39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jayachandran B <jayachandran.b@intel.com>
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Date: Tue, 14 Jun 2016 10:39:48 +0530
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Subject: [PATCH] ASoC: Intel: Skylake: Probe-Limit the bytes to copy
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If userspace happens to issue a copy with count > ring buffer size,
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limit the count to the allocated ring buffer size to avoid out of
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bound access into the buffer.
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Change-Id: I7acbfb64bda299237a9d56bbac4a022d36b28bfd
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Signed-off-by: Jayachandran B <jayachandran.b@intel.com>
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Reviewed-on:
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Reviewed-by: Babu, Ramesh <ramesh.babu@intel.com>
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Tested-by: Babu, Ramesh <ramesh.babu@intel.com>
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---
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sound/soc/intel/skylake/skl-probe.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/sound/soc/intel/skylake/skl-probe.c b/sound/soc/intel/skylake/skl-probe.c
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index 7d2379806daf..507513eabbd6 100644
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--- a/sound/soc/intel/skylake/skl-probe.c
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+++ b/sound/soc/intel/skylake/skl-probe.c
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@@ -230,6 +230,12 @@ int skl_probe_compr_copy(struct snd_compr_stream *stream, char __user *buf,
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{
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int offset = 0, availcount = 0, retval = 0, copy;
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void *dstn;
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+ /*
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+ * If userspace happens to issue a copy with count > ring buffer size,
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+ * limit the count to the allocated ring buffer size.
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+ */
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+ if (count > stream->runtime->buffer_size)
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+ count = stream->runtime->buffer_size;
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if (stream->direction == SND_COMPRESS_CAPTURE) {
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offset = stream->runtime->total_bytes_transferred %
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--
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https://clearlinux.org
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