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ALSA: compress_core: integer overflow in snd_compr_allocate_buffer()

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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>
This commit is contained in:
Dan Carpenter 2012-09-05 15:32:18 +03:00 committed by Takashi Iwai
parent 1dac6695c6
commit b35cc82258
1 changed files with 4 additions and 0 deletions
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4
sound/core/compress_offload.c
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@ -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;