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android_kernel_oneplus_msm8998/net/batman-adv
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Sven Eckelmann 639ddeaee4 batman-adv: Reduce refcnt of removed router when updating route 
commit d1a65f1741bfd9c69f9e4e2ad447a89b6810427d upstream.

_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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-11 11:21:18 +02:00
..
bat_algo.h batman-adv: update copyright years for 2015 2015-05-29 10:13:35 +02:00
bat_iv_ogm.c batman-adv: rearrange batadv_neigh_node_new() arguments to follow convention 2015-08-27 20:15:32 +02:00
bitarray.c batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
bitarray.h batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
bridge_loop_avoidance.c batman-adv: Avoid recursive call_rcu for batadv_bla_claim 2016-01-31 11:29:01 -08:00
bridge_loop_avoidance.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
debugfs.c batman-adv: Add required includes to all files 2015-06-07 17:07:19 +02:00
debugfs.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
distributed-arp-table.c batman-adv: fix DAT candidate selection (must use vid) 2016-05-11 11:21:17 +02:00
distributed-arp-table.h batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
fragmentation.c batman-adv: Add lockdep_asserts for documented external locks 2015-08-25 00:12:23 +02:00
fragmentation.h batman-adv: Add required includes to all files 2015-06-07 17:07:19 +02:00
gateway_client.c batman-adv: fix gateway client style issues 2015-08-27 20:15:32 +02:00
gateway_client.h batman-adv: remove obsolete deleted attribute for gateway node 2015-08-27 20:15:32 +02:00
gateway_common.c batman-adv: Fix gw_bandwidth calculation on 32 bit systems 2015-08-25 00:12:22 +02:00
gateway_common.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
hard-interface.c batman-adv: Add lower layer needed_(head|tail)room to own ones 2015-08-27 20:15:34 +02:00
hard-interface.h batman-adv: Drop immediate batadv_hard_iface free function 2016-01-31 11:29:02 -08:00
hash.c batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
hash.h batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
icmp_socket.c batman-adv: Fix kerneldoc over 80 column lines 2015-08-25 00:12:18 +02:00
icmp_socket.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
Kconfig batman-adv: Kconfig, Add missing DEBUG_FS dependency 2015-01-07 22:17:11 +01:00
main.c batman-adv: remove obsolete deleted attribute for gateway node 2015-08-27 20:15:32 +02:00
main.h batman-adv: Start new development cycle 2015-08-27 20:15:33 +02:00
Makefile batman-adv: Makefile, Sort alphabetically 2015-05-29 10:13:36 +02:00
multicast.c batman-adv: Add lockdep_asserts for documented external locks 2015-08-25 00:12:23 +02:00
multicast.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
network-coding.c batman-adv: Avoid recursive call_rcu for batadv_nc_node 2016-01-31 11:29:02 -08:00
network-coding.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
originator.c batman-adv: Drop immediate orig_node free function 2016-01-31 11:29:02 -08:00
originator.h batman-adv: Drop immediate orig_node free function 2016-01-31 11:29:02 -08:00
packet.h batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
routing.c batman-adv: Reduce refcnt of removed router when updating route 2016-05-11 11:21:18 +02:00
routing.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
send.c batman-adv: Fix broadcast/ogm queue limit on a removed interface 2016-05-11 11:21:17 +02:00
send.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
soft-interface.c batman-adv: Check skb size before using encapsulated ETH+VLAN header 2016-05-11 11:21:17 +02:00
soft-interface.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
sysfs.c batman-adv: Replace C99 int types with kernel type 2015-08-25 00:12:17 +02:00
sysfs.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
translation-table.c batman-adv: Drop immediate orig_node free function 2016-01-31 11:29:02 -08:00
translation-table.h batman-adv: Remove batadv_ types forward declarations 2015-08-25 00:12:20 +02:00
types.h batman-adv: remove obsolete deleted attribute for gateway node 2015-08-27 20:15:32 +02:00