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2024-05-10 cde9070d9970eef1f7ec2360586c802a16230ad8

 kernel/net/batman-adv/netlink.c
.. .. @@ -496,7 +496,10 @@
496 496  		attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
497 497  
498 498  		atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
499 +
500 +		rtnl_lock();
499 501  		batadv_update_min_mtu(bat_priv->soft_iface);
502 +		rtnl_unlock();
500 503  	}
501 504  
502 505  	if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {

..	..	@@ -496,7 +496,10 @@
496	496	attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
497	497
498	498	atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
	499	+
	500	+ rtnl_lock();
499	501	batadv_update_min_mtu(bat_priv->soft_iface);
	502	+ rtnl_unlock();
500	503	}
501	504
502	505	if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {