In snd_emux_control() method "snd_emux_port" can be passed with  field chset.midi_mode == SNDRV_MIDI_MODE_XG. The "type" can be  MIDI_CTL_PITCHBEND or MIDI_CTL_CHAN_PRESSURE. It may lead to accessing 'control' array of size 128 with  MIDI_CTL_PITCHBEND (0x80) or MIDI_CTL_CHAN_PRESSURE (0x82) index.   How can we prevent this? Would it be a good solution to place code like this  before call snd_emux_xg_control()?   if (type == MIDI_CTL_PITCHBEND || type == MIDI_CTL_CHAN_PRESSURE){     return; }   Found by Linux Verification Center (linuxtesting.org) with SVACE.