ALSA: pcm: use new array-copying-wrapper

This is found by our static analysis tool.

pcm_native.c utilizes memdup_user() to copy an array from userspace.

There is a new wrapper, specifically designed for copying arrays. Use
this one instead.

This is similar to the
commit 3e91a38 ("fbdev: viafb: use new array-copying-wrapper").

Signed-off-by: Chenyuan Yang <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

Author: WhiteFox-Project

sound/core/pcm_native.c

@@ -3245,7 +3245,7 @@ static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
 	if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
 		return -EFAULT;
 
-	bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
+	bufs = memdup_array_user(xfern.bufs, runtime->channels, sizeof(void *));
 	if (IS_ERR(bufs))
 		return PTR_ERR(bufs);
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)