net: l2: ieee802154: fix deadlock

When an incoming PAN ID does not match or when an error occurs while
sending association requests, then locks were not properly released.

Fixes #78717
Fixes #78495

Signed-off-by: Florian Grandel <fgrandel@code-for-humans.de>
(cherry picked from commit 041d8c7)

subsys/net/l2/ieee802154/ieee802154.c

@@ -317,7 +317,7 @@ static bool ieeee802154_check_dst_addr(struct net_if *iface, struct ieee802154_m
 	if (!(dst_plain->pan_id == IEEE802154_BROADCAST_PAN_ID ||
 	      dst_plain->pan_id == sys_cpu_to_le16(ctx->pan_id))) {
 		LOG_DBG("Frame PAN ID does not match!");
-		return false;
+		goto out;
 	}
 
 	if (mhr->fs->fc.dst_addr_mode == IEEE802154_ADDR_MODE_SHORT) {

subsys/net/l2/ieee802154/ieee802154_mgmt.c

@@ -555,6 +555,7 @@ static int ieee802154_associate(uint32_t mgmt_request, struct net_if *iface,
 	if (ieee802154_radio_send(iface, pkt, pkt->buffer)) {
 		net_pkt_unref(pkt);
 		ret = -EIO;
+		k_sem_give(&ctx->scan_ctx_lock);
 		goto out;
 	}