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| author | Takashi Iwai <tiwai@suse.de> | 2013-10-29 15:07:19 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-10-29 15:07:19 +0100 |
| commit | a8d09e3a6dfc44fd2246f3c57d2cd00e1a56e2bd (patch) | |
| tree | 388221310817c32736967e0622027c93ebb0c7e4 | |
| parent | a40a3937222c728be925f2d78650cfe9b20be3f5 (diff) | |
| download | lwn-a8d09e3a6dfc44fd2246f3c57d2cd00e1a56e2bd.tar.gz lwn-a8d09e3a6dfc44fd2246f3c57d2cd00e1a56e2bd.zip | |
ALSA: opl3: Fix possible negative array index access
Spotted by coverity CID 115196.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/drivers/opl3/opl3_midi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_midi.c b/sound/drivers/opl3/opl3_midi.c index 0c796bcbc0a3..6c6d09a51f42 100644 --- a/sound/drivers/opl3/opl3_midi.c +++ b/sound/drivers/opl3/opl3_midi.c @@ -390,6 +390,11 @@ void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) voice = snd_opl3_oss_map[chan->number]; } + if (voice < 0) { + spin_unlock_irqrestore(&opl3->voice_lock, flags); + return; + } + if (voice < MAX_OPL2_VOICES) { /* Left register block for voices 0 .. 8 */ reg_side = OPL3_LEFT; |