From 5157cc8113db3de60ab6320965331c63bc77003c Mon Sep 17 00:00:00 2001 From: Kulikov Vasiliy Date: Wed, 28 Jul 2010 20:40:51 +0400 Subject: [PATCH] ALSA: sb: check get_user() return value get_user() may fail, if so return -EFAULT. [Fixed one missing place by tiwai] Signed-off-by: Kulikov Vasiliy Signed-off-by: Takashi Iwai --- sound/isa/sb/emu8000_pcm.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/sound/isa/sb/emu8000_pcm.c b/sound/isa/sb/emu8000_pcm.c index ccedbfed061a..2f85c66f8e38 100644 --- a/sound/isa/sb/emu8000_pcm.c +++ b/sound/isa/sb/emu8000_pcm.c @@ -433,7 +433,8 @@ static int emu8k_transfer_block(struct snd_emu8000 *emu, int offset, unsigned sh while (count > 0) { unsigned short sval; CHECK_SCHEDULER(); - get_user(sval, buf); + if (get_user(sval, buf)) + return -EFAULT; EMU8000_SMLD_WRITE(emu, sval); buf++; count--; @@ -525,12 +526,14 @@ static int emu8k_pcm_copy(struct snd_pcm_substream *subs, while (count-- > 0) { unsigned short sval; CHECK_SCHEDULER(); - get_user(sval, buf); + if (get_user(sval, buf)) + return -EFAULT; EMU8000_SMLD_WRITE(emu, sval); buf++; if (rec->voices > 1) { CHECK_SCHEDULER(); - get_user(sval, buf); + if (get_user(sval, buf)) + return -EFAULT; EMU8000_SMRD_WRITE(emu, sval); buf++; } -- 2.20.1