From 68c3e59aa9cdf2d8870d8fbe4f37b1a509d0abeb Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Wed, 14 Oct 2015 01:09:40 -0700
Subject: [PATCH] ethtool: Use kcalloc instead of kmalloc for
 ethtool_get_strings

[ Upstream commit 077cb37fcf6f00a45f375161200b5ee0cd4e937b ]

It seems that kernel memory can leak into userspace by a
kmalloc, ethtool_get_strings, then copy_to_user sequence.

Avoid this by using kcalloc to zero fill the copied buffer.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
Reading git-format-patch failed