[PATCH v3] staging: rtlwifi: rtl8822b: fix to avoid NULL pointer dereference

[Mukesh Ojha]

On 3/20/2019 10:32 PM, Aditya Pakki wrote:
> skb allocated via dev_alloc_skb can fail and return a NULL pointer.
> This patch avoids such a scenario and returns, consistent with other
> invocations.
>
> Signed-off-by: Aditya Pakki <pakki001 at umn.edu>
>
> ---
> v2: Move signed off above the version change log
> v1: Patch collision with rtl_phydm.c, fix as per Greg
> ---
>   drivers/staging/rtlwifi/rtl8822be/fw.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/staging/rtlwifi/rtl8822be/fw.c b/drivers/staging/rtlwifi/rtl8822be/fw.c
> index f061dd1382aa..cf6b7a80b753 100644
> --- a/drivers/staging/rtlwifi/rtl8822be/fw.c
> +++ b/drivers/staging/rtlwifi/rtl8822be/fw.c
> @@ -743,6 +743,8 @@ void rtl8822be_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished)
>   		      u1_rsvd_page_loc, 3);
>   
>   	skb = dev_alloc_skb(totalpacketlen);
> +	if (!skb)
> +		return;
>   	memcpy((u8 *)skb_put(skb, totalpacketlen), &reserved_page_packet,
>   	       totalpacketlen);
>   


Reviewed-by: Mukesh Ojha <mojha at codeaurora.org>