1 files changed, 6 insertions, 3 deletions

diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index 243c9f225a73..5c4171c5d2bd 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -64,8 +64,10 @@ static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 {
         struct cls_bpf_head *head = rcu_dereference_bh(tp->root);
         struct cls_bpf_prog *prog;
-        int ret;
+        int ret = -1;
 
+        /* Needed here for accessing maps. */
+        rcu_read_lock();
         list_for_each_entry_rcu(prog, &head->plist, link) {
                 int filter_res = BPF_PROG_RUN(prog->filter, skb);
 
@@ -80,10 +82,11 @@ static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
                 if (ret < 0)
                         continue;
 
-                return ret;
+                break;
         }
+        rcu_read_unlock();
 
-        return -1;
+        return ret;
 }
 
 static bool cls_bpf_is_ebpf(const struct cls_bpf_prog *prog)