From: Dan Carpenter <error27@gmail.com>
To: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Ben Blum <bblum@andrew.cmu.edu>,
containers@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] cgroups: save space for the terminator
Date: Sat, 10 Jul 2010 10:54:29 +0000 [thread overview]
Message-ID: <20100710105429.GW19184@bicker> (raw)
The original code didn't leave enough space for a NULL terminator.
These strings are copied with strcpy() into fixed length buffers in
cgroup_root_from_opts().
Signed-off-by: Dan Carpenter <error27@gmail.com>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 3ac6f5b..a942820 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1102,7 +1102,7 @@ static int parse_cgroupfs_options(char *data, struct cgroup_sb_opts *opts)
if (opts->release_agent)
return -EINVAL;
opts->release_agent - kstrndup(token + 14, PATH_MAX, GFP_KERNEL);
+ kstrndup(token + 14, PATH_MAX - 1, GFP_KERNEL);
if (!opts->release_agent)
return -ENOMEM;
} else if (!strncmp(token, "name=", 5)) {
@@ -1123,7 +1123,7 @@ static int parse_cgroupfs_options(char *data, struct cgroup_sb_opts *opts)
if (opts->name)
return -EINVAL;
opts->name = kstrndup(name,
- MAX_CGROUP_ROOT_NAMELEN,
+ MAX_CGROUP_ROOT_NAMELEN - 1,
GFP_KERNEL);
if (!opts->name)
return -ENOMEM;
next reply other threads:[~2010-07-10 10:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-10 10:54 Dan Carpenter [this message]
2010-07-12 0:10 ` [patch] cgroups: save space for the terminator Serge E. Hallyn
2010-07-12 0:23 ` KAMEZAWA Hiroyuki
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