[PATCH 5.10 050/132] ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*()

Greg Kroah-Hartman
2021-12-13T10:17:51Z

From: Takashi Iwai <tiwai@suse.de>

commit 6665bb30a6b1a4a853d52557c05482ee50e71391 upstream.

A couple of calls in snd_pcm_oss_change_params_locked() ignore the
possible errors. Catch those errors and abort the operation for
avoiding further problems.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211201073606.11660-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/core/oss/pcm_oss.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)

--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -884,8 +884,15 @@ static int snd_pcm_oss_change_params_loc
err = -EINVAL;
goto failure;
}
- choose_rate(substream, sparams, runtime->oss.rate);
- snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
+
+ err = choose_rate(substream, sparams, runtime->oss.rate);
+ if (err < 0)
+ goto failure;
+ err = snd_pcm_hw_param_near(substream, sparams,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ runtime->oss.channels, NULL);
+ if (err < 0)
+ goto failure;

format = snd_pcm_oss_format_from(runtime->oss.format);