diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-07-07 21:38:59 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-09 19:24:10 -0700 |
| commit | 1a03edeb84e6e3b9c6ca5a642557bced93d54434 (patch) | |
| tree | 70214311353feee546f842e1629027ae359b5648 /net/ipv4/tcp_input.c | |
| parent | ffdde7bf5a439aaa1955ebd581f5c64ab1533963 (diff) | |
tcp: refine sk_rcvbuf increase for ooo packets
When a passive flow has not been accepted yet, it is
not wise to increase sk_rcvbuf when receiving ooo packets.
A very busy server might tune down tcp_rmem[1] to better
control how much memory can be used by sockets waiting
in its listeners accept queues.
Fixes: 63ad7dfedfae ("tcp: adjust rcvbuf in presence of reorders")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250707213900.1543248-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 12c2e6fc85c6..68bc79eb9019 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5181,7 +5181,9 @@ end: skb_condense(skb); skb_set_owner_r(skb, sk); } - tcp_rcvbuf_grow(sk); + /* do not grow rcvbuf for not-yet-accepted or orphaned sockets. */ + if (sk->sk_socket) + tcp_rcvbuf_grow(sk); } static int __must_check tcp_queue_rcv(struct sock *sk, struct sk_buff *skb, |