Sven Eckelmann ff90a4c6ed batman-adv: Hold rtnl lock during MTU update via netlink ... commit 987aae75fc upstream. The automatic recalculation of the maximum allowed MTU is usually triggered by code sections which are already rtnl lock protected by callers outside of batman-adv. But when the fragmentation setting is changed via batman-adv's own batadv genl family, then the rtnl lock is not yet taken. But dev_set_mtu requires that the caller holds the rtnl lock because it uses netdevice notifiers. And this code will then fail the check for this lock: RTNL: assertion failed at net/core/dev.c (1953) Cc: stable@vger.kernel.org Reported-by: syzbot+f8812454d9b3ac00d282@syzkaller.appspotmail.com Fixes: c6a953cce8 ("batman-adv: Trigger events for auto adjusted MTU") Signed-off-by: Sven Eckelmann <sven@narfation.org> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20230821-batadv-missing-mtu-rtnl-lock-v1-1-1c5a7bfe861e@narfation.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-30 16:18:18 +02:00
..
bat_algo.c
bat_algo.h
bat_iv_ogm.c
bat_iv_ogm.h
bat_v.c
bat_v.h
bat_v_elp.c	batman-adv: Do not get eth header before batadv_check_management_packet	2023-08-30 16:18:17 +02:00
bat_v_elp.h
bat_v_ogm.c	batman-adv: Fix batadv_v_ogm_aggr_send memory leak	2023-08-30 16:18:17 +02:00
bat_v_ogm.h
bitarray.c
bitarray.h
bridge_loop_avoidance.c	batman-adv: Use netif_rx_any_context() any.	2022-07-29 17:25:07 +02:00
bridge_loop_avoidance.h
distributed-arp-table.c	batman-adv: Broken sync while rescheduling delayed work	2023-06-14 11:13:04 +02:00
distributed-arp-table.h
fragmentation.c	batman-adv: Don't skb_split skbuffs with frag_list	2022-05-18 10:26:47 +02:00
fragmentation.h
gateway_client.c
gateway_client.h
gateway_common.c
gateway_common.h
hard-interface.c	batman-adv: Don't increase MTU when set by user	2023-08-30 16:18:17 +02:00
hard-interface.h
hash.c
hash.h
Kconfig
log.c
log.h
main.c	net: batman-adv: fix error handling	2021-10-26 14:47:12 +01:00
main.h
Makefile
multicast.c	ipv6: make mc_forwarding atomic	2022-04-13 20:59:03 +02:00
multicast.h	batman-adv: mcast: don't send link-local multicast to mcast routers	2022-01-11 15:35:14 +01:00
netlink.c	batman-adv: Hold rtnl lock during MTU update via netlink	2023-08-30 16:18:18 +02:00
netlink.h
network-coding.c	net: batman-adv: fix error handling	2021-10-26 14:47:12 +01:00
network-coding.h
originator.c
originator.h
routing.c
routing.h
send.c
send.h
soft-interface.c	batman-adv: Don't increase MTU when set by user	2023-08-30 16:18:17 +02:00
soft-interface.h
tp_meter.c
tp_meter.h
trace.c
trace.h
translation-table.c	batman-adv: Fix TT global entry leak when client roamed back	2023-08-30 16:18:17 +02:00
translation-table.h
tvlv.c
tvlv.h
types.h	batman-adv: Don't increase MTU when set by user	2023-08-30 16:18:17 +02:00