Files
linux-stable-mirror/include/linux
Eric DumazetandGreg Kroah-Hartman ef8ad3071d udp: fix busy polling
[ Upstream commit a54d51fb2d ]

Generic sk_busy_loop_end() only looks at sk->sk_receive_queue
for presence of packets.

Problem is that for UDP sockets after blamed commit, some packets
could be present in another queue: udp_sk(sk)->reader_queue

In some cases, a busy poller could spin until timeout expiration,
even if some packets are available in udp_sk(sk)->reader_queue.

v3: - make sk_busy_loop_end() nicer (Willem)

v2: - add a READ_ONCE(sk->sk_family) in sk_is_inet() to avoid KCSAN splats.
    - add a sk_is_inet() check in sk_is_udp() (Willem feedback)
    - add a sk_is_inet() check in sk_is_tcp().

Fixes: 2276f58ac5 ("udp: use a separate rx queue for packet reception")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-31 16:19:01 -08:00
..
2024-01-25 15:35:39 -08:00
2024-01-25 15:35:52 -08:00
2023-11-28 17:19:55 +00:00
2023-09-11 15:24:16 -07:00
2024-01-05 15:19:42 +01:00
2023-09-01 00:29:34 +02:00
2023-09-13 10:48:48 +02:00
2023-11-20 11:58:53 +01:00
2023-11-28 17:19:54 +00:00
2023-09-29 17:20:46 -07:00
2023-11-28 17:19:48 +00:00
2023-10-06 11:01:23 +02:00
2023-10-06 11:01:23 +02:00
2024-01-31 16:19:01 -08:00
2023-11-28 17:19:38 +00:00
2024-01-31 16:18:47 -08:00
2023-11-20 11:58:56 +01:00