mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-10-01 01:35:54 -04:00
202033c013
This adds 3 expat patches for n-asb-2022-09 from https://github.com/syphyr/android_external_expat/commits/cm-14.1 and also applies 2 of them to 15.1 Signed-off-by: Tad <tad@spotco.us>
120 lines
4.6 KiB
Diff
120 lines
4.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Chienyuan <chienyuanhuang@google.com>
|
|
Date: Tue, 12 Feb 2019 16:01:00 +0800
|
|
Subject: [PATCH] Fix OOB in bnep_is_packet_allowed
|
|
|
|
Bug: 112050983
|
|
Test: PoC
|
|
Change-Id: I5d331f46cdba86c8e61de206a2ede1d2b348d7e4
|
|
(cherry picked from commit 230f252b8a1a1073ec1a4081545b2ff62393d16d)
|
|
CRs-Fixed: 3155069
|
|
---
|
|
stack/bnep/bnep_api.c | 15 +++++++++++++--
|
|
stack/bnep/bnep_int.h | 2 +-
|
|
stack/bnep/bnep_utils.c | 13 ++++++++++++-
|
|
3 files changed, 26 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/stack/bnep/bnep_api.c b/stack/bnep/bnep_api.c
|
|
index dc349299a..e1c9f2e3d 100644
|
|
--- a/stack/bnep/bnep_api.c
|
|
+++ b/stack/bnep/bnep_api.c
|
|
@@ -387,7 +387,8 @@ tBNEP_RESULT BNEP_WriteBuf (UINT16 handle,
|
|
|
|
/* Check if the packet should be filtered out */
|
|
p_data = (UINT8 *)(p_buf + 1) + p_buf->offset;
|
|
- if (bnep_is_packet_allowed (p_bcb, p_dest_addr, protocol, fw_ext_present, p_data) != BNEP_SUCCESS)
|
|
+ if (bnep_is_packet_allowed (p_bcb, p_dest_addr, protocol, fw_ext_present,
|
|
+ p_data, p_buf->len) != BNEP_SUCCESS)
|
|
{
|
|
/*
|
|
** If packet is filtered and ext headers are present
|
|
@@ -401,6 +402,11 @@ tBNEP_RESULT BNEP_WriteBuf (UINT16 handle,
|
|
org_len = p_buf->len;
|
|
new_len = 0;
|
|
do {
|
|
+ if ((new_len + 2) > org_len)
|
|
+ {
|
|
+ osi_free(p_buf);
|
|
+ return BNEP_IGNORE_CMD;
|
|
+ }
|
|
|
|
ext = *p_data++;
|
|
length = *p_data++;
|
|
@@ -505,7 +511,8 @@ tBNEP_RESULT BNEP_Write (UINT16 handle,
|
|
p_bcb = &(bnep_cb.bcb[handle - 1]);
|
|
|
|
/* Check if the packet should be filtered out */
|
|
- if (bnep_is_packet_allowed (p_bcb, p_dest_addr, protocol, fw_ext_present, p_data) != BNEP_SUCCESS)
|
|
+ if (bnep_is_packet_allowed (p_bcb, p_dest_addr, protocol, fw_ext_present,
|
|
+ p_data, len) != BNEP_SUCCESS)
|
|
{
|
|
/*
|
|
** If packet is filtered and ext headers are present
|
|
@@ -520,6 +527,10 @@ tBNEP_RESULT BNEP_Write (UINT16 handle,
|
|
new_len = 0;
|
|
p = p_data;
|
|
do {
|
|
+ if ((new_len + 2) > org_len)
|
|
+ {
|
|
+ return BNEP_IGNORE_CMD;
|
|
+ }
|
|
|
|
ext = *p_data++;
|
|
length = *p_data++;
|
|
diff --git a/stack/bnep/bnep_int.h b/stack/bnep/bnep_int.h
|
|
index 126be04fe..b10098122 100644
|
|
--- a/stack/bnep/bnep_int.h
|
|
+++ b/stack/bnep/bnep_int.h
|
|
@@ -236,7 +236,7 @@ extern UINT8 *bnep_process_control_packet (tBNEP_CONN *p_bcb, UINT8 *p, UI
|
|
extern void bnep_sec_check_complete (BD_ADDR bd_addr, tBT_TRANSPORT trasnport,
|
|
void *p_ref_data, UINT8 result);
|
|
extern tBNEP_RESULT bnep_is_packet_allowed (tBNEP_CONN *p_bcb, BD_ADDR p_dest_addr, UINT16 protocol,
|
|
- BOOLEAN fw_ext_present, UINT8 *p_data);
|
|
+ BOOLEAN fw_ext_present, UINT8 *p_data, UINT16 org_len);
|
|
extern UINT32 bnep_get_uuid32 (tBT_UUID *src_uuid);
|
|
|
|
|
|
diff --git a/stack/bnep/bnep_utils.c b/stack/bnep/bnep_utils.c
|
|
index 65acd33f6..09f2d13c2 100644
|
|
--- a/stack/bnep/bnep_utils.c
|
|
+++ b/stack/bnep/bnep_utils.c
|
|
@@ -1336,7 +1336,7 @@ tBNEP_RESULT bnep_is_packet_allowed (tBNEP_CONN *p_bcb,
|
|
BD_ADDR p_dest_addr,
|
|
UINT16 protocol,
|
|
BOOLEAN fw_ext_present,
|
|
- UINT8 *p_data)
|
|
+ UINT8 *p_data, UINT16 org_len)
|
|
{
|
|
if (p_bcb->rcvd_num_filters)
|
|
{
|
|
@@ -1346,18 +1346,29 @@ tBNEP_RESULT bnep_is_packet_allowed (tBNEP_CONN *p_bcb,
|
|
proto = protocol;
|
|
if (proto == BNEP_802_1_P_PROTOCOL)
|
|
{
|
|
+ UINT16 new_len = 0;
|
|
if (fw_ext_present)
|
|
{
|
|
UINT8 len, ext;
|
|
/* parse the extension headers and findout actual protocol */
|
|
do {
|
|
+ if ((new_len + 2) > org_len)
|
|
+ {
|
|
+ return BNEP_IGNORE_CMD;
|
|
+ }
|
|
|
|
ext = *p_data++;
|
|
len = *p_data++;
|
|
p_data += len;
|
|
|
|
+ new_len += (len + 2);
|
|
+
|
|
} while (ext & 0x80);
|
|
}
|
|
+ if ((new_len + 4) > org_len)
|
|
+ {
|
|
+ return BNEP_IGNORE_CMD;
|
|
+ }
|
|
p_data += 2;
|
|
BE_STREAM_TO_UINT16 (proto, p_data);
|
|
}
|