This is a note to let you know that I've just added the patch titled
i2c: fix kernel memory disclosure in dev interface
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i2c-fix-kernel-memory-disclosure-in-dev-interface.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 30f939feaeee23e21391cfc7b484f012eb189c3c Mon Sep 17 00:00:00 2001
From: Vlad Tsyrklevich <vlad@xxxxxxxxxxxxxxx>
Date: Mon, 9 Jan 2017 22:53:36 +0700
Subject: i2c: fix kernel memory disclosure in dev interface
From: Vlad Tsyrklevich <vlad@xxxxxxxxxxxxxxx>
commit 30f939feaeee23e21391cfc7b484f012eb189c3c upstream.
i2c_smbus_xfer() does not always fill an entire block, allowing
kernel stack memory disclosure through the temp variable. Clear
it before it's read to.
Signed-off-by: Vlad Tsyrklevich <vlad@xxxxxxxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/i2c-dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -331,7 +331,7 @@ static noinline int i2cdev_ioctl_smbus(s
unsigned long arg)
{
struct i2c_smbus_ioctl_data data_arg;
- union i2c_smbus_data temp;
+ union i2c_smbus_data temp = {};
int datasize, res;
if (copy_from_user(&data_arg,
Patches currently in stable-queue which might be from vlad@xxxxxxxxxxxxxxx are
queue-4.9/i2c-fix-kernel-memory-disclosure-in-dev-interface.patch
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