There is a missing lower bound check on "pitchbend" so it means we can read up to 6 elements before the start of the opl3_note_table[] array.
Thanks to Clemens Ladisch for his help with this patch.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com --- v3: The first two versions of this broke the user space API.
diff --git a/sound/drivers/opl3/opl3_midi.c b/sound/drivers/opl3/opl3_midi.c index f62780e..7821b07 100644 --- a/sound/drivers/opl3/opl3_midi.c +++ b/sound/drivers/opl3/opl3_midi.c @@ -105,6 +105,8 @@ static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, int pitchbend = chan->midi_pitchbend; int segment;
+ if (pitchbend < -0x2000) + pitchbend = -0x2000; if (pitchbend > 0x1FFF) pitchbend = 0x1FFF;