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| author | Antoine Tenart <atenart@kernel.org> | 2023-04-27 11:21:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-17 13:58:45 +0200 |
| commit | a7718034f5c0c6e2e41b00915e93f18e98531cf5 (patch) | |
| tree | a52743967817d6089ff382c6ab7b385e7a2be373 /tools/perf/scripts/python/stackcollapse.py | |
| parent | ad2521bf76ff90dd3ff3492bc9f9f8ea7b95f4d8 (diff) | |
net: ipv6: fix skb hash for some RST packets
[ Upstream commit dc6456e938e938d64ffb6383a286b2ac9790a37f ]
The skb hash comes from sk->sk_txhash when using TCP, except for some
IPv6 RST packets. This is because in tcp_v6_send_reset when not in
TIME_WAIT the hash is taken from sk->sk_hash, while it should come from
sk->sk_txhash as those two hashes are not computed the same way.
Packetdrill script to test the above,
0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
+0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
+0 > (flowlabel 0x1) S 0:0(0) <...>
// Wrong ack seq, trigger a rst.
+0 < S. 0:0(0) ack 0 win 4000
// Check the flowlabel matches prior one from SYN.
+0 > (flowlabel 0x1) R 0:0(0) <...>
Fixes: 9258b8b1be2e ("ipv6: tcp: send consistent autoflowlabel in RST packets")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions