D14910.1793842864.diff
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	Index: head/sys/net/if.c
	===================================================================
	--- head/sys/net/if.c
	+++ head/sys/net/if.c
	@@ -97,6 +97,13 @@

	#include <security/mac/mac_framework.h>

	+/*
	+ * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
	+ * and ifr_ifru when it is used in SIOCGIFCONF.
	+ */
	+_Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
	+ offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
	+
	#ifdef COMPAT_FREEBSD32
	#include <sys/mount.h>
	#include <compat/freebsd32/freebsd32.h>
	Index: head/sys/netinet6/in6.c
	===================================================================
	--- head/sys/netinet6/in6.c
	+++ head/sys/netinet6/in6.c
	@@ -112,6 +112,14 @@
	#include <netinet6/in6_fib.h>
	#include <netinet6/in6_pcb.h>

	+/*
	+ * struct in6_ifreq and struct ifreq must be type punnable for common members
	+ * of ifr_ifru to allow accessors to be shared.
	+ */
	+_Static_assert(offsetof(struct in6_ifreq, ifr_ifru) ==
	+ offsetof(struct ifreq, ifr_ifru),
	+ "struct in6_ifreq and struct ifreq are not type punnable");
	+
	VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
	#define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)