[PATCH AUTOSEL 4.19 03/22] ALSA: usb-audio: US16x08: Move overflow check before array access

[PATCH AUTOSEL 4.19 03/22] ALSA: usb-audio: US16x08: Move overflow check before array access

[Sasha Levin]

From: Daniil Dementev <d.dementev@ispras.ru>

[ Upstream commit 3ddbe35d9a2ebd4924d458e0246b4ba6c13bb456 ]

Buffer overflow could occur in the loop "while", due to accessing an
array element before checking the index.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Daniil Dementev <d.dementev@ispras.ru>
Reviewed-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Link: https://lore.kernel.org/r/20220610165732.2904-1-d.dementev@ispras.ru
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/usb/mixer_us16x08.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/usb/mixer_us16x08.c b/sound/usb/mixer_us16x08.c
index 7db3032e723a..5e3b7fd43fc2 100644
--- a/sound/usb/mixer_us16x08.c
+++ b/sound/usb/mixer_us16x08.c
@@ -647,10 +647,10 @@ static int snd_get_meter_comp_index(struct snd_us16x08_meter_store *store)
 		}
 	} else {
 		/* skip channels with no compressor active */
-		while (!store->comp_store->val[
+		while (store->comp_index <= SND_US16X08_MAX_CHANNELS
+			&& !store->comp_store->val[
 			COMP_STORE_IDX(SND_US16X08_ID_COMP_SWITCH)]
-			[store->comp_index - 1]
-			&& store->comp_index <= SND_US16X08_MAX_CHANNELS) {
+			[store->comp_index - 1]) {
 			store->comp_index++;
 		}
 		ret = store->comp_index++;
-- 
2.35.1

[PATCH AUTOSEL 4.19 06/22] ALSA: x86: intel_hdmi_audio: enable pm_runtime and set autosuspend delay

[Sasha Levin]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit e87c65aeb46ca4f5b7dc08531200bcb8a426c62e ]

The existing code uses pm_runtime_get_sync/put_autosuspend, but
pm_runtime was not explicitly enabled. The autosuspend delay was not
set either, the value is set to 5s since HDMI is rather painful to
resume.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220616222910.136854-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/x86/intel_hdmi_audio.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index 3841336dc9cd..0c39ab628267 100644
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -42,6 +42,8 @@
 #include <drm/intel_lpe_audio.h>
 #include "intel_hdmi_audio.h"
 
+#define INTEL_HDMI_AUDIO_SUSPEND_DELAY_MS  5000
+
 #define for_each_pipe(card_ctx, pipe) \
 	for ((pipe) = 0; (pipe) < (card_ctx)->num_pipes; (pipe)++)
 #define for_each_port(card_ctx, port) \
@@ -1898,8 +1900,11 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
 	pdata->notify_audio_lpe = notify_audio_lpe;
 	spin_unlock_irq(&pdata->lpe_audio_slock);
 
+	pm_runtime_set_autosuspend_delay(&pdev->dev, INTEL_HDMI_AUDIO_SUSPEND_DELAY_MS);
 	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
 	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_idle(&pdev->dev);
 
 	dev_dbg(&pdev->dev, "%s: handle pending notification\n", __func__);
 	for_each_port(card_ctx, port) {
-- 
2.35.1