mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-08-30 22:21:55 +00:00
101 lines
4.5 KiB
Diff
101 lines
4.5 KiB
Diff
![]() |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
||
|
From: Rocky Liao <quic_rjliao@quicinc.com>
|
||
|
Date: Mon, 19 Sep 2022 17:39:42 +0800
|
||
|
Subject: [PATCH] AVRCP: Fix potential buffer overflow
|
||
|
|
||
|
There will be buffer overflow if remote response exceeds
|
||
|
AVRC_MAX_APP_ATTR_SIZE, add array index check to avoid
|
||
|
buffer overflow issue.
|
||
|
|
||
|
CRs-fixed: 3278869
|
||
|
Change-Id: Ia93690e0dc4b28fd01af3a406678d43d426d3be8
|
||
|
---
|
||
|
btif/src/btif_rc.cc | 24 +++++++++++++++---------
|
||
|
1 file changed, 15 insertions(+), 9 deletions(-)
|
||
|
|
||
|
diff --git a/btif/src/btif_rc.cc b/btif/src/btif_rc.cc
|
||
|
index 0b34f7c36..a0e38998f 100644
|
||
|
--- a/btif/src/btif_rc.cc
|
||
|
+++ b/btif/src/btif_rc.cc
|
||
|
@@ -5067,13 +5067,13 @@ static void handle_app_attr_txt_response(tBTA_AV_META_MSG* pmeta_msg,
|
||
|
* for standard attributes.
|
||
|
*/
|
||
|
p_app_settings->num_ext_attrs = 0;
|
||
|
- for (xx = 0; xx < p_app_settings->ext_attr_index; xx++) {
|
||
|
+ for (xx = 0; xx < p_app_settings->ext_attr_index && xx < AVRC_MAX_APP_ATTR_SIZE; xx++) {
|
||
|
osi_free_and_reset((void**)&p_app_settings->ext_attrs[xx].p_str);
|
||
|
}
|
||
|
p_app_settings->ext_attr_index = 0;
|
||
|
|
||
|
if (p_dev) {
|
||
|
- for (xx = 0; xx < p_app_settings->num_attrs; xx++) {
|
||
|
+ for (xx = 0; xx < p_app_settings->num_attrs && xx < AVRC_MAX_APP_ATTR_SIZE; xx++) {
|
||
|
attrs[xx] = p_app_settings->attrs[xx].attr_id;
|
||
|
}
|
||
|
|
||
|
@@ -5086,7 +5086,7 @@ static void handle_app_attr_txt_response(tBTA_AV_META_MSG* pmeta_msg,
|
||
|
|
||
|
for (xx = 0; xx < p_rsp->num_attr; xx++) {
|
||
|
uint8_t x;
|
||
|
- for (x = 0; x < p_app_settings->num_ext_attrs; x++) {
|
||
|
+ for (x = 0; x < p_app_settings->num_ext_attrs && x < AVRC_MAX_APP_ATTR_SIZE; x++) {
|
||
|
if (p_app_settings->ext_attrs[x].attr_id == p_rsp->p_attrs[xx].attr_id) {
|
||
|
p_app_settings->ext_attrs[x].charset_id = p_rsp->p_attrs[xx].charset_id;
|
||
|
p_app_settings->ext_attrs[x].str_len = p_rsp->p_attrs[xx].str_len;
|
||
|
@@ -5096,7 +5096,7 @@ static void handle_app_attr_txt_response(tBTA_AV_META_MSG* pmeta_msg,
|
||
|
}
|
||
|
}
|
||
|
|
||
|
- for (xx = 0; xx < p_app_settings->ext_attrs[0].num_val; xx++) {
|
||
|
+ for (xx = 0; xx < p_app_settings->ext_attrs[0].num_val && xx < BTRC_MAX_APP_ATTR_SIZE; xx++) {
|
||
|
vals[xx] = p_app_settings->ext_attrs[0].ext_attr_val[xx].val;
|
||
|
}
|
||
|
get_player_app_setting_value_text_cmd(vals, xx, p_dev);
|
||
|
@@ -5141,11 +5141,11 @@ static void handle_app_attr_val_txt_response(
|
||
|
* for standard attributes.
|
||
|
*/
|
||
|
p_app_settings->num_ext_attrs = 0;
|
||
|
- for (xx = 0; xx < p_app_settings->ext_attr_index; xx++) {
|
||
|
+ for (xx = 0; xx < p_app_settings->ext_attr_index && xx < AVRC_MAX_APP_ATTR_SIZE; xx++) {
|
||
|
int x;
|
||
|
btrc_player_app_ext_attr_t* p_ext_attr = &p_app_settings->ext_attrs[xx];
|
||
|
|
||
|
- for (x = 0; x < p_ext_attr->num_val; x++)
|
||
|
+ for (x = 0; x < p_ext_attr->num_val && x < BTRC_MAX_APP_ATTR_SIZE; x++)
|
||
|
osi_free_and_reset((void**)&p_ext_attr->ext_attr_val[x].p_str);
|
||
|
p_ext_attr->num_val = 0;
|
||
|
osi_free_and_reset((void**)&p_app_settings->ext_attrs[xx].p_str);
|
||
|
@@ -5162,11 +5162,17 @@ static void handle_app_attr_val_txt_response(
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
+ if (p_app_settings->ext_val_index >= AVRC_MAX_APP_ATTR_SIZE) {
|
||
|
+ BTIF_TRACE_ERROR("%s: ext_val_index is 0x%02x, overflow!",
|
||
|
+ __func__, p_app_settings->ext_val_index);
|
||
|
+ return;
|
||
|
+ }
|
||
|
+
|
||
|
for (xx = 0; xx < p_rsp->num_attr; xx++) {
|
||
|
uint8_t x;
|
||
|
btrc_player_app_ext_attr_t* p_ext_attr;
|
||
|
p_ext_attr = &p_app_settings->ext_attrs[p_app_settings->ext_val_index];
|
||
|
- for (x = 0; x < p_rsp->num_attr; x++) {
|
||
|
+ for (x = 0; x < p_rsp->num_attr && x < BTRC_MAX_APP_ATTR_SIZE; x++) {
|
||
|
if (p_ext_attr->ext_attr_val[x].val == p_rsp->p_attrs[xx].attr_id) {
|
||
|
p_ext_attr->ext_attr_val[x].charset_id = p_rsp->p_attrs[xx].charset_id;
|
||
|
p_ext_attr->ext_attr_val[x].str_len = p_rsp->p_attrs[xx].str_len;
|
||
|
@@ -5204,11 +5210,11 @@ static void handle_app_attr_val_txt_response(
|
||
|
/* Free the application settings information after sending to
|
||
|
* application.
|
||
|
*/
|
||
|
- for (xx = 0; xx < p_app_settings->ext_attr_index; xx++) {
|
||
|
+ for (xx = 0; xx < p_app_settings->ext_attr_index && xx < AVRC_MAX_APP_ATTR_SIZE; xx++) {
|
||
|
int x;
|
||
|
btrc_player_app_ext_attr_t* p_ext_attr = &p_app_settings->ext_attrs[xx];
|
||
|
|
||
|
- for (x = 0; x < p_ext_attr->num_val; x++)
|
||
|
+ for (x = 0; x < p_ext_attr->num_val && x < BTRC_MAX_APP_ATTR_SIZE; x++)
|
||
|
osi_free_and_reset((void**)&p_ext_attr->ext_attr_val[x].p_str);
|
||
|
p_ext_attr->num_val = 0;
|
||
|
osi_free_and_reset((void**)&p_app_settings->ext_attrs[xx].p_str);
|