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authorClemens Ladisch <clemens@ladisch.de>2009-12-18 09:27:24 +0100
committerTakashi Iwai <tiwai@suse.de>2009-12-18 12:53:17 +0100
commit3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe (patch)
treef3557d913f1f3e8ee29ebef960bc9b4a7222fa53 /sound
parent2fbe74b90bafebce615466b4c20f96b0465df1ae (diff)
downloadlinux-2.6.34-ux500-3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe.tar.gz
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')
-rw-r--r--sound/mips/sgio2audio.c2
-rw-r--r--sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c2
-rw-r--r--sound/usb/usbaudio.c2
3 files changed, 3 insertions, 3 deletions
diff --git a/sound/mips/sgio2audio.c b/sound/mips/sgio2audio.c
index 8691f4cf619..f1d9d16b548 100644
--- a/sound/mips/sgio2audio.c
+++ b/sound/mips/sgio2audio.c
@@ -609,7 +609,7 @@ static int snd_sgio2audio_pcm_hw_params(struct snd_pcm_substream *substream,
/* alloc virtual 'dma' area */
if (runtime->dma_area)
vfree(runtime->dma_area);
- runtime->dma_area = vmalloc(size);
+ runtime->dma_area = vmalloc_user(size);
if (runtime->dma_area == NULL)
return -ENOMEM;
runtime->dma_bytes = size;
diff --git a/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c b/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c
index d057e648964..5cfa608823f 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;
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index b074a594c59..4963defee18 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;