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33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
From 46135d80765cb70a914f02a6e7b6abe64679ec86 Mon Sep 17 00:00:00 2001
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From: Mohammad Johny Shaik <mjshai@codeaurora.org>
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Date: Wed, 13 Nov 2013 15:45:34 -0800
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Subject: msm:qdsp6v2: Check null pointer on userspace data argument in kernel
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The null pointer check is required to ensure that userspace data
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in kernalspace is not null.
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Change-Id: I9e522c393ae643626a4bae03731a73f5d6db6458
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CRs-Fixed: 563752
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Signed-off-by: Mohammad Johny Shaik <mjshai@codeaurora.org>
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---
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sound/soc/msm/qdsp6v2/msm-lsm-client.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/sound/soc/msm/qdsp6v2/msm-lsm-client.c b/sound/soc/msm/qdsp6v2/msm-lsm-client.c
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index fe6ed29..2bca5e18 100644
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--- a/sound/soc/msm/qdsp6v2/msm-lsm-client.c
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+++ b/sound/soc/msm/qdsp6v2/msm-lsm-client.c
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@@ -170,6 +170,9 @@ static int msm_lsm_ioctl(struct snd_pcm_substream *substream,
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*/
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rc = -EFAULT;
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} else {
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+ if (!access_ok(VERIFY_READ, user,
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+ sizeof(struct snd_lsm_event_status)))
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+ rc = -EFAULT;
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if (user->payload_size <
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event_status->payload_size) {
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pr_debug("%s: provided %dbytes isn't enough, needs %dbytes\n",
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--
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cgit v1.1
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