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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-30ee3170ee7sm12527351eec.14.2026.06.30.18.55.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jun 2026 18:55:06 -0700 (PDT) Date: Tue, 30 Jun 2026 18:55:03 -0700 From: Stephen Hemminger To: Yafang Shao Cc: kuniyu@google.com, netdev@vger.kernel.org Subject: Re: [PATCH iproute2-next] ss: stop displaying dccp sockets Message-ID: <20260630185503.41541ebf@phoenix.local> In-Reply-To: <20260630114121.26430-1-laoar.shao@gmail.com> References: <20260630114121.26430-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Tue, 30 Jun 2026 19:41:21 +0800 Yafang Shao wrote: > DCCP support was retired in kernel commit 2a63dd0edf38 ("net: Retire > DCCP socket."). However, ss still attempts to query DCCP sockets via > netlink, which triggers repeated SELinux warnings in dmesg: > > SELinux: unrecognized netlink message: protocol=4 nlmsg_type=19 \ > sclass=netlink_tcpdiag_socket pid=188945 comm=ss > > Stop sending DCCPDIAG_GETSOCK netlink messages to suppress these > warnings and align ss with the kernel change. > > Signed-off-by: Yafang Shao > Cc: Kuniyuki Iwashima > --- Please just completely purge dccp. Remove all vestiages from usage and man page. Leave no ghosts behind. We purged decnet in the past.