diff options
| author |   Paolo Abeni <pabeni@redhat.com> | 2025-11-18 08:20:19 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2025-11-19 20:07:14 -0800 |
| commit | 5e15395f6d9ec07395866c5511f4b4ac566c0c9b (patch) | |
| tree | dfb0b5299153cc274bc4f8e7d116a2a6f8643de4 /security/integrity/git:/ssh:/git@git.zx2c4.com | |
| parent | net: phylink: add missing supported link modes for the fixed-link (diff) | |
mptcp: fix ack generation for fallback msk
mptcp_cleanup_rbuf() needs to know the last most recent, mptcp-level
rcv_wnd sent, and such information is tracked into the msk->old_wspace
field, updated at ack transmission time by mptcp_write_options().
Fallback socket do not add any mptcp options, such helper is never
invoked, and msk->old_wspace value remain stale. That in turn makes
ack generation at recvmsg() time quite random.
Address the issue ensuring mptcp_write_options() is invoked even for
fallback sockets, and just update the needed info in such a case.
The issue went unnoticed for a long time, as mptcp currently overshots
the fallback socket receive buffer autotune significantly. It is going
to change in the near future.
Fixes: e3859603ba13 ("mptcp: better msk receive window updates")
Cc: stable@vger.kernel.org
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/594
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Geliang Tang <geliang@kernel.org>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20251118-net-mptcp-misc-fixes-6-18-rc6-v1-1-806d3781c95f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'security/integrity/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions