ALSA: hda - Add max allocation check in array allocator

Added a check for max allocation size in snd_array_new() for a
debugging purpose.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index f13834ba6b1d6fca3d13a6bca0e39bcafffb8b1f..6f170b281e85dd90799602671863c65cfaafa447 100644 (file)
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3399,7 +3399,10 @@ void *snd_array_new(struct snd_array *array)
 {
        if (array->used >= array->alloced) {
                int num = array->alloced + array->alloc_align;
-               void *nlist = kcalloc(num + 1, array->elem_size, GFP_KERNEL);
+               void *nlist;
+               if (snd_BUG_ON(num >= 4096))
+                       return NULL;
+               nlist = kcalloc(num + 1, array->elem_size, GFP_KERNEL);
                if (!nlist)
                        return NULL;
                if (array->list) {