DivestOS/Patches/LineageOS-15.1/android_system_bt/365979.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Hui Peng <phui@google.com>
Date: Tue, 16 May 2023 21:24:07 +0000
Subject: [PATCH] Fix an integer overflow bug in avdt_msg_asmbl
This is a backport of
Iaa4d603921fc4ffb8cfb5783f99ec0963affd6a2
to rvc-dev
Bug: 280633699
Test: manual
Ignore-AOSP-First: security
Tag: #security
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:26347d4bdba646bbba4d27337d2888a04de42639)
Merged-In: Iaa4d603921fc4ffb8cfb5783f99ec0963affd6a2
Change-Id: Iaa4d603921fc4ffb8cfb5783f99ec0963affd6a2
---
stack/avdt/avdt_msg.cc | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/stack/avdt/avdt_msg.cc b/stack/avdt/avdt_msg.cc
index b6a952bcf..b5f512a03 100644
--- a/stack/avdt/avdt_msg.cc
+++ b/stack/avdt/avdt_msg.cc
@@ -1261,14 +1261,14 @@ BT_HDR* avdt_msg_asmbl(tAVDT_CCB* p_ccb, BT_HDR* p_buf) {
* NOTE: The buffer is allocated above at the beginning of the
* reassembly, and is always of size BT_DEFAULT_BUFFER_SIZE.
*/
- uint16_t buf_len = BT_DEFAULT_BUFFER_SIZE - sizeof(BT_HDR);
+ size_t buf_len = BT_DEFAULT_BUFFER_SIZE - sizeof(BT_HDR);
/* adjust offset and len of fragment for header byte */
p_buf->offset += AVDT_LEN_TYPE_CONT;
p_buf->len -= AVDT_LEN_TYPE_CONT;
/* verify length */
- if ((p_ccb->p_rx_msg->offset + p_buf->len) > buf_len) {
+ if (((size_t) p_ccb->p_rx_msg->offset + (size_t) p_buf->len) > buf_len) {
/* won't fit; free everything */
AVDT_TRACE_WARNING("%s: Fragmented message too big!", __func__);
osi_free_and_reset((void**)&p_ccb->p_rx_msg);