At Fri, 15 Mar 2013 09:14:22 +0300,
Dan Carpenter wrote:
>
> "chn" here is a number between 0 and 255, but ->chn_info[] only has
> 16 elements so there is a potential write beyond the end of the
> array.
>
> If the seq_mode isn't SEQ_2 then we let the individual drivers
> (either opl3.c or midi_synth.c) handle it. Those functions all
> do a bounds check on "chn" so I haven't changed anything here.
> The opl3.c driver has up to 18 channels and not 16.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Thanks, applied now.
Takashi
> ---
> Static checker stuff.
>
> diff --git a/sound/oss/sequencer.c b/sound/oss/sequencer.c
> index 30bcfe4..4ff60a6 100644
> --- a/sound/oss/sequencer.c
> +++ b/sound/oss/sequencer.c
> @@ -545,6 +545,9 @@ static void seq_chn_common_event(unsigned char *event_rec)
> case MIDI_PGM_CHANGE:
> if (seq_mode == SEQ_2)
> {
> + if (chn > 15)
> + break;
> +
> synth_devs[dev]->chn_info[chn].pgm_num = p1;
> if ((int) dev >= num_synths)
> synth_devs[dev]->set_instr(dev, chn, p1);
> @@ -596,6 +599,9 @@ static void seq_chn_common_event(unsigned char *event_rec)
> case MIDI_PITCH_BEND:
> if (seq_mode == SEQ_2)
> {
> + if (chn > 15)
> + break;
> +
> synth_devs[dev]->chn_info[chn].bender_value = w14;
>
> if ((int) dev < num_synths)
>
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