linux-kernel - [PATCH] trace-cmd: trace-cmd.c call free only once on tracing and path

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Date:	Thu, 3 Dec 2015 23:34:13 +0100 (CET)
From:	John Kacur <jkacur@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] trace-cmd: trace-cmd.c call free only once on tracing and
 path

>From 33102b6423ba64798d91aee9de4ecb21189dd49e Mon Sep 17 00:00:00 2001
From: John Kacur <jkacur@...hat.com>
Date: Thu, 3 Dec 2015 23:29:05 +0100
Subject: [PATCH] trace-cmd: don't call free on tracing and path more than once

In version trace-cmd-stable-v2.2 it is possible to call free on
tracing and path more than once.

Ensure this only happens once by moving this block to after the call
to out_free

Signed-off-by: John Kacur <jkacur@...hat.com>
---
 trace-recorder.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/trace-recorder.c b/trace-recorder.c
index 540765bc9c65..cfdc45e053ab 100644
--- a/trace-recorder.c
+++ b/trace-recorder.c
@@ -97,15 +97,15 @@ struct tracecmd_recorder *tracecmd_create_recorder_fd(int fd, int cpu, unsigned
 	if (recorder->trace_fd < 0)
 		goto out_free;
 
-	free(tracing);
-	free(path);
-
 	if ((recorder->flags & TRACECMD_RECORD_NOSPLICE) == 0) {
 		ret = pipe(recorder->brass);
 		if (ret < 0)
 			goto out_free;
 	}
 
+	free(tracing);
+	free(path);
+
 	return recorder;
 
  out_free:
-- 
2.4.3

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