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38 lines
1.2 KiB
Diff
38 lines
1.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Hui Peng <phui@google.com>
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Date: Wed, 29 Nov 2023 18:23:53 +0000
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Subject: [PATCH] Fix an OOB write bug in attp_build_read_by_type_value_cmd
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This is a backport of I2a95bbcce9a16ac84dd714eb4561428711a9872e
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Bug: 297524203
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Test: m com.android.btservices
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Ignore-AOSP-First: security
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9cdac321797cbe8214bc3f6294ca9a71a4be07a7)
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Merged-In: I8c5daedb1605307df697ea5d875153dfcf3f5181
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Change-Id: I8c5daedb1605307df697ea5d875153dfcf3f5181
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---
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stack/gatt/att_protocol.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/stack/gatt/att_protocol.c b/stack/gatt/att_protocol.c
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index e09636220..1e9948185 100644
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--- a/stack/gatt/att_protocol.c
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+++ b/stack/gatt/att_protocol.c
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@@ -156,7 +156,14 @@ BT_HDR *attp_build_read_by_type_value_cmd (UINT16 payload_size, tGATT_FIND_TYPE_
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{
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UINT8 *p;
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UINT16 len = p_value_type->value_len;
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- BT_HDR *p_buf =
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+ BT_HDR *p_buf = NULL;
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+
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+ if (payload_size < 5)
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+ {
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+ return NULL;
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+ }
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+
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+ p_buf =
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(BT_HDR *)osi_malloc(sizeof(BT_HDR) + payload_size + L2CAP_MIN_OFFSET);
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p = (UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET;
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