From 5a30862dec5a70da0a9d259de3f87a7542cc95b2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A1ssio=20Gabriel?= Date: Tue, 12 May 2026 11:03:53 -0300 Subject: [PATCH] ASoC: sdw_utils: Check speaker component string allocation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit devm_kasprintf() can fail while building the temporary speaker component string. If that happens, spk_components is set to NULL, but the current code can still pass it to strlen() on a later loop iteration or after the loop when appending the speaker component list to card->components. Use NULL to represent the initial "no speaker components" state, and return -ENOMEM immediately if building spk_components fails. Fixes: 0f60ecffbfe3 ("ASoC: sdw_utils: generate combined spk components string") Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260512-asoc-sdw-utils-spk-components-alloc-v1-1-c9bbd6d2e123@gmail.com Signed-off-by: Mark Brown --- sound/soc/sdw_utils/soc_sdw_utils.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/sound/soc/sdw_utils/soc_sdw_utils.c b/sound/soc/sdw_utils/soc_sdw_utils.c index be45a2e62d3e..e440c2327100 100644 --- a/sound/soc/sdw_utils/soc_sdw_utils.c +++ b/sound/soc/sdw_utils/soc_sdw_utils.c @@ -1114,7 +1114,7 @@ int asoc_sdw_rtd_init(struct snd_soc_pcm_runtime *rtd) struct asoc_sdw_codec_info *codec_info; struct snd_soc_dai *dai; struct sdw_slave *sdw_peripheral; - const char *spk_components=""; + const char *spk_components = NULL; int dai_index; int ret; int i; @@ -1197,7 +1197,7 @@ int asoc_sdw_rtd_init(struct snd_soc_pcm_runtime *rtd) else component = codec_info->dais[dai_index].component_name; - if (strlen (spk_components) == 0) + if (!spk_components) spk_components = devm_kasprintf(card->dev, GFP_KERNEL, "%s", component); else @@ -1205,13 +1205,15 @@ int asoc_sdw_rtd_init(struct snd_soc_pcm_runtime *rtd) spk_components = devm_kasprintf(card->dev, GFP_KERNEL, "%s+%s", spk_components, component); + + if (!spk_components) + return -ENOMEM; } codec_info->dais[dai_index].rtd_init_done = true; - } - if (strlen (spk_components) > 0) { + if (spk_components) { /* Update card components for speaker components */ card->components = devm_kasprintf(card->dev, GFP_KERNEL, "%s spk:%s", card->components, spk_components);