diff options
| author | Matthieu Baerts (NGI0) <matttbe@kernel.org> | 2025-09-18 10:50:18 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-19 07:06:19 -0700 |
| commit | 833d4313bc1e9e194814917d23e8874d6b651649 (patch) | |
| tree | 3a86cf79a7610f2286096cec19c61be4a5b8e378 | |
| parent | c4bdef8b3d2a9ad4ac45017fa294b3b0784ca974 (diff) | |
mptcp: reset blackhole on success with non-loopback ifaces
When a first MPTCP connection gets successfully established after a
blackhole period, 'active_disable_times' was supposed to be reset when
this connection was done via any non-loopback interfaces.
Unfortunately, the opposite condition was checked: only reset when the
connection was established via a loopback interface. Fixing this by
simply looking at the opposite.
This is similar to what is done with TCP FastOpen, see
tcp_fastopen_active_disable_ofo_check().
This patch is a follow-up of a previous discussion linked to commit
893c49a78d9f ("mptcp: Use __sk_dst_get() and dst_dev_rcu() in
mptcp_active_enable()."), see [1].
Fixes: 27069e7cb3d1 ("mptcp: disable active MPTCP in case of blackhole")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/4209a283-8822-47bd-95b7-87e96d9b7ea3@kernel.org [1]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250918-net-next-mptcp-blackhole-reset-loopback-v1-1-bf5818326639@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/mptcp/ctrl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c index e8ffa62ec183..d96130e49942 100644 --- a/net/mptcp/ctrl.c +++ b/net/mptcp/ctrl.c @@ -507,7 +507,7 @@ void mptcp_active_enable(struct sock *sk) rcu_read_lock(); dst = __sk_dst_get(sk); dev = dst ? dst_dev_rcu(dst) : NULL; - if (dev && (dev->flags & IFF_LOOPBACK)) + if (!(dev && (dev->flags & IFF_LOOPBACK))) atomic_set(&pernet->active_disable_times, 0); rcu_read_unlock(); } |