linux-kernel - Re: [PATCH] nfx: llcp: fix possible use of uninitialized variable in nfc_llcp_send

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Message-ID: <06bba9db-25ff-a82b-803a-f9ae0519d293@linaro.org>
Date:   Sat, 13 May 2023 13:51:12 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Samuel Ortiz <sameo@...ux.intel.com>,
        Thierry Escande <thierry.escande@...labora.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nfx: llcp: fix possible use of uninitialized variable in
 nfc_llcp_send_connect()

On 13/05/2023 13:49, Krzysztof Kozlowski wrote:
> If sock->service_name is NULL, the local variable
> service_name_tlv_length will not be assigned by nfc_llcp_build_tlv(),
> later leading to using value frmo the stack.  Smatch warning:
> 
>   net/nfc/llcp_commands.c:442 nfc_llcp_send_connect() error: uninitialized symbol 'service_name_tlv_length'.

Eh, typo in subject prefix. V2 in shortly...


Best regards,
Krzysztof