add build kerneldeb

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2023-11-23 7d07b3ae8ddad407913c5301877e694430a3263f

 kernel/net/ipv4/icmp.c
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@@ -77,6 +77,7 @@
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 #include <linux/string.h>
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 #include <linux/netfilter_ipv4.h>
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 #include <linux/slab.h>
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+#include <linux/locallock.h>
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 #include <net/snmp.h>
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 #include <net/ip.h>
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 #include <net/route.h>
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@@ -204,6 +205,8 @@
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  *
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  *	On SMP we have one ICMP socket per-cpu.
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  */
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+static DEFINE_LOCAL_IRQ_LOCK(icmp_sk_lock);
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+
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 static struct sock *icmp_sk(struct net *net)
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 {
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 	return *this_cpu_ptr(net->ipv4.icmp_sk);
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@@ -214,12 +217,16 @@
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 {
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 	struct sock *sk;
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+	if (!local_trylock(icmp_sk_lock))
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+		return NULL;
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+
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 	sk = icmp_sk(net);
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 	if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
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 		/* This can happen if the output path signals a
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 		 * dst_link_failure() for an outgoing ICMP packet.
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 		 */
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+		local_unlock(icmp_sk_lock);
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 		return NULL;
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 	}
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 	return sk;
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@@ -228,6 +235,7 @@
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 static inline void icmp_xmit_unlock(struct sock *sk)
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 {
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 	spin_unlock(&sk->sk_lock.slock);
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+	local_unlock(icmp_sk_lock);
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 }
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 int sysctl_icmp_msgs_per_sec __read_mostly = 1000;