linux-kernel - [tip:perf/core] perf tools: Fix possible (unlikely) buffer overflow

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Message-ID: <tip-a65c23420668f7112395abf9c6f22c6450567bf0@git.kernel.org>
Date:	Fri, 25 Jan 2013 03:30:35 -0800
From:	tip-bot for Thomas Jarosch <thomas.jarosch@...ra2net.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...nel.org, thomas.jarosch@...ra2net.com, tglx@...utronix.de
Subject: [tip:perf/core] perf tools: Fix possible (unlikely)
  buffer overflow

Commit-ID:  a65c23420668f7112395abf9c6f22c6450567bf0
Gitweb:     http://git.kernel.org/tip/a65c23420668f7112395abf9c6f22c6450567bf0
Author:     Thomas Jarosch <thomas.jarosch@...ra2net.com>
AuthorDate: Tue, 25 Dec 2012 17:23:39 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 24 Jan 2013 16:40:18 -0300

perf tools: Fix possible (unlikely) buffer overflow

cppcheck reported:
[tools/perf/util/sysfs.c:50]: (error) Width 4096 given in format string
(no. 1) is larger than destination buffer 'sysfs_mountpoint[4096]',
use %4095s to prevent overflowing it

-> All other places in the kernel that use STR(PATH_MAX)
   have a buffer size of PATH_MAX + 1.

Signed-off-by: Thomas Jarosch <thomas.jarosch@...ra2net.com>
Link: http://lkml.kernel.org/r/50D9D30B.8090002@intra2net.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/sysfs.c b/tools/perf/util/sysfs.c
index 48c6902..f71e9ea 100644
--- a/tools/perf/util/sysfs.c
+++ b/tools/perf/util/sysfs.c
@@ -8,7 +8,7 @@ static const char * const sysfs_known_mountpoints[] = {
 };
 
 static int sysfs_found;
-char sysfs_mountpoint[PATH_MAX];
+char sysfs_mountpoint[PATH_MAX + 1];
 
 static int sysfs_valid_mountpoint(const char *sysfs)
 {
--
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