On 5 March 2018 at 13:08, SF Markus Elfring
<elfring@xxxxxxxxxxxxxxxxxxxxx> wrote:
> From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> Date: Mon, 5 Mar 2018 11:33:21 +0100
>
> Reuse existing functionality from memdup_user() instead of keeping
> duplicate source code.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Thanks, applied for next!
Kind regards
Uffe
> ---
> drivers/mmc/core/block.c | 15 ++++-----------
> 1 file changed, 4 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> index 20135a5de748..4b09c7380e70 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -375,22 +375,15 @@ static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
> return idata;
> }
>
> - idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
> - if (!idata->buf) {
> - err = -ENOMEM;
> + idata->buf = memdup_user((void __user *)(unsigned long)
> + idata->ic.data_ptr, idata->buf_bytes);
> + if (IS_ERR(idata->buf)) {
> + err = PTR_ERR(idata->buf);
> goto idata_err;
> }
>
> - if (copy_from_user(idata->buf, (void __user *)(unsigned long)
> - idata->ic.data_ptr, idata->buf_bytes)) {
> - err = -EFAULT;
> - goto copy_err;
> - }
> -
> return idata;
>
> -copy_err:
> - kfree(idata->buf);
> idata_err:
> kfree(idata);
> out:
> --
> 2.16.2
>
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