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https://github.com/Divested-Mobile/DivestOS-Build.git
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42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
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From ab3f46119ca10de87a11fe966b0723c48f27acd4 Mon Sep 17 00:00:00 2001
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From: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
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Date: Wed, 30 Mar 2016 17:12:16 +0530
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Subject: msm: limits: Check user buffer size before copying to local buffer
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User input data is passed in from userspace through debugfs interface
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of supply lm core to validate supply lm core functionality. Ensure
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user buffer size is not greater than expected stack buffer size
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to avoid out of bounds array accesses.
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Change-Id: I5a93774855241b50895c5e2b3ff939e4c33a0185
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Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
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---
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drivers/thermal/supply_lm_core.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/drivers/thermal/supply_lm_core.c b/drivers/thermal/supply_lm_core.c
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index fc8e807..a4d137f 100644
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--- a/drivers/thermal/supply_lm_core.c
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+++ b/drivers/thermal/supply_lm_core.c
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@@ -1,4 +1,4 @@
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-/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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+/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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@@ -303,6 +303,11 @@ static ssize_t supply_lm_input_write(struct file *fp,
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enum corner_state gpu;
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enum corner_state modem;
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+ if (count > (MODE_MAX - 1)) {
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+ pr_err("Invalid user input\n");
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+ return -EINVAL;
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+ }
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+
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if (copy_from_user(&buf, user_buffer, count))
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return -EFAULT;
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--
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cgit v1.1
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