mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-30 01:46:30 -05:00
49 lines
1.8 KiB
Diff
49 lines
1.8 KiB
Diff
From fae242db5e1943ba878b4fb215fe6e7f1c387a20 Mon Sep 17 00:00:00 2001
|
|
From: Tony Truong <truong@codeaurora.org>
|
|
Date: Fri, 6 Jan 2017 14:03:03 -0800
|
|
Subject: msm: pcie: add bounds check for debugfs register write
|
|
|
|
Via debugfs nodes, users have the option to read and write to
|
|
any PCIe register. To ensure clients do not access registers
|
|
outside the PCIe range, add checks to validate the offset clients
|
|
provide.
|
|
|
|
Bug: 33039685
|
|
Change-Id: Ia35cd04c57f01c21a47962be596bca395b5ca247
|
|
Signed-off-by: Tony Truong <truong@codeaurora.org>
|
|
---
|
|
drivers/pci/host/pci-msm.c | 13 ++++++++++---
|
|
1 file changed, 10 insertions(+), 3 deletions(-)
|
|
|
|
diff --git a/drivers/pci/host/pci-msm.c b/drivers/pci/host/pci-msm.c
|
|
index 1b80fa1..ffaa059 100644
|
|
--- a/drivers/pci/host/pci-msm.c
|
|
+++ b/drivers/pci/host/pci-msm.c
|
|
@@ -1,4 +1,4 @@
|
|
-/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
|
|
+/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
@@ -1691,8 +1691,15 @@ static void msm_pcie_sel_debug_testcase(struct msm_pcie_dev_t *dev,
|
|
dev->res[base_sel - 1].base,
|
|
wr_offset, wr_mask, wr_value);
|
|
|
|
- msm_pcie_write_reg_field(dev->res[base_sel - 1].base,
|
|
- wr_offset, wr_mask, wr_value);
|
|
+ base_sel_size = resource_size(dev->res[base_sel - 1].resource);
|
|
+
|
|
+ if (wr_offset > base_sel_size - 4 ||
|
|
+ msm_pcie_check_align(dev, wr_offset))
|
|
+ pr_alert("PCIe: RC%d: Invalid wr_offset: 0x%x. wr_offset should be no more than 0x%x\n",
|
|
+ dev->rc_idx, wr_offset, base_sel_size - 4);
|
|
+ else
|
|
+ msm_pcie_write_reg_field(dev->res[base_sel - 1].base,
|
|
+ wr_offset, wr_mask, wr_value);
|
|
|
|
break;
|
|
case 13: /* dump all registers of base_sel */
|
|
--
|
|
cgit v1.1
|
|
|