Subject: Re: [PATCH] brcmfmac: check ndev pointer

From: Kalle Valo <[email-masked]>
Date: Tue, 18 Aug 2020 12:50:04 +0000 (UTC)

[email-masked] wrote:

> From: Tom Rix <[email-masked]>
> 
> Clang static analysis reports this error
> 
> brcmfmac/core.c:490:4: warning: Dereference of null pointer
>         (*ifp)->ndev->stats.rx_errors++;
>         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> In this block of code
> 
> 	if (ret || !(*ifp) || !(*ifp)->ndev) {
> 		if (ret != -ENODATA && *ifp)
> 			(*ifp)->ndev->stats.rx_errors++;
> 		brcmu_pkt_buf_free_skb(skb);
> 		return -ENODATA;
> 	}
> 
> (*ifp)->ndev being NULL is caught as an error
> But then it is used to report the error.
> 
> So add a check before using it.
> 
> Fixes: 91b632803ee4 ("brcmfmac: Use net_device_stats from struct net_device")
> Signed-off-by: Tom Rix <[email-masked]>

Patch applied to wireless-drivers-next.git, thanks.

9c9f015bc9f8 brcmfmac: check ndev pointer

-- 
https://patchwork.kernel.org/patch/11696567/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches