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net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in …
…mtk_hwlro_get_fdir_all() [ Upstream commit e4c7981 ] rule_locs is allocated in ethtool_get_rxnfc and the size is determined by rule_cnt from user space. So rule_cnt needs to be check before using rule_locs to avoid NULL pointer dereference. Fixes: 7aab747 ("net: ethernet: mediatek: add ethtool functions to configure RX flows of HW LRO") Signed-off-by: Hangyu Hua <hbh25y@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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