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| author | Paolo Abeni <pabeni@redhat.com> | 2021-02-19 18:35:40 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-02-22 18:54:59 -0800 |
| commit | 52557dbc7538ecceb27ef2206719a47a8039a335 (patch) | |
| tree | f408921b80f8f4659198c29569f578d99d153428 /net/tipc/bearer.c | |
| parent | ad98dd37051e14fa8c785609430d907fcfd518ba (diff) | |
| download | linux-52557dbc7538ecceb27ef2206719a47a8039a335.tar.gz linux-52557dbc7538ecceb27ef2206719a47a8039a335.tar.bz2 linux-52557dbc7538ecceb27ef2206719a47a8039a335.zip | |
mptcp: do not wakeup listener for MPJ subflows
MPJ subflows are not exposed as fds to user spaces. As such,
incoming MPJ subflows are removed from the accept queue by
tcp_check_req()/tcp_get_cookie_sock().
Later tcp_child_process() invokes subflow_data_ready() on the
parent socket regardless of the subflow kind, leading to poll
wakeups even if the later accept will block.
Address the issue by double-checking the queue state before
waking the user-space.
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/164
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/tipc/bearer.c')
0 files changed, 0 insertions, 0 deletions