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-rw-r--r--net/ipv4/ip_fragment.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index cc1da6d9cb35..83424f1742b8 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -173,6 +173,13 @@ static void ipq_kill(struct ipq *ipq)
inet_frag_kill(&ipq->q, &ip4_frags);
}
+static bool frag_expire_skip_icmp(u32 user)
+{
+ return user == IP_DEFRAG_AF_PACKET ||
+ ip_defrag_user_in_between(user, IP_DEFRAG_CONNTRACK_IN,
+ __IP_DEFRAG_CONNTRACK_IN_END);
+}
+
/*
* Oops, a fragment queue timed out. Kill it and send an ICMP reply.
*/
@@ -217,10 +224,8 @@ static void ip_expire(unsigned long arg)
/* Only an end host needs to send an ICMP
* "Fragment Reassembly Timeout" message, per RFC792.
*/
- if (qp->user == IP_DEFRAG_AF_PACKET ||
- ((qp->user >= IP_DEFRAG_CONNTRACK_IN) &&
- (qp->user <= __IP_DEFRAG_CONNTRACK_IN_END) &&
- (skb_rtable(head)->rt_type != RTN_LOCAL)))
+ if (frag_expire_skip_icmp(qp->user) &&
+ (skb_rtable(head)->rt_type != RTN_LOCAL))
goto out_rcu_unlock;
/* Send an ICMP "Fragment Reassembly Timeout" message. */

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