From 184369b078e7c0c13bcd9f4487b994536713cc4c Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Fri, 18 Dec 2009 09:27:24 +0100 Subject: [PATCH] sound: sgio2audio/pdaudiocf/usb-audio: initialize PCM buffer commit 3e85fd614c7b6bb7f33bb04a0dcb5a3bfca4c0fe upstream. 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 Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/mips/sgio2audio.c | 2 +- sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c | 2 +- sound/usb/usbaudio.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/mips/sgio2audio.c b/sound/mips/sgio2audio.c index e497525bc11b..db7ff29ee9a1 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 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; diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 44b9cdc8a83b..b70527a92b01 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; -- 2.39.5