[PATCH] net: kcm: kcmproc.c: Fix RCU list suspicious usage warning

From: madhuparnabhowmik10
Date: Mon Mar 16 2020 - 13:14:07 EST


From: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>

This path fixes the suspicious RCU usage warning reported by
kernel test robot.

net/kcm/kcmproc.c:#RCU-list_traversed_in_non-reader_section

There is no need to use list_for_each_entry_rcu() in
kcm_stats_seq_show() as the list is always traversed under
knet->mutex held.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>
---
net/kcm/kcmproc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/kcm/kcmproc.c b/net/kcm/kcmproc.c
index 370da2f80e3c..25c1007f1098 100644
--- a/net/kcm/kcmproc.c
+++ b/net/kcm/kcmproc.c
@@ -261,7 +261,7 @@ static int kcm_stats_seq_show(struct seq_file *seq, void *v)
aggregate_strp_stats(&knet->aggregate_strp_stats,
&strp_stats);

- list_for_each_entry_rcu(mux, &knet->mux_list, kcm_mux_list) {
+ list_for_each_entry(mux, &knet->mux_list, kcm_mux_list) {
spin_lock_bh(&mux->lock);
aggregate_mux_stats(&mux->stats, &mux_stats);
aggregate_psock_stats(&mux->aggregate_psock_stats,
--
2.17.1