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https://github.com/Divested-Mobile/DivestOS-Build.git
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45 lines
1.6 KiB
Diff
45 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Brian Delwiche <delwiche@google.com>
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Date: Thu, 25 Aug 2022 18:52:28 +0000
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Subject: [PATCH] RESTRICT AUTOMERGE Added max buffer length check
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Bug: 230867224
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Test: Manual -- paired Bluetooth headset and played audio
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Tags: #security
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Ignore-AOSP-First: Security
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Change-Id: I740038288143715a1c06db781efd674b269a7f3e
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(cherry picked from commit 769f55450bd2eb94ddb9080f730e404de7716bda)
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Merged-In: I740038288143715a1c06db781efd674b269a7f3e
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---
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stack/avct/avct_lcb_act.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/stack/avct/avct_lcb_act.c b/stack/avct/avct_lcb_act.c
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index 878dd82b7..173c3070e 100644
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--- a/stack/avct/avct_lcb_act.c
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+++ b/stack/avct/avct_lcb_act.c
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@@ -30,6 +30,7 @@
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#include "avct_int.h"
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#include "bt_common.h"
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#include "btm_api.h"
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+#include "osi/include/log.h"
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/* packet header length lookup table */
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const UINT8 avct_lcb_pkt_type_len[] = {
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@@ -61,8 +62,14 @@ static BT_HDR *avct_lcb_msg_asmbl(tAVCT_LCB *p_lcb, BT_HDR *p_buf)
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AVCT_PRS_PKT_TYPE(p, pkt_type);
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/* quick sanity check on length */
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- if (p_buf->len < avct_lcb_pkt_type_len[pkt_type])
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+ if (p_buf->len < avct_lcb_pkt_type_len[pkt_type] ||
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+ (sizeof(BT_HDR) + p_buf->offset + p_buf->len) > BT_DEFAULT_BUFFER_SIZE)
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{
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+ if ((sizeof(BT_HDR) + p_buf->offset + p_buf->len) >
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+ BT_DEFAULT_BUFFER_SIZE)
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+ {
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+ android_errorWriteWithInfoLog(0x534e4554, "230867224", -1, NULL, 0);
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+ }
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osi_free(p_buf);
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AVCT_TRACE_WARNING("Bad length during reassembly");
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p_ret = NULL;
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