DivestOS/Patches/Linux_CVEs/CVE-2012-6703/ANY/1.patch.dupe

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2017-10-29 22:14:37 -04:00
From 81ce573830e9d5531531b3ec778c58e6b9167bcd Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 5 Sep 2012 15:32:18 +0300
Subject: [PATCH] ALSA: compress_core: integer overflow in
snd_compr_allocate_buffer()
These are 32 bit values that come from the user, we need to check for
integer overflows or we could end up allocating a smaller buffer than
expected.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/core/compress_offload.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index eb60cb8dbb8a6..68fe02c7400a2 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -407,6 +407,10 @@ static int snd_compr_allocate_buffer(struct snd_compr_stream *stream,
unsigned int buffer_size;
void *buffer;
+ if (params->buffer.fragment_size == 0 ||
+ params->buffer.fragments > SIZE_MAX / params->buffer.fragment_size)
+ return -EINVAL;
+
buffer_size = params->buffer.fragment_size * params->buffer.fragments;
if (stream->ops->copy) {
buffer = NULL;