[PATCH] ALSA: pcm: use new array-copying-wrapper

[yangchenyuan <chenyuan0y@xxxxxxxxx>]

From: Chenyuan Yang <chenyuan0y@xxxxxxxxx>

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 3e91a38de1dc ("fbdev: viafb: use new array-copying-wrapper").

Fixes: 67616feda99e ("ALSA: pcm: Unify ioctl functions for playback and capture streams")
Signed-off-by: Chenyuan Yang <chenyuan0y@xxxxxxxxx>
---
 sound/core/pcm_native.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 8a3384342e8d..6c2b6a62d9d2 100644
--- a/sound/core/pcm_native.c
+++ b/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)
-- 
2.34.1