Re: [PATCH v3] staging: rtlwifi: Fix potential NULL pointer dereference of kzalloc

[Mukesh Ojha]

On 3/20/2019 9:12 PM, Aditya Pakki wrote:
> phydm.internal is allocated using kzalloc which is used multiple
> times without a check for NULL pointer. This patch avoids such a
> scenario by returning 0, consistent with the failure case.
>
> Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>
>
> ---
> v2: Move the signed off line above
> v1: Patch collision with different things, fix as per Greg
> ---
>   drivers/staging/rtlwifi/phydm/rtl_phydm.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/staging/rtlwifi/phydm/rtl_phydm.c b/drivers/staging/rtlwifi/phydm/rtl_phydm.c
> index 9930ed954abb..4cc77b2016e1 100644
> --- a/drivers/staging/rtlwifi/phydm/rtl_phydm.c
> +++ b/drivers/staging/rtlwifi/phydm/rtl_phydm.c
> @@ -180,6 +180,8 @@ static int rtl_phydm_init_priv(struct rtl_priv *rtlpriv,
>   
>   	rtlpriv->phydm.internal =
>   		kzalloc(sizeof(struct phy_dm_struct), GFP_KERNEL);
> +	if (!rtlpriv->phydm.internal)
> +		return 0;
>   
>   	_rtl_phydm_init_com_info(rtlpriv, ic, params);
>   



Reviewed-by:Â Mukesh Ojha <mojha@xxxxxxxxxxxxxx>

Thanks,
Mukesh