linux-kernel - [PATCH] hpet: Fix a small information leak

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Message-Id: <20200512061424.28381-1-allen.lkml@gmail.com>
Date:   Tue, 12 May 2020 11:44:24 +0530
From:   Allen Pais <allen.lkml@...il.com>
To:     clemens@...isch.de
Cc:     linux-kernel@...r.kernel.org, Allen Pais <allen.lkml@...il.com>
Subject: [PATCH] hpet: Fix a small information leak

 hpet_info has a hole in it cause of which
we might end up leaking a few bytes.

 Zero them with memset().
Fixes: 54066a57c584 ("hpet: kill BKL, add compat_ioctl")
Signed-off-by: Allen Pais <allen.lkml@...il.com>
---
 drivers/char/hpet.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index ed3b7dab678d..d9592eb24635 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -667,6 +667,7 @@ hpet_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	struct hpet_info info;
 	int err;
 
+	memset(&info, 0, sizeof(info));
 	mutex_lock(&hpet_mutex);
 	err = hpet_ioctl_common(file->private_data, cmd, arg, &info);
 	mutex_unlock(&hpet_mutex);
-- 
2.17.1