From 255cc582e6e16191a20d54bcdbca6c91d3e90c5e Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Thu, 12 Dec 2024 10:57:42 +0000 Subject: [PATCH] ASoC: Intel: sof_sdw: Add space for a terminator into DAIs array MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The code uses the initialised member of the asoc_sdw_dailink struct to determine if a member of the array is in use. However in the case the array is completely full this will lead to an access 1 past the end of the array, expand the array by one entry to include a space for a terminator. Fixes: 27fd36aefa00 ("ASoC: Intel: sof-sdw: Add new code for parsing the snd_soc_acpi structs") Reviewed-by: Bard Liao Reviewed-by: Péter Ujfalusi Signed-off-by: Charles Keepax Link: https://patch.msgid.link/20241212105742.1508574-1-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown --- sound/soc/intel/boards/sof_sdw.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c index 810be7c949a5..f3369e569abc 100644 --- a/sound/soc/intel/boards/sof_sdw.c +++ b/sound/soc/intel/boards/sof_sdw.c @@ -1067,8 +1067,12 @@ static int sof_card_dai_links_create(struct snd_soc_card *card) return ret; } - /* One per DAI link, worst case is a DAI link for every endpoint */ - sof_dais = kcalloc(num_ends, sizeof(*sof_dais), GFP_KERNEL); + /* + * One per DAI link, worst case is a DAI link for every endpoint, also + * add one additional to act as a terminator such that code can iterate + * until it hits an uninitialised DAI. + */ + sof_dais = kcalloc(num_ends + 1, sizeof(*sof_dais), GFP_KERNEL); if (!sof_dais) return -ENOMEM; -- 2.50.1