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38 lines
1.4 KiB
Diff
38 lines
1.4 KiB
Diff
From a7a6ddc91cce7ad5ad55c9709b24bfc80f5ac873 Mon Sep 17 00:00:00 2001
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From: Patrick Daly <pdaly@codeaurora.org>
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Date: Thu, 28 May 2015 18:32:49 -0700
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Subject: ASoC: wcd9xxx: Fix unprotected userspace access
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Protect against memory faults while accessing userspace addresses.
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Change-Id: I1433bac73d24d428749558e530e6869c2e5ee98f
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Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
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---
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sound/soc/codecs/wcdcal-hwdep.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/sound/soc/codecs/wcdcal-hwdep.c b/sound/soc/codecs/wcdcal-hwdep.c
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index 5013bee..954620a 100644
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--- a/sound/soc/codecs/wcdcal-hwdep.c
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+++ b/sound/soc/codecs/wcdcal-hwdep.c
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@@ -1,5 +1,5 @@
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/*
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- * Copyright (c) 2014, The Linux Foundation. All rights reserved.
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+ * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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@@ -82,7 +82,8 @@ static int wcdcal_hwdep_ioctl_shared(struct snd_hwdep *hw,
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return -EFAULT;
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}
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data = fw[fw_user.cal_type]->data;
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- memcpy(data, fw_user.buffer, fw_user.size);
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+ if (copy_from_user(data, fw_user.buffer, fw_user.size))
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+ return -EFAULT;
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fw[fw_user.cal_type]->size = fw_user.size;
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mutex_lock(&fw_data->lock);
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set_bit(WCDCAL_RECIEVED, &fw_data->wcdcal_state[fw_user.cal_type]);
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--
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cgit v1.1
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