linux-kernel - Re: [PATCH 1/5] net: dsa: fix a leaked reference by adding a missing of_node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CACRpkdYwkNrLk-GuV7gaOKYFOeBd0=DLN1wsgrYxeXOHuwtz+A@mail.gmail.com>
Date:   Fri, 22 Feb 2019 11:38:53 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Wen Yang <wen.yang99@....com.cn>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Felix Fietkau <nbd@....name>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>, anirudh@...inx.com,
        John Linn <John.Linn@...inx.com>,
        Michal Simek <michal.simek@...inx.com>, wang.yi59@....com.cn
Subject: Re: [PATCH 1/5] net: dsa: fix a leaked reference by adding a missing of_node_put

On Fri, Feb 22, 2019 at 8:15 AM Wen Yang <wen.yang99@....com.cn> wrote:

> The call to of_get_child_by_name returns a node pointer with refcount
> incremented thus it must be explicitly decremented after the last
> usage.
>
> Detected by coccinelle with the following warnings:
> ./drivers/net/dsa/rtl8366rb.c:510:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 501, but without a corresponding object release within this function.
> ./drivers/net/dsa/rtl8366rb.c:518:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 501, but without a corresponding object release within this function.
> ./drivers/net/dsa/rtl8366rb.c:540:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 501, but without a corresponding object release within this function.
> ./drivers/net/dsa/rtl8366rb.c:548:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 501, but without a corresponding object release within this function.
> ./drivers/net/dsa/rtl8366rb.c:556:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 501, but without a corresponding object release within this function.
> ./drivers/net/dsa/rtl8366rb.c:561:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 501, but without a corresponding object release within this function.
>
> Signed-off-by: Wen Yang <wen.yang99@....com.cn>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Andrew Lunn <andrew@...n.ch>
> Cc: Vivien Didelot <vivien.didelot@...il.com>
> Cc: Florian Fainelli <f.fainelli@...il.com>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij