linux-kernel - Re: [PATCH wireless] brcmfmac: fix potential memory leak in brcmf_netdev_start

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Message-ID: <87bkp5sxj2.fsf@kernel.org>
Date:   Thu, 17 Nov 2022 12:09:05 +0200
From:   Kalle Valo <kvalo@...nel.org>
To:     Zhang Changzhong <zhangchangzhong@...wei.com>
Cc:     Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Eric Dumazet" <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>,
        <linux-wireless@...r.kernel.org>,
        <brcm80211-dev-list.pdl@...adcom.com>,
        <SHA-cyfmac-dev-list@...ineon.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH wireless] brcmfmac: fix potential memory leak in brcmf_netdev_start_xmit()

Zhang Changzhong <zhangchangzhong@...wei.com> writes:

> The brcmf_netdev_start_xmit() returns NETDEV_TX_OK without freeing skb
> in case of pskb_expand_head() fails, add dev_kfree_skb() to fix it.
>
> Fixes: 270a6c1f65fe ("brcmfmac: rework headroom check in .start_xmit()")
> Signed-off-by: Zhang Changzhong <zhangchangzhong@...wei.com>

I assume you have not tested this on a real device? Then it would be
really important to add "Compile tested only" to the commit log so that
we know it's untested.

-- 
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