Re: [PATCH] avrcp: Fix wrong pointer check

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Hi Andrei,

On Fri, Jan 31, 2014 at 12:33 AM, Andrei Emeltchenko
<Andrei.Emeltchenko.news@xxxxxxxxx> wrote:
> From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
>
> There is wrong assumption that handler might be NULL while it is a
> pointer to a struct table so check instead for struct members. This
> fixes accessing wrong memory.
> ---
>  profiles/audio/avrcp.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/profiles/audio/avrcp.c b/profiles/audio/avrcp.c
> index df88138..5030ce1 100644
> --- a/profiles/audio/avrcp.c
> +++ b/profiles/audio/avrcp.c
> @@ -1673,7 +1673,7 @@ static size_t handle_vendordep_pdu(struct avctp *conn, uint8_t transaction,
>                         break;
>         }
>
> -       if (!handler || handler->code != *code) {
> +       if (!handler->code || handler->code != *code) {

The code checks if  session->control_handlers is initialized and Im
not sure what is the invalid memory access you are talking about since
handle->code is no a pointer, I do agree that we should probably drop
the second check for the handler in the lines bellow.

-- 
Luiz Augusto von Dentz
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