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33 lines
1.2 KiB
Diff
33 lines
1.2 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: Tue, 27 Sep 2022 22:05:08 +0000
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Subject: [PATCH] Add bounds check in avdt_scb_act.cc
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Bug: 242535997
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Test: BT unit tests, validated against researcher POC
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Tag: #security
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Ignore-AOSP-First: Security
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Change-Id: I3b982e5d447cb98ad269b3da3d7d591819b2e4e4
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(cherry picked from commit eca4a3cdb0da240496341f546a57397434ec85dd)
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Merged-In: I3b982e5d447cb98ad269b3da3d7d591819b2e4e4
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---
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stack/avdt/avdt_scb_act.cc | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/stack/avdt/avdt_scb_act.cc b/stack/avdt/avdt_scb_act.cc
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index 5e0e98d80..ea9c0bceb 100644
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--- a/stack/avdt/avdt_scb_act.cc
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+++ b/stack/avdt/avdt_scb_act.cc
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@@ -957,6 +957,11 @@ void avdt_scb_hdl_write_req(tAVDT_SCB* p_scb, tAVDT_SCB_EVT* p_data) {
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/* Build a media packet, and add an RTP header if required. */
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if (add_rtp_header) {
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+ if (p_data->apiwrite.p_buf->offset < AVDT_MEDIA_HDR_SIZE) {
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+ android_errorWriteWithInfoLog(0x534e4554, "242535997", -1, NULL, 0);
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+ return;
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+ }
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+
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ssrc = avdt_scb_gen_ssrc(p_scb);
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p_data->apiwrite.p_buf->len += AVDT_MEDIA_HDR_SIZE;
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