From 9a51bc522442133f0b8b7ecdb4bc5d74c20bc50e Mon Sep 17 00:00:00 2001 From: Wentao Liang Date: Wed, 14 May 2025 17:24:44 +0800 Subject: [PATCH] ALSA: es1968: Add error handling for snd_pcm_hw_constraint_pow2() commit 9e000f1b7f31684cc5927e034360b87ac7919593 upstream. The function snd_es1968_capture_open() calls the function snd_pcm_hw_constraint_pow2(), but does not check its return value. A proper implementation can be found in snd_cx25821_pcm_open(). Add error handling for snd_pcm_hw_constraint_pow2() and propagate its error code. Fixes: b942cf815b57 ("[ALSA] es1968 - Fix stuttering capture") Cc: stable@vger.kernel.org # v2.6.22 Signed-off-by: Wentao Liang Link: https://patch.msgid.link/20250514092444.331-1-vulab@iscas.ac.cn Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/es1968.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c index 4a7e20bb11bca..802c5ed4a5ba4 100644 --- a/sound/pci/es1968.c +++ b/sound/pci/es1968.c @@ -1569,7 +1569,7 @@ static int snd_es1968_capture_open(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime = substream->runtime; struct es1968 *chip = snd_pcm_substream_chip(substream); struct esschan *es; - int apu1, apu2; + int err, apu1, apu2; apu1 = snd_es1968_alloc_apu_pair(chip, ESM_APU_PCM_CAPTURE); if (apu1 < 0) @@ -1613,7 +1613,9 @@ static int snd_es1968_capture_open(struct snd_pcm_substream *substream) runtime->hw = snd_es1968_capture; runtime->hw.buffer_bytes_max = runtime->hw.period_bytes_max = calc_available_memory_size(chip) - 1024; /* keep MIXBUF size */ - snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES); + err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES); + if (err < 0) + return err; spin_lock_irq(&chip->substream_lock); list_add(&es->list, &chip->substream_list);