Commit 69ce6487 authored Dec 07, 2015 by Eric Dumazet Committed by David S. Miller Dec 07, 2015

ipv6: sctp: fix lockdep splat in sctp_v6_get_dst()



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: c836a8ba ("ipv6: sctp: add rcu protection around np->opt")
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent ce212d0f

net/sctp/ipv6.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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)) {