linux-kernel - Re: [PATCH -next] pinctrl: sunxi: fix 'pctrl->functions' allocation in sunxi_pinctrl_build

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] [day] [month] [year] [list]

Date:   Fri, 21 Sep 2018 09:18:22 -0700
From:   Linus Walleij <linus.walleij@...aro.org>
To:     yuehaibing@...wei.com
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH -next] pinctrl: sunxi: fix 'pctrl->functions' allocation
 in sunxi_pinctrl_build_state

On Thu, Sep 20, 2018 at 7:00 PM YueHaibing <yuehaibing@...wei.com> wrote:

> fixes following Smatch static check warning:
>
>  ./drivers/pinctrl/sunxi/pinctrl-sunxi.c:1112 sunxi_pinctrl_build_state()
>  warn: passing devm_ allocated variable to kfree. 'pctrl->functions'
>
> As we will be calling krealloc() on pointer 'pctrl->functions', which means
> kfree() will be called in there, devm_kzalloc() shouldn't be used with
> the allocation in the first place.  Fix the warning by calling kcalloc()
> and managing the free procedure in error path on our own.
>
> Fixes: 0e37f88d9ad8 ("ARM: sunxi: Add pinctrl driver for Allwinner SoCs")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Patch applied with Maxime's ACK.

Yours,
Linus Walleij