ALSA: usb - driver neglects kmalloc return value check and may deref NULL

[net-next-2.6.git] / sound / usb / pcm.c

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index cff3a3c465d736f17d73a4cf6c01c54c936469c3..4132522ac90f8c88da831b68f9cbdf777131de8e 100644 (file)
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -676,8 +676,10 @@ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
        if (!needs_knot)
                return 0;
 
-       subs->rate_list.count = count;
        subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
+       if (!subs->rate_list.list)
+               return -ENOMEM;
+       subs->rate_list.count = count;
        subs->rate_list.mask = 0;
        count = 0;
        list_for_each_entry(fp, &subs->fmt_list, list) {