Re: [PATCH] staging: rtl8822be: fix missing null check on dev_alloc_skb return

[Larry Finger]

On 11/17/2017 08:50 AM, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> dev_alloc_skb can potentially return NULL, so add a null check to
> avoid a null pointer dereference on skb

Acked-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>

Larry

> Detected by CoverityScan, CID#1454558 ("Dereference on null return")
>
> Fixes: 7e5b796cde7e ("staging: r8822be: Add the driver code")
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> ---
>   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 f45487122517..483ea85943c3 100644
> --- a/drivers/staging/rtlwifi/rtl8822be/fw.c
> +++ b/drivers/staging/rtlwifi/rtl8822be/fw.c
> @@ -464,6 +464,8 @@ bool rtl8822b_halmac_cb_write_data_rsvd_page(struct rtl_priv *rtlpriv, u8 *buf,
>   	int count;
>   
>   	skb = dev_alloc_skb(size);
> +	if (!skb)
> +		return false;
>   	memcpy((u8 *)skb_put(skb, size), buf, size);
>   
>   	if (!_rtl8822be_send_bcn_or_cmd_packet(rtlpriv->hw, skb, BEACON_QUEUE))