linux-kernel - Re: [PATCH] wil6210: fix potential out-of-bounds read

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Date:   Mon, 29 Apr 2019 10:23:11 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Kalle Valo <kvalo@...eaurora.org>
Cc:     Maya Erez <merez@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>,
        linux-wireless@...r.kernel.org, wil6210@....qualcomm.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wil6210: fix potential out-of-bounds read



On 4/29/19 10:00 AM, Kalle Valo wrote:
> "Gustavo A. R. Silva" <gustavo@...eddedor.com> wrote:
> 
>> Notice that *rc* can evaluate to up to 5, include/linux/netdevice.h:
>>
>> enum gro_result {
>>         GRO_MERGED,
>>         GRO_MERGED_FREE,
>>         GRO_HELD,
>>         GRO_NORMAL,
>>         GRO_DROP,
>>         GRO_CONSUMED,
>> };
>> typedef enum gro_result gro_result_t;
>>
>> In case *rc* evaluates to 5, we end up having an out-of-bounds read
>> at drivers/net/wireless/ath/wil6210/txrx.c:821:
>>
>> 	wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n",
>> 		     len, gro_res_str[rc]);
>>
>> Fix this by adding element "GRO_CONSUMED" to array gro_res_str.
>>
>> Addresses-Coverity-ID: 1444666 ("Out-of-bounds read")
>> Fixes: 194b482b5055 ("wil6210: Debug print GRO Rx result")
>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>> Reviewed-by: Maya Erez <merez@...eaurora.org>
>> Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
> 
> Patch applied to ath-next branch of ath.git, thanks.
> 
> bfabdd699732 wil6210: fix potential out-of-bounds read
> 

Awesome. :)

Thanks, Kalle.
--
Gustavo