Hello Uwe,
I was to quick to resend the patch, sorry.
On Sat, May 17, 2014 at 09:18:21PM +0200, Uwe Kleine-König wrote:
> Hello Emil,
>
> On Sat, May 17, 2014 at 08:40:33PM +0200, Emil Goode wrote:
> > If we fail to allocate struct platform_device pdev we
> > dereference it after the goto label err.
> >
> > I have rearranged the error handling a bit to fix the issue
> > and also make it more clear.
> >
> > Signed-off-by: Emil Goode <emilgoode@xxxxxxxxx>
> > ---
> > v3: Made subject line more specific.
> > v2: Changed to return -ENOMEM instead of ret where possible and
> > updated the subject line.
> >
> > arch/arm/mach-imx/devices/platform-ipu-core.c | 22 +++++++++++++---------
> > 1 file changed, 13 insertions(+), 9 deletions(-)
> Considering that you can fix the issue also by just doing:
>
> diff --git a/arch/arm/mach-imx/devices/platform-ipu-core.c b/arch/arm/mach-imx/devices/platform-ipu-core.c
> index fc4dd7cedc11..6bd7c3f37ac0 100644
> --- a/arch/arm/mach-imx/devices/platform-ipu-core.c
> +++ b/arch/arm/mach-imx/devices/platform-ipu-core.c
> @@ -77,7 +77,7 @@ struct platform_device *__init imx_alloc_mx3_camera(
>
> pdev = platform_device_alloc("mx3-camera", 0);
> if (!pdev)
> - goto err;
> + return ERR_PTR(-ENOMEM);
>
> pdev->dev.dma_mask = kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
> if (!pdev->dev.dma_mask)
>
> or
>
> diff --git a/arch/arm/mach-imx/devices/platform-ipu-core.c b/arch/arm/mach-imx/devices/platform-ipu-core.c
> index fc4dd7cedc11..c609f3667200 100644
> --- a/arch/arm/mach-imx/devices/platform-ipu-core.c
> +++ b/arch/arm/mach-imx/devices/platform-ipu-core.c
> @@ -96,7 +96,8 @@ struct platform_device *__init imx_alloc_mx3_camera(
> ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
> if (ret) {
> err:
> - kfree(pdev->dev.dma_mask);
> + if (pdev)
> + kfree(pdev->dev.dma_mask);
> platform_device_put(pdev);
> return ERR_PTR(-ENODEV);
> }
>
> I would prefer one of them as it is easier to justify and for the next
> cycle convert the function to platform_device_register_full.
Agreed, that makes sense considering the second patch that would convert to
platform_device_register_full().
>
> Also you should point out in the commit log that the issue was found by
> coccinelle.
Ok, will do that.
Thank you!
Best regards,
Emil Goode
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