mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-14 18:34:30 -05:00
65 lines
2.6 KiB
Diff
65 lines
2.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Brian Delwiche <delwiche@google.com>
|
|
Date: Fri, 19 May 2023 19:17:16 +0000
|
|
Subject: [PATCH] Fix integer overflow in build_read_multi_rsp
|
|
|
|
Local variables tracking structure size in build_read_multi_rsp are of
|
|
uint16 type but accept a full uint16 range from function arguments while
|
|
appending a fixed-length offset. This can lead to an integer overflow
|
|
and unexpected behavior.
|
|
|
|
Change the locals to size_t, and add a check during reasssignment.
|
|
|
|
Bug: 273966636
|
|
Test: atest bluetooth_test_gd_unit, net_test_stack_btm
|
|
Tag: #security
|
|
Ignore-AOSP-First: Security
|
|
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:53f64274cbf2268ad6db5af9c61ceead9ef64fb0)
|
|
Merged-In: Iff252f0dd06aac9776e8548631e0b700b3ed85b9
|
|
Change-Id: Iff252f0dd06aac9776e8548631e0b700b3ed85b9
|
|
---
|
|
stack/gatt/gatt_sr.cc | 17 ++++++++++++-----
|
|
1 file changed, 12 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/stack/gatt/gatt_sr.cc b/stack/gatt/gatt_sr.cc
|
|
index f9e8f537f..1b9988739 100644
|
|
--- a/stack/gatt/gatt_sr.cc
|
|
+++ b/stack/gatt/gatt_sr.cc
|
|
@@ -111,7 +111,8 @@ void gatt_dequeue_sr_cmd(tGATT_TCB& tcb) {
|
|
******************************************************************************/
|
|
static bool process_read_multi_rsp(tGATT_SR_CMD* p_cmd, tGATT_STATUS status,
|
|
tGATTS_RSP* p_msg, uint16_t mtu) {
|
|
- uint16_t ii, total_len, len;
|
|
+ uint16_t ii;
|
|
+ size_t total_len, len;
|
|
uint8_t* p;
|
|
bool is_overflow = false;
|
|
|
|
@@ -166,16 +167,22 @@ static bool process_read_multi_rsp(tGATT_SR_CMD* p_cmd, tGATT_STATUS status,
|
|
len = p_rsp->attr_value.len - (total_len - mtu);
|
|
is_overflow = true;
|
|
VLOG(1) << StringPrintf(
|
|
- "multi read overflow available len=%d val_len=%d", len,
|
|
+ "multi read overflow available len=%zu val_len=%d", len,
|
|
p_rsp->attr_value.len);
|
|
} else {
|
|
len = p_rsp->attr_value.len;
|
|
}
|
|
|
|
if (p_rsp->attr_value.handle == p_cmd->multi_req.handles[ii]) {
|
|
- memcpy(p, p_rsp->attr_value.value, len);
|
|
- if (!is_overflow) p += len;
|
|
- p_buf->len += len;
|
|
+ // check for possible integer overflow
|
|
+ if (p_buf->len + len <= UINT16_MAX) {
|
|
+ memcpy(p, p_rsp->attr_value.value, len);
|
|
+ if (!is_overflow) p += len;
|
|
+ p_buf->len += len;
|
|
+ } else {
|
|
+ p_cmd->status = GATT_NOT_FOUND;
|
|
+ break;
|
|
+ }
|
|
} else {
|
|
p_cmd->status = GATT_NOT_FOUND;
|
|
break;
|