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@xxxxxxxxx>
---
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 335f8d531548..fbcb55b6e8b0 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)
--
2.38.1
