From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Ted Wang Date: Thu, 4 Aug 2022 09:41:24 +0800 Subject: [PATCH] Add length check when copy AVDTP packet Bug: 232023771 Test: make Tag: #security Ignore-AOSP-First: Security Change-Id: I68dd78c747eeafee5190dc56d7c71e9eeed08a5b Merged-In: I68dd78c747eeafee5190dc56d7c71e9eeed08a5b (cherry picked from commit 07cc1fe9b4523f95c13c247a795bdf0b36a1aa4f) Merged-In: I68dd78c747eeafee5190dc56d7c71e9eeed08a5b --- stack/avdt/avdt_msg.cc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/stack/avdt/avdt_msg.cc b/stack/avdt/avdt_msg.cc index 52ce2e8a6..5dbe79bc5 100644 --- a/stack/avdt/avdt_msg.cc +++ b/stack/avdt/avdt_msg.cc @@ -1223,6 +1223,10 @@ BT_HDR* avdt_msg_asmbl(tAVDT_CCB* p_ccb, BT_HDR* p_buf) { * would have allocated smaller buffer. */ p_ccb->p_rx_msg = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE); + if (sizeof(BT_HDR) + p_buf->offset + p_buf->len > BT_DEFAULT_BUFFER_SIZE) { + android_errorWriteLog(0x534e4554, "232023771"); + return NULL; + } memcpy(p_ccb->p_rx_msg, p_buf, sizeof(BT_HDR) + p_buf->offset + p_buf->len); /* Free original buffer */