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-rw-r--r--fs/sysfs/dir.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e6bb9b2a4cbe..c0bf38a21caa 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -307,6 +307,7 @@ static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
{
struct sysfs_dirent *sd;
int is_dir;
+ int type;
if (nd->flags & LOOKUP_RCU)
return -ECHILD;
@@ -326,6 +327,13 @@ static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
if (strcmp(dentry->d_name.name, sd->s_name) != 0)
goto out_bad;
+ /* The sysfs dirent has been moved to a different namespace */
+ type = KOBJ_NS_TYPE_NONE;
+ 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;
+
mutex_unlock(&sysfs_mutex);
out_valid:
return 1;