linux-kernel - Re: [PATCH v2 02/17] iio: accel: mma9553: check input value for activity period

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: <553D31EF.40909@kernel.org>
Date:	Sun, 26 Apr 2015 19:43:59 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Irina Tirdea <irina.tirdea@...el.com>, linux-iio@...r.kernel.org,
	Hartmut Knaack <knaack.h@....de>
CC:	linux-kernel@...r.kernel.org, Vlad Dogaru <vlad.dogaru@...el.com>
Subject: Re: [PATCH v2 02/17] iio: accel: mma9553: check input value for activity
 period

On 13/04/15 16:40, Irina Tirdea wrote:
> When setting the activity period, the value introduced by
> the user in sysfs is not checked for validity.
> 
> Add a boundary check so that only allowed values are
> reported as successfully written to device.
> 
> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
> Reported-by: Hartmut Knaack <knaack.h@....de>
hmm.  Not that critical as it just gives miss information to
userspace that is writing an incorrect value.  Still it's small
so I've taken it in the fixes-togreg branch.

Thanks,

Jonathan
> ---
>  drivers/iio/accel/mma9553.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
> index 607dbfc..03120fb 100644
> --- a/drivers/iio/accel/mma9553.c
> +++ b/drivers/iio/accel/mma9553.c
> @@ -54,6 +54,7 @@
>  #define MMA9553_MASK_CONF_STEPCOALESCE		GENMASK(7, 0)
>  
>  #define MMA9553_REG_CONF_ACTTHD			0x0E
> +#define MMA9553_MAX_ACTTHD			GENMASK(15, 0)
>  
>  /* Pedometer status registers (R-only) */
>  #define MMA9553_REG_STATUS			0x00
> @@ -869,6 +870,9 @@ static int mma9553_write_event_value(struct iio_dev *indio_dev,
>  	case IIO_EV_INFO_PERIOD:
>  		switch (chan->type) {
>  		case IIO_ACTIVITY:
> +			if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
> +			    MMA9553_MAX_ACTTHD))
> +				return -EINVAL;
>  			mutex_lock(&data->mutex);
>  			ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
>  						 &data->conf.actthd,
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/