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-rw-r--r--sound/core/seq/oss/seq_oss_event.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/sound/core/seq/oss/seq_oss_event.c b/sound/core/seq/oss/seq_oss_event.c
index 066f5f3e3f4c..c3908862bc8b 100644
--- a/sound/core/seq/oss/seq_oss_event.c
+++ b/sound/core/seq/oss/seq_oss_event.c
@@ -285,7 +285,12 @@ local_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev
static int
note_on_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev)
{
- struct seq_oss_synthinfo *info = &dp->synths[dev];
+ struct seq_oss_synthinfo *info;
+
+ if (!snd_seq_oss_synth_is_valid(dp, dev))
+ return -ENXIO;
+
+ info = &dp->synths[dev];
switch (info->arg.event_passing) {
case SNDRV_SEQ_OSS_PROCESS_EVENTS:
if (! info->ch || ch < 0 || ch >= info->nr_voices) {
@@ -340,7 +345,12 @@ note_on_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, st
static int
note_off_event(struct seq_oss_devinfo *dp, int dev, int ch, int note, int vel, struct snd_seq_event *ev)
{
- struct seq_oss_synthinfo *info = &dp->synths[dev];
+ struct seq_oss_synthinfo *info;
+
+ if (!snd_seq_oss_synth_is_valid(dp, dev))
+ return -ENXIO;
+
+ info = &dp->synths[dev];
switch (info->arg.event_passing) {
case SNDRV_SEQ_OSS_PROCESS_EVENTS:
if (! info->ch || ch < 0 || ch >= info->nr_voices) {