mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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65 lines
2.0 KiB
Diff
65 lines
2.0 KiB
Diff
From 56ff68b1f93eaf22e5e0284648fd862dc08c9236 Mon Sep 17 00:00:00 2001
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From: Mohammad Johny Shaik <mjshai@codeaurora.org>
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Date: Thu, 12 Dec 2013 14:26:42 +0530
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Subject: Asoc:msm:Added Buffer overflow check
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The overflow check is required to ensure that user space data
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in kernel may not go beyond buffer boundary.
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Change-Id: I79b7e5f875fadcaeceb05f9163ae3666d4b6b7e1
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CRs-Fixed: 563086
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Signed-off-by: Mohammad Johny Shaik <mjshai@codeaurora.org>
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---
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arch/arm/mach-msm/qdsp6v2/audio_utils.c | 6 ++++++
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sound/soc/msm/qdsp6v2/q6asm.c | 3 +++
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2 files changed, 9 insertions(+)
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diff --git a/arch/arm/mach-msm/qdsp6v2/audio_utils.c b/arch/arm/mach-msm/qdsp6v2/audio_utils.c
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index 2a245f8..b8e55f9 100644
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--- a/arch/arm/mach-msm/qdsp6v2/audio_utils.c
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+++ b/arch/arm/mach-msm/qdsp6v2/audio_utils.c
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@@ -23,6 +23,7 @@
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#include <asm/ioctls.h>
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#include "audio_utils.h"
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+#define FRAME_SIZE (1 + ((1536+sizeof(struct meta_out_dsp)) * 5))
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static int audio_in_pause(struct q6audio_in *audio)
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{
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int rc;
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@@ -258,6 +259,11 @@ long audio_in_ioctl(struct file *file,
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rc = -EINVAL;
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break;
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}
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+ if ((cfg.buffer_size > FRAME_SIZE) ||
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+ (cfg.buffer_count != FRAME_NUM)) {
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+ rc = -EINVAL;
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+ break;
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+ }
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audio->str_cfg.buffer_size = cfg.buffer_size;
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audio->str_cfg.buffer_count = cfg.buffer_count;
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rc = q6asm_audio_client_buf_alloc(OUT, audio->ac,
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diff --git a/sound/soc/msm/qdsp6v2/q6asm.c b/sound/soc/msm/qdsp6v2/q6asm.c
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index 82b92aa9..09c40d6 100644
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--- a/sound/soc/msm/qdsp6v2/q6asm.c
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+++ b/sound/soc/msm/qdsp6v2/q6asm.c
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@@ -55,6 +55,7 @@
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#define READDONE_IDX_FLAGS 8
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#define READDONE_IDX_NUMFRAMES 9
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#define READDONE_IDX_SEQ_ID 10
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+#define FRAME_NUM (8)
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/* TODO, combine them together */
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static DEFINE_MUTEX(session_lock);
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@@ -608,6 +609,8 @@ int q6asm_audio_client_buf_alloc(unsigned int dir,
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pr_debug("%s: buffer already allocated\n", __func__);
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return 0;
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}
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+ if (bufcnt != FRAME_NUM)
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+ goto fail;
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mutex_lock(&ac->cmd_lock);
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buf = kzalloc(((sizeof(struct audio_buffer))*bufcnt),
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GFP_KERNEL);
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--
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cgit v1.1
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