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mptcp: fix local endpoint accounting

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In mptcp_pm_nl_rm_addr_or_subflow() we always mark as available
the id corresponding to the just removed address.

The used bitmap actually tracks only the local IDs: we must
restrict the operation when a (local) subflow is removed.

Fixes: a88c9e4969 ("mptcp: do not block subflows creation on errors")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2022-07-05 14:32:16 -07:00 committed by David S. Miller
parent ca188a25d4
commit 843b5e75ef
1 changed files with 2 additions and 1 deletions
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3
net/mptcp/pm_netlink.c
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@ -807,7 +807,8 @@ static void mptcp_pm_nl_rm_addr_or_subflow(struct mptcp_sock *msk,
removed = true;
__MPTCP_INC_STATS(sock_net(sk), rm_type);
}
__set_bit(rm_list->ids[i], msk->pm.id_avail_bitmap);
if (rm_type == MPTCP_MIB_RMSUBFLOW)
__set_bit(rm_list->ids[i], msk->pm.id_avail_bitmap);
if (!removed)
continue;