linux-kernel - Re: [PATCH] net/ipv6: Convert from atomic_t to refcount_t on ip6

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Message-ID: <f7d3dee7-5c35-a780-93df-ba0cdb7a2215@gmail.com>
Date:   Tue, 20 Jul 2021 13:55:47 -0600
From:   David Ahern <dsahern@...il.com>
To:     Xiyu Yang <xiyuyang19@...an.edu.cn>,
        "David S. Miller" <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-actions@...ts.infradead.org
Cc:     yuanxzhang@...an.edu.cn, Xin Tan <tanxin.ctf@...il.com>
Subject: Re: [PATCH] net/ipv6: Convert from atomic_t to refcount_t on
 ip6_flowlabel->users

On 7/19/21 2:35 AM, Xiyu Yang wrote:
> refcount_t type and corresponding API can protect refcounters from
> accidental underflow and overflow and further use-after-free situations.
> 
> Signed-off-by: Xiyu Yang <xiyuyang19@...an.edu.cn>
> Signed-off-by: Xin Tan <tanxin.ctf@...il.com>
> ---
>  include/net/ipv6.h       |  5 +++--
>  net/ipv6/ip6_flowlabel.c | 18 +++++++++---------
>  2 files changed, 12 insertions(+), 11 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>