Correctly calculate available space including the size of the chunk buffer. This fixes a buffer overflow when multiple MIDI sysex messages are sent to a PODxt device.
Signed-off-by: Artem Egorkine arteme@gmail.com --- sound/usb/line6/midi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/usb/line6/midi.c b/sound/usb/line6/midi.c index d52355de2bbc..0838632c788e 100644 --- a/sound/usb/line6/midi.c +++ b/sound/usb/line6/midi.c @@ -44,7 +44,8 @@ static void line6_midi_transmit(struct snd_rawmidi_substream *substream) int req, done;
for (;;) { - req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size); + req = min3(line6_midibuf_bytes_free(mb), line6->max_packet_size, + LINE6_FALLBACK_MAXPACKETSIZE); done = snd_rawmidi_transmit_peek(substream, chunk, req);
if (done == 0)