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41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Venkata Jagadeesh Garaga <quic_vgaraga@quicinc.com>
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Date: Tue, 22 Mar 2022 13:35:43 +0530
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Subject: [PATCH] Fix OOB in reassemble_and_dispatch
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Fix OOB while reading L2cap length in HCI pkt
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Change-Id: I7f32b171e8c68b9724f95fcf2327959539e2d0d5
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CRs-Fixed: 3155132
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---
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hci/src/packet_fragmenter.cc | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/hci/src/packet_fragmenter.cc b/hci/src/packet_fragmenter.cc
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index 4c8906e38..eeaf52b30 100644
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--- a/hci/src/packet_fragmenter.cc
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+++ b/hci/src/packet_fragmenter.cc
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@@ -123,12 +123,10 @@ static void reassemble_and_dispatch(UNUSED_ATTR BT_HDR* packet) {
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if ((packet->event & MSG_EVT_MASK) == MSG_HC_TO_STACK_HCI_ACL) {
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uint8_t* stream = packet->data;
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uint16_t handle;
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- uint16_t l2cap_length;
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uint16_t acl_length;
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STREAM_TO_UINT16(handle, stream);
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STREAM_TO_UINT16(acl_length, stream);
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- STREAM_TO_UINT16(l2cap_length, stream);
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CHECK(acl_length == packet->len - HCI_ACL_PREAMBLE_SIZE);
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@@ -163,6 +161,9 @@ static void reassemble_and_dispatch(UNUSED_ATTR BT_HDR* packet) {
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return;
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}
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+ uint16_t l2cap_length;
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+ STREAM_TO_UINT16(l2cap_length, stream);
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+
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uint16_t full_length =
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l2cap_length + L2CAP_HEADER_SIZE + HCI_ACL_PREAMBLE_SIZE;
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