1 files changed, 4 insertions, 2 deletions

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 6df36ad55a38..b774a03bd1dc 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -252,7 +252,8 @@ static void tcp_delack_timer(unsigned long data)
                 inet_csk(sk)->icsk_ack.blocked = 1;
                 NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED);
                 /* deleguate our work to tcp_release_cb() */
-                set_bit(TCP_WRITE_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags);
+                if (!test_and_set_bit(TCP_DELACK_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags))
+                        sock_hold(sk);
         }
         bh_unlock_sock(sk);
         sock_put(sk);
@@ -481,7 +482,8 @@ static void tcp_write_timer(unsigned long data)
                 tcp_write_timer_handler(sk);
         } else {
                 /* deleguate our work to tcp_release_cb() */
-                set_bit(TCP_WRITE_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags);
+                if (!test_and_set_bit(TCP_WRITE_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags))
+                        sock_hold(sk);
         }
         bh_unlock_sock(sk);
         sock_put(sk);