tcp: relookup sock for RST+ACK packets handled by obsolete req sock
[ Upstream commit 7233da86 ] Currently tcp_check_req can be called with obsolete req socket for which big socket have been already created (because of CPU race or early demux assigning req socket to multiple packets in gro batch). Commit e0f9759f ("tcp: try to keep packet if SYN_RCV race is lost") added retry in case when tcp_check_req is called for PSH|ACK packet. But if client sends RST+ACK immediatly after connection being established (it is performing healthcheck, for example) retry does not occur. In that case tcp_check_req tries to close req socket, leaving big socket active. Fixes: e0f9759f ("tcp: try to keep packet if SYN_RCV race is lost") Signed-off-by:Alexander Ovechkin <ovov@yandex-team.ru> Reported-by:
Oleg Senin <olegsenin@yandex-team.ru> Reviewed-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Sasha Levin <sashal@kernel.org>
parent
50f41f2e
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