espintcp: use datagram_poll_queue for socket readiness

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[ Upstream commit 0fc3e32c2c ]

espintcp uses a custom queue (ike_queue) to deliver packets to
userspace. The polling logic relies on datagram_poll, which checks
sk_receive_queue, which can lead to false readiness signals when that
queue contains non-userspace packets.

Switch espintcp_poll to use datagram_poll_queue with ike_queue, ensuring
poll only signals readiness when userspace data is actually available.

Fixes: e27cca96cd ("xfrm: add espintcp (RFC 8229)")
Signed-off-by: Ralf Lici <ralf@mandelbit.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://patch.msgid.link/20251021100942.195010-3-ralf@mandelbit.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ralf Lici 2025-10-21 12:09:41 +02:00 • committed by Greg Kroah-Hartman

parent 89941a0d0f

commit d4fa3e039f

1 changed files with 1 additions and 5 deletions

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net/xfrm/espintcp.c

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