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ethtool: Use kcalloc instead of kmalloc for ethtool_get_strings
authorJoe Perches <joe@perches.com>
Wed, 14 Oct 2015 08:09:40 +0000 (01:09 -0700)
committerBen Hutchings <ben@decadent.org.uk>
Tue, 17 Nov 2015 15:54:46 +0000 (15:54 +0000)
commit68c3e59aa9cdf2d8870d8fbe4f37b1a509d0abeb
treea170c553056e172924f4cdbc7dbe05e7802e8476tree | snapshot
parenta5e14d9fd0d6c7696207e95468ef01f790556a29commit | diff
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>
net/core/ethtool.c diff | blob | history
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