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https://github.com/Divested-Mobile/DivestOS-Build.git
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49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
From 6298a474322fb2182f795a622b2faa64abfd8474 Mon Sep 17 00:00:00 2001
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From: Xiaoyu Ye <benyxy@codeaurora.org>
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Date: Wed, 7 Dec 2016 16:35:07 -0800
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Subject: drivers: soc: qcom: Add error handling in function avtimer_ioctl
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Error handling is added to prevent garbage value being passed to
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user space by the uninitialized local variable avtimer_tick.
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CRs-Fixed: 1097878
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Change-Id: I3f895deaae3acf329088cf8135859cc41e781763
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Signed-off-by: Xiaoyu Ye <benyxy@codeaurora.org>
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---
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drivers/platform/msm/avtimer.c | 14 +++++++++++---
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1 file changed, 11 insertions(+), 3 deletions(-)
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diff --git a/drivers/platform/msm/avtimer.c b/drivers/platform/msm/avtimer.c
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index 2bded5e..4331af8 100644
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--- a/drivers/platform/msm/avtimer.c
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+++ b/drivers/platform/msm/avtimer.c
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@@ -1,4 +1,4 @@
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-/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
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+/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
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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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@@ -331,9 +331,17 @@ static long avtimer_ioctl(struct file *file, unsigned int ioctl_num,
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switch (ioctl_num) {
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case IOCTL_GET_AVTIMER_TICK:
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{
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- uint64_t avtimer_tick;
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+ uint64_t avtimer_tick = 0;
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+ int rc;
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+
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+ rc = avcs_core_query_timer(&avtimer_tick);
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+
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+ if (rc) {
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+ pr_err("%s: Error: Invalid AV Timer tick, rc = %d\n",
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+ __func__, rc);
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+ return rc;
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+ }
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- avcs_core_query_timer(&avtimer_tick);
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pr_debug_ratelimited("%s: AV Timer tick: time %llx\n",
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__func__, avtimer_tick);
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if (copy_to_user((void *) ioctl_param, &avtimer_tick,
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--
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cgit v1.1
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