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Date:   Fri, 24 Jul 2020 17:31:27 -0700 (PDT)
From:   David Miller <>
Subject: Re: [Patch net v2] qrtr: orphan socket in qrtr_release()

From: Cong Wang <>
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:
> Fixes: 28fb4e59a47d ("net: qrtr: Expose tunneling endpoint to user space")
> Cc: Bjorn Andersson <>
> Cc: Eric Dumazet <>
> Signed-off-by: Cong Wang <>

Applied and queued up for -stable, thanks.

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