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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/usb/usbaudio.c | |
| parent | 2fbe74b90bafebce615466b4c20f96b0465df1ae (diff) | |
| download | linux-3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe.tar.gz linux-3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe.tar.bz2 linux-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/usb/usbaudio.c')
| -rw-r--r-- | sound/usb/usbaudio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index b074a594c595..4963defee18a 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -752,7 +752,7 @@ static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t s return 0; /* already large enough */ vfree(runtime->dma_area); } - runtime->dma_area = vmalloc(size); + runtime->dma_area = vmalloc_user(size); if (!runtime->dma_area) return -ENOMEM; runtime->dma_bytes = size; |