[tip:perf/core] perf tools: Fix possible double free on error

[tip-bot for Thomas Jarosch]

Commit-ID:  68c465ada54c730d653fc6fdc9dc0d5270b2de00
Gitweb:     http://git.kernel.org/tip/68c465ada54c730d653fc6fdc9dc0d5270b2de00
Author:     Thomas Jarosch <thomas.jarosch@xxxxxxxxxxxxx>
AuthorDate: Fri, 25 Jan 2013 10:57:08 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 30 Jan 2013 10:37:41 -0300

perf tools: Fix possible double free on error

Can only be triggered via CROSS_COMPILE env var.

Detected by cppcheck.

Signed-off-by: Thomas Jarosch <thomas.jarosch@xxxxxxxxxxxxx>
Link: 36736865.AIlztKhDqN@storm">http://lkml.kernel.org/r/36736865.AIlztKhDqN@storm
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/arch/common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/arch/common.c b/tools/perf/arch/common.c
index 3e975cb..aacef07 100644
--- a/tools/perf/arch/common.c
+++ b/tools/perf/arch/common.c
@@ -155,6 +155,7 @@ static int perf_session_env__lookup_binutils_path(struct perf_session_env *env,
 		if (lookup_path(buf))
 			goto out;
 		free(buf);
+		buf = NULL;
 	}
 
 	if (!strcmp(arch, "arm"))
--
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