From: Jakub Kicinski <kuba@kernel.org>
To: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
kernel@pengutronix.de, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org,
Maxime Chevallier <maxime.chevallier@bootlin.com>,
lst@pengutronix.de
Subject: Re: [PATCH net-next v4 0/4] net: selftest: improve test string formatting and checksum handling
Date: Fri, 11 Jul 2025 15:36:05 -0700 [thread overview]
Message-ID: <20250711153605.4c13b166@kernel.org> (raw)
In-Reply-To: <20250711-copper-dragonfly-of-realization-f92247-mkl@pengutronix.de>
On Fri, 11 Jul 2025 10:42:52 +0200 Marc Kleine-Budde wrote:
> Is passing packets with known bad checksums to the networking stack with
> CHECKSUM_NONE, so that the checksum is recalculated in software a
> potential DoS vector?
I'm not aware of it being a DoS vector. We're talking about a basic
arithmetic sum here, not a CRC or anything math-intensive. So if we
assume the CPU is fast enough to copy this data via the socket API
to user space it is definitely fast enough to add it up and drop
a packet.
prev parent reply other threads:[~2025-07-11 22:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-15 8:30 [PATCH net-next v4 0/4] net: selftest: improve test string formatting and checksum handling Oleksij Rempel
2025-05-15 8:30 ` [PATCH net-next v4 1/4] net: selftests: drop test index from net_selftest_get_strings() Oleksij Rempel
2025-05-15 8:30 ` [PATCH net-next v4 2/4] net: selftests: prepare for detailed error handling in net_test_get_skb() Oleksij Rempel
2025-05-15 8:30 ` [PATCH net-next v4 3/4] net: selftests: add checksum mode support and SW checksum handling Oleksij Rempel
2025-05-16 12:57 ` Simon Horman
2025-05-17 1:48 ` Jakub Kicinski
2025-05-15 8:31 ` [PATCH net-next v4 4/4] net: selftests: add PHY loopback tests with HW checksum offload Oleksij Rempel
2025-05-17 1:45 ` [PATCH net-next v4 0/4] net: selftest: improve test string formatting and checksum handling Jakub Kicinski
2025-06-20 10:53 ` Oleksij Rempel
2025-06-21 13:46 ` Jakub Kicinski
2025-06-23 11:45 ` Oleksij Rempel
2025-06-23 17:19 ` Jakub Kicinski
2025-06-24 8:26 ` Oleksij Rempel
2025-06-24 16:09 ` Jakub Kicinski
2025-06-25 5:07 ` Oleksij Rempel
2025-06-25 20:21 ` Jakub Kicinski
2025-07-11 8:42 ` Marc Kleine-Budde
2025-07-11 22:36 ` Jakub Kicinski [this message]
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