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| author | Paolo Abeni <pabeni@redhat.com> | 2024-02-08 19:03:54 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-02-12 10:08:13 +0000 |
| commit | 337cebbd850f94147cee05252778f8f78b8c337f (patch) | |
| tree | b8285f6b5af2c0764e628f51630842e52aaf477e /fs/omfs | |
| parent | f012d796a6de662692159c539689e47e662853a8 (diff) | |
| download | linux-337cebbd850f94147cee05252778f8f78b8c337f.tar.gz linux-337cebbd850f94147cee05252778f8f78b8c337f.tar.bz2 linux-337cebbd850f94147cee05252778f8f78b8c337f.zip | |
mptcp: really cope with fastopen race
Fastopen and PM-trigger subflow shutdown can race, as reported by
syzkaller.
In my first attempt to close such race, I missed the fact that
the subflow status can change again before the subflow_state_change
callback is invoked.
Address the issue additionally copying with all the states directly
reachable from TCP_FIN_WAIT1.
Fixes: 1e777f39b4d7 ("mptcp: add MSG_FASTOPEN sendmsg flag support")
Fixes: 4fd19a307016 ("mptcp: fix inconsistent state on fastopen race")
Cc: stable@vger.kernel.org
Reported-by: syzbot+c53d4d3ddb327e80bc51@syzkaller.appspotmail.com
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/458
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/omfs')
0 files changed, 0 insertions, 0 deletions