netdev - Re: [PATCH 05/18] net, bluetooth: convert rfcomm_dlc.refcnt from atomic_t to refcount

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Date:   Mon, 27 Mar 2017 16:05:34 +0200
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Elena Reshetova <elena.reshetova@...el.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-decnet-user@...ts.sourceforge.net,
        "David S. Miller" <davem@...emloft.net>,
        James Morris <jmorris@...ei.org>,
        Patrick McHardy <kaber@...sh.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>, 3chas3@...il.com,
        ralf@...ux-mips.org, stephen@...workplumber.org,
        jchapman@...alix.com, jhs@...atatu.com,
        bridge@...ts.linux-foundation.org, linux-hams@...r.kernel.org,
        linux-x25@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        Johan Hedberg <johan.hedberg@...il.com>, peterz@...radead.org,
        keescook@...omium.org, Hans Liljestrand <ishkamiel@...il.com>,
        David Windsor <dwindsor@...il.com>
Subject: Re: [PATCH 05/18] net, bluetooth: convert rfcomm_dlc.refcnt from
 atomic_t to refcount_t

Hi Elena,

> refcount_t type and corresponding API should be
> used instead of atomic_t when the variable is used as
> a reference counter. This allows to avoid accidental
> refcounter overflows that might lead to use-after-free
> situations.
> 
> Signed-off-by: Elena Reshetova <elena.reshetova@...el.com>
> Signed-off-by: Hans Liljestrand <ishkamiel@...il.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: David Windsor <dwindsor@...il.com>
> ---
> include/net/bluetooth/rfcomm.h | 8 +++++---
> net/bluetooth/rfcomm/core.c    | 4 ++--
> 2 files changed, 7 insertions(+), 5 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel