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40 lines
1.5 KiB
Diff
40 lines
1.5 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: Sat, 10 Dec 2022 10:32:45 +0000
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Subject: [PATCH] Fix an OOB Write bug in gatt_check_write_long_terminate
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Bug: 258652631
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Test: manual
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Ignore-AOSP-First: security
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Merged-In: Ifffa2c7f679c4ef72dbdb6b1f3378ca506680084
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Change-Id: Ifffa2c7f679c4ef72dbdb6b1f3378ca506680084
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(cherry picked from commit d4e34d862bb1b00fd06272e34f7160b5794c73ee)
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Merged-In: Ifffa2c7f679c4ef72dbdb6b1f3378ca506680084
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---
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stack/gatt/gatt_cl.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/stack/gatt/gatt_cl.c b/stack/gatt/gatt_cl.c
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index 04a027fef..1e8ff1f50 100644
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--- a/stack/gatt/gatt_cl.c
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+++ b/stack/gatt/gatt_cl.c
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@@ -639,7 +639,8 @@ void gatt_process_prep_write_rsp (tGATT_TCB *p_tcb, tGATT_CLCB *p_clcb, UINT8 op
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GATT_TRACE_ERROR("value resp op_code = %s len = %d", gatt_dbg_op_name(op_code), len);
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- if (len < GATT_PREP_WRITE_RSP_MIN_LEN)
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+ if (len < GATT_PREP_WRITE_RSP_MIN_LEN ||
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+ len > GATT_PREP_WRITE_RSP_MIN_LEN + sizeof(value.value))
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{
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GATT_TRACE_ERROR("illegal prepare write response length, discard");
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gatt_end_operation(p_clcb, GATT_INVALID_PDU, &value);
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@@ -649,7 +650,7 @@ void gatt_process_prep_write_rsp (tGATT_TCB *p_tcb, tGATT_CLCB *p_clcb, UINT8 op
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STREAM_TO_UINT16 (value.handle, p);
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STREAM_TO_UINT16 (value.offset, p);
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- value.len = len - 4;
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+ value.len = len - GATT_PREP_WRITE_RSP_MIN_LEN;
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memcpy (value.value, p, value.len);
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