ALSA: ctxfi - Fix possible buffer pointer overrun

[linux-2.6.git] / sound / pci / ctxfi / ctpcm.c

diff --git a/sound/pci/ctxfi/ctpcm.c b/sound/pci/ctxfi/ctpcm.c
index a0bd31c6090d6e727ce9caeb1336b64026b052dd..870fa170f046ab632abe9cd2ee40562f87b69b43 100644 (file)
--- a/sound/pci/ctxfi/ctpcm.c
+++ b/sound/pci/ctxfi/ctpcm.c
@@ -243,6 +243,8 @@ ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
        /* Read out playback position */
        position = atc->pcm_playback_position(atc, apcm);
        position = bytes_to_frames(runtime, position);
+       if (position >= runtime->buffer_size)
+               position = 0;
        return position;
 }
 
@@ -343,6 +345,8 @@ ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
        /* Read out playback position */
        position = atc->pcm_capture_position(atc, apcm);
        position = bytes_to_frames(runtime, position);
+       if (position >= runtime->buffer_size)
+               position = 0;
        return position;
 }