From 7d07b3ae8ddad407913c5301877e694430a3263f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 23 Nov 2023 08:24:31 +0000
Subject: [PATCH] add build kerneldeb
---
kernel/net/ipv4/icmp.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/kernel/net/ipv4/icmp.c b/kernel/net/ipv4/icmp.c
index fe10a56..d35719e 100644
--- a/kernel/net/ipv4/icmp.c
+++ b/kernel/net/ipv4/icmp.c
@@ -77,6 +77,7 @@
#include <linux/string.h>
#include <linux/netfilter_ipv4.h>
#include <linux/slab.h>
+#include <linux/locallock.h>
#include <net/snmp.h>
#include <net/ip.h>
#include <net/route.h>
@@ -204,6 +205,8 @@
*
* On SMP we have one ICMP socket per-cpu.
*/
+static DEFINE_LOCAL_IRQ_LOCK(icmp_sk_lock);
+
static struct sock *icmp_sk(struct net *net)
{
return *this_cpu_ptr(net->ipv4.icmp_sk);
@@ -214,12 +217,16 @@
{
struct sock *sk;
+ if (!local_trylock(icmp_sk_lock))
+ return NULL;
+
sk = icmp_sk(net);
if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
/* This can happen if the output path signals a
* dst_link_failure() for an outgoing ICMP packet.
*/
+ local_unlock(icmp_sk_lock);
return NULL;
}
return sk;
@@ -228,6 +235,7 @@
static inline void icmp_xmit_unlock(struct sock *sk)
{
spin_unlock(&sk->sk_lock.slock);
+ local_unlock(icmp_sk_lock);
}
int sysctl_icmp_msgs_per_sec __read_mostly = 1000;
--
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