hi,
the following patch rejects '\n' in a cgroup name.
otherwise /proc/$$/cgroup is not parsable.
example:
imawoto% cat /proc/$$/cgroup
memory:/
imawoto% mkdir -p "
memory:/foo"
imawoto% echo $$ >| "
memory:/foo/tasks"
imawoto% cat /proc/$$/cgroup
memory:/
memory:/foo
imawoto%
YAMAMOTO Takashi
Signed-off-by: YAMAMOTO Takashi <[EMAIL PROTECTED]>
---
--- linux-2.6.24-rc8-mm1/kernel/cgroup.c.BACKUP 2008-01-23 14:43:29.000000000
+0900
+++ linux-2.6.24-rc8-mm1/kernel/cgroup.c 2008-01-24 13:56:28.000000000
+0900
@@ -2216,6 +2216,10 @@ static long cgroup_create(struct cgroup
struct cgroup_subsys *ss;
struct super_block *sb = root->sb;
+ /* reject a newline. otherwise /proc/$$/cgroup is not parsable. */
+ if (strchr(dentry->d_name.name, '\n'))
+ return -EINVAL;
+
cgrp = kzalloc(sizeof(*cgrp), GFP_KERNEL);
if (!cgrp)
return -ENOMEM;
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