tcp: fix __tcp_close() to only send RST when required

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[ Upstream commit 5f92385309 ]

If the receive queue contains payload that was already
received, __tcp_close() can send an unexpected RST.

Refine the code to take tp->copied_seq into account,
as we already do in tcp recvmsg().

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Link: https://patch.msgid.link/20250903084720.1168904-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Eric Dumazet 2025-09-03 08:47:18 +00:00 • committed by Greg Kroah-Hartman

parent e4ed50b0dc

commit 5eb76d1283

1 changed files with 5 additions and 4 deletions

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net/ipv4/tcp.c

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