[PATCH v1] ALSA: usb-audio: Use kmemdup_array instead of kmemdup for multiple allocation

[Shen Lichuan]

Let the kmemdup_array() take care about multiplication
and possible overflows.

Using kmemdup_array() is more appropriate and makes the code
easier to audit.

Signed-off-by: Shen Lichuan <shenlichuan@xxxxxxxx>
---
 sound/usb/quirks.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index e7b68c67852e..53c69f3069c4 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -167,8 +167,8 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
 		return -EINVAL;
 	}
 	if (fp->nr_rates > 0) {
-		rate_table = kmemdup(fp->rate_table,
-				     sizeof(int) * fp->nr_rates, GFP_KERNEL);
+		rate_table = kmemdup_array(fp->rate_table, fp->nr_rates, sizeof(int),
+					   GFP_KERNEL);
 		if (!rate_table) {
 			kfree(fp);
 			return -ENOMEM;
-- 
2.17.1