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-rw-r--r--net/ipv4/tcp_input.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 7c1a92ffa083..4268cd13ff9a 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1160,7 +1160,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
int first_sack_index;
if (!tp->sacked_out) {
- tp->fackets_out = 0;
+ if (WARN_ON(tp->fackets_out))
+ tp->fackets_out = 0;
tp->highest_sack = tp->snd_una;
}
prior_fackets = tp->fackets_out;