linux-kernel - [PATCH] ASoC: simple-card-utils: Avoid over-allocating DLCs

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Message-Id: <20210805050706.46833-1-samuel@sholland.org>
Date:   Thu,  5 Aug 2021 00:07:06 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Samuel Holland <samuel@...lland.org>
Subject: [PATCH] ASoC: simple-card-utils: Avoid over-allocating DLCs

The allocation of the DAI link components (DLCs) passed the wrong
pointer to sizeof. Since simple_dai_props is much larger than
snd_soc_dai_link_component, there was no out of bounds access, only
wasted memory.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---
 sound/soc/generic/simple-card-utils.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 677f7da93b4b..10c63b73900c 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -640,8 +640,8 @@ int asoc_simple_init_priv(struct asoc_simple_priv *priv,
 			cnf_num += li->num[i].codecs;
 	}
 
-	dais = devm_kcalloc(dev, dai_num, sizeof(*dais),      GFP_KERNEL);
-	dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dai_props), GFP_KERNEL);
+	dais = devm_kcalloc(dev, dai_num, sizeof(*dais), GFP_KERNEL);
+	dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dlcs), GFP_KERNEL);
 	if (!dais || !dlcs)
 		return -ENOMEM;
 
-- 
2.31.1