commit 5ba7dcfe77037b67016263ea597a8b431692ecab upstream.
The originator node object orig_neigh_node is used to when accessing the bcast_own(_sum) and real_packet_count information. The access to them has to be protected with the spinlock in orig_neigh_node.
But the function uses the lock in orig_node instead. This is incorrect because they could be two different originator node objects.
Fixes: 0ede9f41b217 ("batman-adv: protect bit operations to count OGMs with spinlock") Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Simon Wunderlich sw@simonwunderlich.de Signed-off-by: Sven Eckelmann sven@narfation.org --- net/batman-adv/bat_iv_ogm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 749b9157fe11..910889dd5356 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -1180,7 +1180,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, orig_node->last_seen = jiffies;
/* find packet count of corresponding one hop neighbor */ - spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); + spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); if_num = if_incoming->if_num; orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); @@ -1190,7 +1190,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, } else { neigh_rq_count = 0; } - spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); + spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock);
/* pay attention to not get a value bigger than 100 % */ if (orig_eq_count > neigh_rq_count)