net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()

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[ Upstream commit 51fe0a4705 ]

rules 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
rules to avoid OOB writing or NULL pointer dereference.

Fixes: 90b509b39a ("net: mvpp2: cls: Add Classification offload support")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Reviewed-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Hangyu Hua 2023-09-08 14:19:49 +08:00 • committed by Greg Kroah-Hartman

parent 06b4934ab2

commit 5bb09dddc7

1 changed files with 5 additions and 0 deletions

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drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c

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