net/tcp: Don't consider TCP_CLOSE in TCP_AO_ESTABLISHED

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TCP_CLOSE may or may not have current/rnext keys and should not be
considered "established". The fast-path for TCP_CLOSE is
SKB_DROP_REASON_TCP_CLOSE. This is what tcp_rcv_state_process() does
anyways. Add an early drop path to not spend any time verifying
segment signatures for sockets in TCP_CLOSE state.

Cc: stable@vger.kernel.org # v6.7
Fixes: 0a3a809089 ("net/tcp: Verify inbound TCP-AO signed segments")
Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com>
Link: https://lore.kernel.org/r/20240529-tcp_ao-sk_state-v1-1-d69b5d323c52@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Dmitry Safonov 2024-05-29 18:29:32 +01:00 • committed by Jakub Kicinski

parent e85e271dec

commit 33700a0c9b

2 changed files with 13 additions and 7 deletions

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7

include/net/tcp_ao.h

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13

net/ipv4/tcp_ao.c

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