From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 6 Nov 2008 23:26:52 +0000 (+0100)
Subject: ALSA: hda - Add max allocation check in array allocator
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b910d9ae5b370cf5bf9d6a71028119861b6ea8a4;p=deliverable%2Flinux.git

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 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) {