From f55628b3e7648198e9c072b52080c5dea8678adf Mon Sep 17 00:00:00 2001 From: Jianguo Wu Date: Sat, 5 Dec 2020 15:56:33 +0800 Subject: [PATCH] mptcp: print new line in mptcp_seq_show() if mptcp isn't in use When do cat /proc/net/netstat, the output isn't append with a new line, it looks like this: [root@localhost ~]# cat /proc/net/netstat ... MPTcpExt: 0 0 0 0 0 0 0 0 0 0 0 0 0[root@localhost ~]# This is because in mptcp_seq_show(), if mptcp isn't in use, net->mib.mptcp_statistics is NULL, so it just puts all 0 after "MPTcpExt:", and return, forgot the '\n'. After this patch: [root@localhost ~]# cat /proc/net/netstat ... MPTcpExt: 0 0 0 0 0 0 0 0 0 0 0 0 0 [root@localhost ~]# Fixes: fc518953bc9c8d7d ("mptcp: add and use MIB counter infrastructure") Signed-off-by: Jianguo Wu Acked-by: Florian Westphal Link: https://lore.kernel.org/r/142e2fd9-58d9-bb13-fb75-951cccc2331e@163.com Signed-off-by: Jakub Kicinski --- net/mptcp/mib.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c index 84d119436b22..b921cbdd9aaa 100644 --- a/net/mptcp/mib.c +++ b/net/mptcp/mib.c @@ -67,6 +67,7 @@ void mptcp_seq_show(struct seq_file *seq) for (i = 0; mptcp_snmp_list[i].name; i++) seq_puts(seq, " 0"); + seq_putc(seq, '\n'); return; }