name(const char **pevent, const 
char **pgroup,
                }
                trace_probe_log_err(offset, NO_EVENT_NAME);
                return -EINVAL;
-       } else if (len > MAX_EVENT_NAME_LEN) {
+       } else if (len + 1 > MAX_EVENT_NAME_LEN) {
                trace_probe_log_err(offset, EVENT_TOO_LONG);
                return -EINVAL;
        }
-- 
2.34.1