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https://github.com/Divested-Mobile/DivestOS-Build.git
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33 lines
1.3 KiB
Diff
33 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: William Escande <wescande@google.com>
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Date: Mon, 2 May 2022 09:48:59 -0700
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Subject: [PATCH] Check Avrcp packet vendor length before extracting length
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Bug: 205571133
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Test: build + ag/18105403 for sts test
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Ignore-AOSP-First: Security vulnerability
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Change-Id: Ic9fa9400ab15785cfdb251af66b1867daf09570e
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(cherry picked from commit 003e42896493afb7a0cd7406720987725d4e9da3)
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Merged-In: Ic9fa9400ab15785cfdb251af66b1867daf09570e
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---
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stack/avrc/avrc_pars_tg.cc | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/stack/avrc/avrc_pars_tg.cc b/stack/avrc/avrc_pars_tg.cc
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index 88b8d0083..7042f4da7 100644
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--- a/stack/avrc/avrc_pars_tg.cc
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+++ b/stack/avrc/avrc_pars_tg.cc
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@@ -44,6 +44,12 @@ static tAVRC_STS avrc_ctrl_pars_vendor_cmd(tAVRC_MSG_VENDOR* p_msg,
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tAVRC_COMMAND* p_result) {
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tAVRC_STS status = AVRC_STS_NO_ERROR;
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+ if (p_msg->vendor_len < 4) { // 4 == pdu + reserved byte + len as uint16
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+ AVRC_TRACE_WARNING("%s: message length %d too short: must be at least 4",
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+ __func__, p_msg->vendor_len);
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+ android_errorWriteLog(0x534e4554, "205571133");
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+ return AVRC_STS_INTERNAL_ERR;
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+ }
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uint8_t* p = p_msg->p_vendor_data;
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p_result->pdu = *p++;
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AVRC_TRACE_DEBUG("%s pdu:0x%x", __func__, p_result->pdu);
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