linux-kernel - [PATCH] tools: perf: builtin-trace.c: Cleaning up inconsistent NULL checks

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Message-Id: <1400795816-12483-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Thu, 22 May 2014 23:56:56 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] tools: perf: builtin-trace.c:  Cleaning up inconsistent NULL checks

Cleaning up inconsistent NULL checks.
There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 tools/perf/builtin-trace.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index f954c26..130063a 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1146,8 +1146,10 @@ static struct thread_trace *thread_trace__new(void)
 {
 	struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
 
-	if (ttrace)
-		ttrace->paths.max = -1;
+	if (!ttrace)
+		return NULL;
+
+	ttrace->paths.max = -1;
 
 	ttrace->syscall_stats = intlist__new(NULL);
 
-- 
1.7.10.4

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