linux-kernel - Re: [PATCH 2/4] iio: imu: add Bosch Sensortec BNO055 core driver

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: <CAN8YU5MFMqh3wZo-yOOE8och3x089kYWjtrr83Jt8wCQTKFE8Q@mail.gmail.com>
Date:   Mon, 19 Jul 2021 11:02:07 +0200
From:   Andrea Merello <andrea.merello@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matt Ranostay <matt.ranostay@...sulko.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        vlad.dogaru@...el.com, linux-kernel <linux-kernel@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        Andrea Merello <andrea.merello@....it>
Subject: Re: [PATCH 2/4] iio: imu: add Bosch Sensortec BNO055 core driver

Il giorno gio 15 lug 2021 alle ore 18:50 Andy Shevchenko
<andy.shevchenko@...il.com> ha scritto:

>
> > +/* must be called in configuration mode */
> > +int bno055_calibration_load(struct bno055_priv *priv, const struct firmware *fw)
> > +{
> > +       int i;
> > +       unsigned int tmp;
> > +       u8 cal[BNO055_CALDATA_LEN];
> > +       int read, tot_read = 0;
> > +       int ret = 0;
> > +       char *buf = kmalloc(fw->size + 1, GFP_KERNEL);
> > +
> > +       if (!buf)
> > +               return -ENOMEM;
> > +
> > +       memcpy(buf, fw->data, fw->size);
>
> kmemdup() ?
>

As a second thought: no, the whole point of reallocating and copying
here, is that we want to allocate an extra byte; kmemdup() will
allocate and copy only the very same amount of memory