netdev - Re: [PATCH] wifi: mt76: add a check of vzalloc in mt7615_coredump

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Date:   Mon, 27 Feb 2023 14:33:12 +0100
From:   Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
To:     Kang Chen <void0red@...il.com>
Cc:     shayne.chen@...iatek.com, sean.wang@...iatek.com, kvalo@...nel.org,
        nbd@....name, lorenzo@...nel.org, ryder.lee@...iatek.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, matthias.bgg@...il.com,
        angelogioacchino.delregno@...labora.com,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] wifi: mt76: add a check of vzalloc in
 mt7615_coredump_work

> vzalloc may fails, dump might be null and will cause
> illegal address access later.

can you please add a Fixes tag?

Regards,
Lorenzo

> 
> Signed-off-by: Kang Chen <void0red@...il.com>
> ---
>  drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
> index a95602473..73d84c301 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
> @@ -2367,6 +2367,9 @@ void mt7615_coredump_work(struct work_struct *work)
>  	}
>  
>  	dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
> +	if (!dump)
> +		return;
> +
>  	data = dump;
>  
>  	while (true) {
> -- 
> 2.34.1
> 

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