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| author | Kuniyuki Iwashima <[email protected]> | 2024-07-03 03:35:08 +0000 |
|---|---|---|
| committer | Paolo Abeni <[email protected]> | 2024-07-04 09:56:12 +0000 |
| commit | 4b74726c01b7a0b5e1029e1e9247fd81590da726 (patch) | |
| tree | 61acac47111feb419d2b48c0a20e86925cc6f4e8 /net/ipv4/tcp_input.c | |
| parent | Merge branch 'fix-oom-and-order-check-in-msg_zerocopy-selftest' (diff) | |
| download | kernel-4b74726c01b7a0b5e1029e1e9247fd81590da726.tar.gz kernel-4b74726c01b7a0b5e1029e1e9247fd81590da726.zip | |
tcp: Don't flag tcp_sk(sk)->rx_opt.saw_unknown for TCP AO.
When we process segments with TCP AO, we don't check it in
tcp_parse_options(). Thus, opt_rx->saw_unknown is set to 1,
which unconditionally triggers the BPF TCP option parser.
Let's avoid the unnecessary BPF invocation.
Fixes: 0a3a809089eb ("net/tcp: Verify inbound TCP-AO signed segments")
Signed-off-by: Kuniyuki Iwashima <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Acked-by: Dmitry Safonov <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index e67cbeeeb95b..77294fd5fd3e 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4224,6 +4224,13 @@ void tcp_parse_options(const struct net *net, */ break; #endif +#ifdef CONFIG_TCP_AO + case TCPOPT_AO: + /* TCP AO has already been checked + * (see tcp_inbound_ao_hash()). + */ + break; +#endif case TCPOPT_FASTOPEN: tcp_parse_fastopen_option( opsize - TCPOLEN_FASTOPEN_BASE, |