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>

1 files changed, 4 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index f13834ba6b1d..6f170b281e85 100644
--- 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) {