linux-kernel - Re: [Bluez PATCH v1] bluetooth: fix passkey uninitialized when used

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Message-ID: <CAKwvOd=SD0AMwoxRovnPfAV70D7W4LPWtLHbui26A92ycUic=w@mail.gmail.com>
Date:   Tue, 18 Feb 2020 09:48:07 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Howard Chung <howardchung@...gle.com>
Cc:     linux-bluetooth@...r.kernel.org,
        Marcel Holtmann <marcel@...tmann.org>,
        chromeos-bluetooth-upstreaming@...omium.org,
        "David S. Miller" <davem@...emloft.net>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [Bluez PATCH v1] bluetooth: fix passkey uninitialized when used

On Tue, Feb 18, 2020 at 3:05 AM 'Howard Chung' via Clang Built Linux
<clang-built-linux@...glegroups.com> wrote:
>
> From: "howardchung@...gle.com" <howardchung@...gle.com>
>
> This issue cause a warning here
> https://groups.google.com/forum/#!topic/clang-built-linux/kyRKCjRsGoU
>
> Signed-off-by: Howard Chung <howardchung@...gle.com>

Reported-by: kbuild test robot <lkp@...el.com>

Thanks for the fix. No comment on whether or not the value 0 is
ignored here, but this should fix the warning.
Acked-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>
>  net/bluetooth/smp.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
> index 50e0ac692ec4..fa40de69e487 100644
> --- a/net/bluetooth/smp.c
> +++ b/net/bluetooth/smp.c
> @@ -2179,10 +2179,12 @@ static u8 smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb)
>                  */
>                 if (hci_find_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
>                                  hcon->role)) {
> +                       /* Set passkey to 0. The value can be any number since
> +                        * it'll be ignored anyway.
> +                        */
>                         err = mgmt_user_confirm_request(hcon->hdev, &hcon->dst,
>                                                         hcon->type,
> -                                                       hcon->dst_type,
> -                                                       passkey, 1);
> +                                                       hcon->dst_type, 0, 1);
>                         if (err)
>                                 return SMP_UNSPECIFIED;
>                         set_bit(SMP_FLAG_WAIT_USER, &smp->flags);
> --

-- 
Thanks,
~Nick Desaulniers