diff options
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index a4fdad475594..18656c4094b3 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -856,10 +856,6 @@ static int tun_attach(struct tun_struct *tun, struct file *file, err = 0; } - rcu_assign_pointer(tfile->tun, tun); - rcu_assign_pointer(tun->tfiles[tun->numqueues], tfile); - tun->numqueues++; - if (tfile->detached) { tun_enable_queue(tfile); } else { @@ -876,6 +872,13 @@ static int tun_attach(struct tun_struct *tun, struct file *file, * refcnt. */ + /* Publish tfile->tun and tun->tfiles only after we've fully + * initialized tfile; otherwise we risk using half-initialized + * object. + */ + rcu_assign_pointer(tfile->tun, tun); + rcu_assign_pointer(tun->tfiles[tun->numqueues], tfile); + tun->numqueues++; out: return err; } |