1 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 3d7a2c0b836a..87be58673b55 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -328,6 +328,7 @@ int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
         int err;
         int is_udplite = IS_UDPLITE(sk);
         int is_udp4;
+        bool slow;
 
         if (addr_len)
                 *addr_len=sizeof(struct sockaddr_in6);
@@ -424,7 +425,7 @@ out:
         return err;
 
 csum_copy_err:
-        lock_sock_bh(sk);
+        slow = lock_sock_fast(sk);
         if (!skb_kill_datagram(sk, skb, flags)) {
                 if (is_udp4)
                         UDP_INC_STATS_USER(sock_net(sk),
@@ -433,7 +434,7 @@ csum_copy_err:
                         UDP6_INC_STATS_USER(sock_net(sk),
                                         UDP_MIB_INERRORS, is_udplite);
         }
-        unlock_sock_bh(sk);
+        unlock_sock_fast(sk, slow);
 
         if (flags & MSG_DONTWAIT)
                 return -EAGAIN;