net: ieee802154: Do not access addr of unaligned struct

Use UNALIGNED_MEMBER_ADDR when getting the address of possibly
unaligned structures members instead of attempting to directly
get the address as an offset.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

Author: aescolar

subsys/net/l2/ieee802154/ieee802154.c

@@ -16,6 +16,7 @@ LOG_MODULE_REGISTER(net_ieee802154, CONFIG_NET_L2_IEEE802154_LOG_LEVEL);
 
 #include <errno.h>
 
+#include <zephyr/toolchain/gcc.h>
 #include <zephyr/net/capture.h>
 #include <zephyr/net/ethernet.h>
 #include <zephyr/net/net_core.h>
@@ -264,7 +265,8 @@ static inline void swap_and_set_pkt_ll_addr(struct net_linkaddr *addr, bool has_
 		(void)net_linkaddr_create(
 			addr,
 			(const uint8_t *)(has_pan_id ?
-					  &ll->plain.addr.short_addr : &ll->comp.addr.short_addr),
+					UNALIGNED_MEMBER_ADDR(ll, plain.addr.short_addr) :
+					UNALIGNED_MEMBER_ADDR(ll, comp.addr.short_addr)),
 			IEEE802154_SHORT_ADDR_LENGTH,
 			NET_LINK_IEEE802154);
 		break;