From: Cong Wang <xiyou.wangc...@gmail.com>
Date: Fri, 24 Jul 2020 09:45:51 -0700
> We have to detach sock from socket in qrtr_release(),
> otherwise skb->sk may still reference to this socket
> when the skb is released in tun->queue, particularly
> sk->sk_wq still points to &sock->wq, which leads to
> a UAF.
>
> Reported-and-tested-by: syzbot+6720d64f31c081c2f...@syzkaller.appspotmail.com
> Fixes: 28fb4e59a47d ("net: qrtr: Expose tunneling endpoint to user space")
> Cc: Bjorn Andersson <bjorn.anders...@linaro.org>
> Cc: Eric Dumazet <eric.duma...@gmail.com>
> Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
Applied and queued up for -stable, thanks.
