From: Eric Dumazet <edumazet@xxxxxxxxxx> commit 69ce6487dcd364245a3d26322fc8f4ffd1e8d947 upstream. While cooking the sctp np->opt rcu fixes, I forgot to move one rcu_read_unlock() after the added rcu_dereference() in sctp_v6_get_dst() This gave lockdep warnings reported by Dave Jones. Fixes: c836a8ba9386 ("ipv6: sctp: add rcu protection around np->opt") Reported-by: Dave Jones <davej@xxxxxxxxxxxxxxxxx> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx> --- net/sctp/ipv6.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 15bc2886a529..5fb8b7b579f9 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -323,14 +323,13 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, } } } - rcu_read_unlock(); - if (baddr) { fl6->saddr = baddr->v6.sin6_addr; fl6->fl6_sport = baddr->v6.sin6_port; final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); dst = ip6_dst_lookup_flow(sk, fl6, final_p); } + rcu_read_unlock(); out: if (!IS_ERR_OR_NULL(dst)) { -- 2.7.4