[RH7,2/2] ms/netfilter: ipset: Correct rcu_dereference() call in ip_set_put_comment()

Submitted by Vasily Averin on Dec. 1, 2020, 8:43 a.m.


Message ID 2098d865-5fd7-0b8b-b246-7fb2979957c5@virtuozzo.com
State New
Series "Series without cover letter"
Headers show

Commit Message

Vasily Averin Dec. 1, 2020, 8:43 a.m.
From: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>

The function is called when rcu_read_lock() is held and not
when rcu_read_lock_bh() is held.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

(cherry-picked from commit 17b8b74c0f8dbf9b9e3301f9ca5b65dd1c079951)
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
 include/linux/netfilter/ipset/ip_set_comment.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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diff --git a/include/linux/netfilter/ipset/ip_set_comment.h b/include/linux/netfilter/ipset/ip_set_comment.h
index 8e2bab1..70877f8d 100644
--- a/include/linux/netfilter/ipset/ip_set_comment.h
+++ b/include/linux/netfilter/ipset/ip_set_comment.h
@@ -43,11 +43,11 @@  ip_set_init_comment(struct ip_set *set, struct ip_set_comment *comment,
 	rcu_assign_pointer(comment->c, c);
-/* Used only when dumping a set, protected by rcu_read_lock_bh() */
+/* Used only when dumping a set, protected by rcu_read_lock() */
 static inline int
 ip_set_put_comment(struct sk_buff *skb, const struct ip_set_comment *comment)
-	struct ip_set_comment_rcu *c = rcu_dereference_bh(comment->c);
+	struct ip_set_comment_rcu *c = rcu_dereference(comment->c);
 	if (!c)
 		return 0;