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mptcp: fix NL PM announced address accounting

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BugLink: https://bugs.launchpad.net/bugs/2083488

commit 4b317e0eb287bd30a1b329513531157c25e8b692 upstream.

Currently the per connection announced address counter is never
decreased. As a consequence, after connection establishment, if
the NL PM deletes an endpoint and adds a new/different one, no
additional subflow is created for the new endpoint even if the
current limits allow that.

Address the issue properly updating the signaled address counter
every time the NL PM removes such addresses.

Fixes: 01cacb00b3 ("mptcp: add netlink-based PM")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Paolo Abeni
2024-07-27 11:04:00 +02:00
committed by Mehmet Basaran
parent 5a277c789c
commit 60942a55f4
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/mptcp/pm_netlink.c
+6 -4
View File
@@ -1409,6 +1409,7 @@ static bool mptcp_pm_remove_anno_addr(struct mptcp_sock *msk,
ret = remove_anno_list_by_saddr(msk, addr);
if (ret || force) {
spin_lock_bh(&msk->pm.lock);
msk->pm.add_addr_signaled -= ret;
mptcp_pm_remove_addr(msk, &list);
spin_unlock_bh(&msk->pm.lock);
}
@@ -1573,17 +1574,18 @@ void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk,
struct mptcp_pm_addr_entry *entry;
list_for_each_entry(entry, rm_list, list) {
if (lookup_subflow_by_saddr(&msk->conn_list, &entry->addr) &&
slist.nr < MPTCP_RM_IDS_MAX)
if (slist.nr < MPTCP_RM_IDS_MAX &&
lookup_subflow_by_saddr(&msk->conn_list, &entry->addr))
slist.ids[slist.nr++] = entry->addr.id;
if (remove_anno_list_by_saddr(msk, &entry->addr) &&
alist.nr < MPTCP_RM_IDS_MAX)
if (alist.nr < MPTCP_RM_IDS_MAX &&
remove_anno_list_by_saddr(msk, &entry->addr))
alist.ids[alist.nr++] = entry->addr.id;
}
if (alist.nr) {
spin_lock_bh(&msk->pm.lock);
msk->pm.add_addr_signaled -= alist.nr;
mptcp_pm_remove_addr(msk, &alist);
spin_unlock_bh(&msk->pm.lock);
}