tree 7805f577d019f587146b4fd1cf642faacfec2f14
parent db048b69037e7fa6a7d9e95a1271a50dc08ae233
author Ben Hutchings <bhutchings@solarflare.com> 1277714758 +0000
committer David S. Miller <davem@davemloft.net> 1277798429 -0700

ethtool: Fix potential user buffer overflow for ETHTOOL_{G, S}RXFH

struct ethtool_rxnfc was originally defined in 2.6.27 for the
ETHTOOL_{G,S}RXFH command with only the cmd, flow_type and data
fields.  It was then extended in 2.6.30 to support various additional
commands.  These commands should have been defined to use a new
structure, but it is too late to change that now.

Since user-space may still be using the old structure definition
for the ETHTOOL_{G,S}RXFH commands, and since they do not need the
additional fields, only copy the originally defined fields to and
from user-space.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Cc: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>