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| author | Clemens Ladisch <clemens@ladisch.de> | 2009-12-18 09:27:24 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-12-18 12:53:17 +0100 |
| commit | 3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe (patch) | |
| tree | f3557d913f1f3e8ee29ebef960bc9b4a7222fa53 /sound/pcmcia/pdaudiocf | |
| parent | 2fbe74b90bafebce615466b4c20f96b0465df1ae (diff) | |
| download | lwn-3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe.tar.gz lwn-3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe.zip | |
sound: sgio2audio/pdaudiocf/usb-audio: initialize PCM buffer
When allocating the PCM buffer, use vmalloc_user() instead of vmalloc().
Otherwise, it would be possible for applications to play the previous
contents of the kernel memory to the speakers, or to read it directly if
the buffer is exported to userspace.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pcmcia/pdaudiocf')
| -rw-r--r-- | sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c b/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c index d057e6489643..5cfa608823f7 100644 --- a/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c +++ b/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c @@ -51,7 +51,7 @@ static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t s return 0; /* already enough large */ vfree(runtime->dma_area); } - runtime->dma_area = vmalloc_32(size); + runtime->dma_area = vmalloc_32_user(size); if (! runtime->dma_area) return -ENOMEM; runtime->dma_bytes = size; |