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d1a65f1741
linux/net/batman-adv
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Sven Eckelmann d1a65f1741 batman-adv: Reduce refcnt of removed router when updating route 
_batadv_update_route rcu_derefences orig_ifinfo->router outside of a
spinlock protected region to print some information messages to the debug
log. But this pointer is not checked again when the new pointer is assigned
in the spinlock protected region. Thus is can happen that the value of
orig_ifinfo->router changed in the meantime and thus the reference counter
of the wrong router gets reduced after the spinlock protected region.

Just rcu_dereferencing the value of orig_ifinfo->router inside the spinlock
protected region (which also set the new pointer) is enough to get the
correct old router object.

Fixes: e1a5382f97 ("batman-adv: Make orig_node->router an rcu protected pointer")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
2016-04-24 15:41:25 +08:00
..
bat_algo.h batman-adv: OGMv2 - add basic infrastructure 2016-02-29 16:05:31 +08:00
bat_iv_ogm.c batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
bat_v_elp.c batman-adv: ELP - send unicast ELP packets for throughput sampling 2016-02-29 16:25:07 +08:00
bat_v_elp.h batman-adv: ELP - compute the metric based on the estimated throughput 2016-02-29 16:25:06 +08:00
bat_v_ogm.c batman-adv: ELP - compute the metric based on the estimated throughput 2016-02-29 16:25:06 +08:00
bat_v_ogm.h batman-adv: OGMv2 - implement originators logic 2016-02-29 16:05:31 +08:00
bat_v.c batman-adv: B.A.T.M.A.N. V - implement bat_neigh_print API 2016-02-29 16:25:08 +08:00
bitarray.c batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
bitarray.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
bridge_loop_avoidance.c batman-adv: Rename batadv_claim *_free_ref function to *_put 2016-02-23 13:48:27 +08:00
bridge_loop_avoidance.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
debugfs.c batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
debugfs.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
distributed-arp-table.c batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
distributed-arp-table.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
fragmentation.c batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
fragmentation.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
gateway_client.c batman-adv: Rename batadv_gw_node *_free_ref function to *_put 2016-02-23 13:49:06 +08:00
gateway_client.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
gateway_common.c batman-adv: add throughput override attribute to hard_ifaces 2016-02-29 16:05:32 +08:00
gateway_common.h batman-adv: add throughput override attribute to hard_ifaces 2016-02-29 16:05:32 +08:00
hard-interface.c batman-adv: Deactivate TO_BE_ACTIVATED hardif on shutdown 2016-04-24 15:40:23 +08:00
hard-interface.h batman-adv: Rename batadv_hardif *_free_ref function to *_put 2016-02-23 13:48:24 +08:00
hash.c batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
hash.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
icmp_socket.c batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
icmp_socket.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
Kconfig batman-adv: clarify CFG80211 dependency 2016-03-02 13:45:47 -05:00
main.c batman-adv: OGMv2 - add basic infrastructure 2016-02-29 16:05:31 +08:00
main.h batman-adv: Start new development cycle 2016-02-29 16:25:08 +08:00
Makefile batman-adv: OGMv2 - add basic infrastructure 2016-02-29 16:05:31 +08:00
multicast.c batman-adv: Convert batadv_orig_node to kref 2016-02-10 23:24:06 +08:00
multicast.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
network-coding.c batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
network-coding.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
originator.c batman-adv: init neigh node last seen field 2016-04-24 15:39:19 +08:00
originator.h batman-adv: Rename batadv_orig_node_vlan *_free_ref function to *_put 2016-02-23 13:50:58 +08:00
packet.h batman-adv: OGMv2 - add basic infrastructure 2016-02-29 16:05:31 +08:00
routing.c batman-adv: Reduce refcnt of removed router when updating route 2016-04-24 15:41:25 +08:00
routing.h batman-adv: add seqno maximum age and protection start flag parameters 2016-02-10 23:23:57 +08:00
send.c batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
send.h batman-adv: keep track of when unicast packets are sent 2016-02-29 16:05:32 +08:00
soft-interface.c batman-adv: Check skb size before using encapsulated ETH+VLAN header 2016-04-24 15:37:21 +08:00
soft-interface.h batman-adv: Rename batadv_softif_vlan *_free_ref function to *_put 2016-02-23 13:49:10 +08:00
sysfs.c batman-adv: add throughput override attribute to hard_ifaces 2016-02-29 16:05:32 +08:00
sysfs.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
translation-table.c batman-adv: Rename batadv_tt_orig_list_entry *_free_ref function to *_put 2016-02-23 13:51:01 +08:00
translation-table.h batman-adv: update copyright years for 2016 2016-02-02 12:55:10 +08:00
types.h batman-adv: ELP - compute the metric based on the estimated throughput 2016-02-29 16:25:06 +08:00