cgroups: save space for the terminator
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>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Reviewd-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Ben Blum <bblum@andrew.cmu.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index d83cab0..192f88c 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1102,7 +1102,7 @@
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 @@
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;