Commit 571a8c522e caused the HMP wavcapture command to segfault when
processing audio data in audio_pcm_sw_write(), where a NULL
sw->hw->pcm_ops is dereferenced. This fix checks that the pointer is
valid before dereferincing it. A similar fix is also made in the
parallel function audio_pcm_sw_read().
Fixes: 571a8c522e (audio: split ctl_* functions into enable_* and
volume_*)
Signed-off-by: Bruce Rogers <address@hidden>
---
audio/audio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/audio/audio.c b/audio/audio.c
index 7a9e680355..08a067722b 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -649,7 +649,7 @@ static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf,
size_t size)
total += isamp;
}
- if (!hw->pcm_ops->volume_in) {
+ if (hw->pcm_ops && !hw->pcm_ops->volume_in) {
mixeng_volume (sw->buf, ret, &sw->vol);
}
@@ -736,7 +736,7 @@ static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size)
if (swlim) {
sw->conv (sw->buf, buf, swlim);
- if (!sw->hw->pcm_ops->volume_out) {
+ if (sw->hw->pcm_ops && !sw->hw->pcm_ops->volume_out) {
mixeng_volume (sw->buf, swlim, &sw->vol);
}
}