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29 lines
999 B
Diff
29 lines
999 B
Diff
From 19384322b5b51987bd6037f7a6b18a62a5d4d654 Mon Sep 17 00:00:00 2001
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From: Jianqiang Zhao <zhaojianqiang1@gmail.com>
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Date: Mon, 6 Mar 2017 16:33:42 +0800
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Subject: [PATCH] ANDROID: input: keychord: fix race condition bug
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Change-Id: I9c7c759c99e21cad9a7f9a09128122bf6ae11302
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Signed-off-by: Jianqiang Zhao <zhaojianqiang1@gmail.com>
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Bug: 36006779
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---
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drivers/input/misc/keychord.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/drivers/input/misc/keychord.c b/drivers/input/misc/keychord.c
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index a5ea27ad0e16c..f580edf1c87ce 100644
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--- a/drivers/input/misc/keychord.c
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+++ b/drivers/input/misc/keychord.c
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@@ -300,8 +300,10 @@ static ssize_t keychord_write(struct file *file, const char __user *buffer,
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ret = input_register_handler(&kdev->input_handler);
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if (ret) {
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- kfree(keychords);
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+ spin_lock_irqsave(&kdev->lock, flags);
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+ kfree(kdev->keychords);
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kdev->keychords = 0;
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+ spin_unlock_irqrestore(&kdev->lock, flags);
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return ret;
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}
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kdev->registered = 1;
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