diff options
| author | Andrew Morton <akpm@linux-foundation.org> | 2012-07-10 01:13:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-17 18:43:55 +0200 |
| commit | 17f79be93d95bb0e46bd08681ec9c9e601869c15 (patch) | |
| tree | ec9ab980fdd6ef43654668f6d4524f236de1bcc2 /fs/sysfs/dir.c | |
| parent | sysfs: fail dentry revalidation after namespace change (diff) | |
| download | linux-17f79be93d95bb0e46bd08681ec9c9e601869c15.tar.xz linux-17f79be93d95bb0e46bd08681ec9c9e601869c15.zip | |
sysfs: fail dentry revalidation after namespace change fix
don't assume that KOBJ_NS_TYPE_NONE==0. Also save a test-n-branch.
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs/dir.c')
| -rw-r--r-- | fs/sysfs/dir.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index c0bf38a21caa..1cdfb53199aa 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -329,10 +329,12 @@ static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd) /* The sysfs dirent has been moved to a different namespace */ type = KOBJ_NS_TYPE_NONE; - if (sd->s_parent) + if (sd->s_parent) { type = sysfs_ns_type(sd->s_parent); - if (type && (sysfs_info(dentry->d_sb)->ns[type] != sd->s_ns)) - goto out_bad; + if (type != KOBJ_NS_TYPE_NONE && + sysfs_info(dentry->d_sb)->ns[type] != sd->s_ns) + goto out_bad; + } mutex_unlock(&sysfs_mutex); out_valid: |