linux-kernel - [perf PATCH] Fix possible (unlikely) buffer overflow

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Message-ID: <50D9D30B.8090002@intra2net.com>
Date:	Tue, 25 Dec 2012 17:23:39 +0100
From:	Thomas Jarosch <thomas.jarosch@...ra2net.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	linux-kernel@...r.kernel.org
Subject: [perf PATCH] 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>
---
 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..606f884 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)
 {
-- 
1.7.11.7

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