This is a note to let you know that I've just added the patch titled
ethtool: Use kcalloc instead of kmalloc for ethtool_get_strings
to the 4.2-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:
ethtool-use-kcalloc-instead-of-kmalloc-for-ethtool_get_strings.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Oct 22 17:25:24 PDT 2015
From: Joe Perches <joe@xxxxxxxxxxx>
Date: Wed, 14 Oct 2015 01:09:40 -0700
Subject: ethtool: Use kcalloc instead of kmalloc for ethtool_get_strings
From: Joe Perches <joe@xxxxxxxxxxx>
[ 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@xxxxxxxxxxx>
Acked-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/ethtool.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1284,7 +1284,7 @@ static int ethtool_get_strings(struct ne
gstrings.len = ret;
- data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
+ data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
if (!data)
return -ENOMEM;
Patches currently in stable-queue which might be from joe@xxxxxxxxxxx are
queue-4.2/ethtool-use-kcalloc-instead-of-kmalloc-for-ethtool_get_strings.patch
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