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34 lines
1.2 KiB
Diff
34 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.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/stack/avdt/avdt_scb_act.c b/stack/avdt/avdt_scb_act.c
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index f61abd626..5537c3d1d 100644
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--- a/stack/avdt/avdt_scb_act.c
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+++ b/stack/avdt/avdt_scb_act.c
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@@ -1295,6 +1295,12 @@ void avdt_scb_hdl_write_req_no_frag(tAVDT_SCB *p_scb, tAVDT_SCB_EVT *p_data)
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/* Add RTP header if required */
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if ( !(p_data->apiwrite.opt & AVDT_DATA_OPT_NO_RTP) )
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{
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+ if (p_data->apiwrite.p_buf->offset < AVDT_MEDIA_HDR_SIZE)
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+ {
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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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