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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)
committerDavid S. Miller <davem@davemloft.net>
Thu, 15 Oct 2015 02:00:20 +0000 (19:00 -0700)
commit077cb37fcf6f00a45f375161200b5ee0cd4e937b
tree28e5684447aa0ca07b63a2c66e3bb8f29e7139f5tree | snapshot (tar.gz zip)
parentef41a2cedb14871203ee28d7a5cb5aafe4e97439commit | diff
ethtool: Use kcalloc instead of kmalloc for ethtool_get_strings

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>
net/core/ethtool.c diff | blob | blame | history