[PATCH] ASoC: codecs: wm8904: Add const to drc_texts allocation type

[Kees Cook <kees@kernel.org>]

From: Kees Cook <kees+treewide@kernel.org>

In preparation for converting the kmalloc family of allocators to the
type-aware kmalloc_obj family, we need to make sure that the returned
type from the allocation matches the type of the variable being
assigned. (The kmalloc family returns "void *", which can be implicitly
cast to any pointer type.)

The assigned type is "const char **", but the converted allocation type
would be "char **", which is the same type without the const qualifier.
As there is no general way to safely add const qualifiers, take the size
from the assignment target instead. No change in allocation size
results.

Build tested ARCH=x86_64 allmodconfig with GCC 16.2.0:
sound/soc/codecs/wm8904.o

Assisted-by: LLM coccinelle
Signed-off-by: Kees Cook <kees+treewide@kernel.org>
---
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
Cc: Francesco Dolcini <francesco.dolcini@toradex.com>
Cc: Andrew Davis <afd@ti.com>
Cc: <patches@opensource.cirrus.com>
Cc: <linux-sound@vger.kernel.org>
---
 sound/soc/codecs/wm8904.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c
index 9e5782e50f47..f6c31f2f5f1f 100644
--- a/sound/soc/codecs/wm8904.c
+++ b/sound/soc/codecs/wm8904.c
@@ -2186,7 +2186,7 @@ static void wm8904_handle_pdata(struct snd_soc_component *component)
 
 		/* We need an array of texts for the enum API */
 		wm8904->drc_texts = kmalloc_array(pdata->num_drc_cfgs,
-						  sizeof(char *),
+						  sizeof(*wm8904->drc_texts),
 						  GFP_KERNEL);
 		if (!wm8904->drc_texts)
 			return;
-- 
2.34.1