1 files changed, 3 insertions, 0 deletions

diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c
index 558dadbf45f..e024e4588b8 100644
--- a/sound/core/seq/oss/seq_oss_synth.c
+++ b/sound/core/seq/oss/seq_oss_synth.c
@@ -604,6 +604,9 @@ snd_seq_oss_synth_make_info(struct seq_oss_devinfo *dp, int dev, struct synth_in
 {
         struct seq_oss_synth *rec;
 
+        if (dev < 0 || dev >= dp->max_synthdev)
+                return -ENXIO;
+
         if (dp->synths[dev].is_midi) {
                 struct midi_info minf;
                 snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf);