[PATCH] perf trace: Ensure read cmdlines are null terminated.

[Ian Rogers]

Issue detected by address sanitizer.

Fixes: cd4ceb63438e (perf util: Save pid-cmdline mapping into tracing header)
Signed-off-by: Ian Rogers <irog...@google.com>
---
 tools/perf/util/trace-event-read.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/trace-event-read.c 
b/tools/perf/util/trace-event-read.c
index f507dff713c9..8a01af783310 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -361,6 +361,7 @@ static int read_saved_cmdline(struct tep_handle *pevent)
                pr_debug("error reading saved cmdlines\n");
                goto out;
        }
+       buf[ret] = '\0';
 
        parse_saved_cmdline(pevent, buf, size);
        ret = 0;
-- 
2.30.1.766.gb4fecdf3b7-goog