Re: [PATCH] dmaengine: qcom_hidma: avoid freeing an uninitialized pointer

[Sinan Kaya <okaya@codeaurora.org>]

On 8/10/2017 11:54 AM, Anton Vasilyev wrote:
> If device_node np doesn't contain child or first child doesn't have
> property "reg" then hidma_mgmt_of_populate_channels() perfoms
> deallocation on uninitialized local variable res.
> 
> The patch adds res initialization by NULL.
> 
> Found by Linux Driver Verification project (linuxtesting.org).
> 
> Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
> ---
>  drivers/dma/qcom/hidma_mgmt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/qcom/hidma_mgmt.c b/drivers/dma/qcom/hidma_mgmt.c
> index 5a0991b..89e36e3 100644
> --- a/drivers/dma/qcom/hidma_mgmt.c
> +++ b/drivers/dma/qcom/hidma_mgmt.c
> @@ -354,7 +354,7 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
>  	struct platform_device_info pdevinfo;
>  	struct of_phandle_args out_irq;
>  	struct device_node *child;
> -	struct resource *res;
> +	struct resource *res = NULL;
>  	const __be32 *cell;
>  	int ret = 0, size, i, num;
>  	u64 addr, addr_size;
> 

Reviewed-by: Sinan Kaya <okaya@codeaurora.org>

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.