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authorAmol Grover <frextrite@gmail.com>2020-02-22 19:57:27 +0300
committerDavid S. Miller <davem@davemloft.net>2020-02-25 00:19:21 +0300
commit28b380e28925cad4ccc70b1cd2faef7aa7ba707d (patch)
treeef29943aaa7da7bcde9cea44b67a02ff56d0c291 /net/ipv6/ip6mr.c
parent57a10d8c1123068e3cb06434fbc9634f945d3062 (diff)
downloadlinux-28b380e28925cad4ccc70b1cd2faef7aa7ba707d.tar.xz
ip6mr: Fix RCU list debugging warning
ip6mr_for_each_table() macro uses list_for_each_entry_rcu() for traversing outside an RCU read side critical section but under the protection of rtnl_mutex. Hence add the corresponding lockdep expression to silence the following false-positive warnings: [ 4.319479] ============================= [ 4.319480] WARNING: suspicious RCU usage [ 4.319482] 5.5.4-stable #17 Tainted: G E [ 4.319483] ----------------------------- [ 4.319485] net/ipv6/ip6mr.c:1243 RCU-list traversed in non-reader section!! [ 4.456831] ============================= [ 4.456832] WARNING: suspicious RCU usage [ 4.456834] 5.5.4-stable #17 Tainted: G E [ 4.456835] ----------------------------- [ 4.456837] net/ipv6/ip6mr.c:1582 RCU-list traversed in non-reader section!! Signed-off-by: Amol Grover <frextrite@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6mr.c')
-rw-r--r--net/ipv6/ip6mr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index bfa49ff70531..d6483926f449 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -97,7 +97,8 @@ static void ipmr_expire_process(struct timer_list *t);
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
#define ip6mr_for_each_table(mrt, net) \
- list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)
+ list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list, \
+ lockdep_rtnl_is_held())
static struct mr_table *ip6mr_mr_table_iter(struct net *net,
struct mr_table *mrt)