1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index dff7d2aaf861..7e16243cdb58 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -101,7 +101,8 @@ tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
                 tcp_parse_options(skb, &tmp_opt, 0, NULL);
 
                 if (tmp_opt.saw_tstamp) {
-                        tmp_opt.rcv_tsecr       -= tcptw->tw_ts_offset;
+                        if (tmp_opt.rcv_tsecr)
+                                tmp_opt.rcv_tsecr -= tcptw->tw_ts_offset;
                         tmp_opt.ts_recent       = tcptw->tw_ts_recent;
                         tmp_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
                         paws_reject = tcp_paws_reject(&tmp_opt, th->rst);