linux-kernel - [PATCH 1/1] perf tools: avoid null pointer dereference

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Message-Id: <1465659636-10290-1-git-send-email-xypron.glpk@gmx.de>
Date:	Sat, 11 Jun 2016 17:40:36 +0200
From:	Heinrich Schuchardt <xypron.glpk@....de>
To:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 1/1] perf tools: avoid null pointer dereference

If ttrace is NULL we should not dereference it.
Strangely enough this is done for one component and not for the other.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
---
 tools/perf/builtin-trace.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 5c50fe7..de18d2d 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -862,10 +862,10 @@ static struct thread_trace *thread_trace__new(void)
 {
 	struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
 
-	if (ttrace)
+	if (ttrace) {
 		ttrace->paths.max = -1;
-
-	ttrace->syscall_stats = intlist__new(NULL);
+		ttrace->syscall_stats = intlist__new(NULL);
+	}
 
 	return ttrace;
 }
-- 
2.1.4