linux-kernel - [PATCH 36/74] perf tools: Fix possible (unlikely) buffer overflow

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Message-Id: <1359058103-31645-37-git-send-email-acme@infradead.org>
Date:	Thu, 24 Jan 2013 17:07:45 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Thomas Jarosch <thomas.jarosch@...ra2net.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 36/74] perf tools: Fix possible (unlikely) buffer overflow

From: Thomas Jarosch <thomas.jarosch@...ra2net.com>

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)
 {
-- 
1.8.1.1.361.gec3ae6e

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