batman-adv: fix global protection fault during soft_iface destruction
authorAntonio Quartulli <ordex@autistici.org>
Fri, 19 Apr 2013 09:04:52 +0000 (11:04 +0200)
committerDavid S. Miller <davem@davemloft.net>
Tue, 23 Apr 2013 00:40:48 +0000 (20:40 -0400)
commit0c501345ce24983d234fc913e7e81b6abe59cb54
treec08635c7a029036a7bf71f79a11c1a21e5b6204c
parent6e0895c2ea326cc4bb11e8fa2f654628d5754c31
batman-adv: fix global protection fault during soft_iface destruction

batadv_mesh_free() schedules some RCU callbacks which need the bat_priv struct
to do their jobs, while free_netdev(), which is called immediately after, is
destroying the private data.

Put an rcu_barrier() in the middle so that free_netdev() is invoked only after
all the callbacks returned.

This bug has been introduced by ab8f433dd39be94e8617cff2dfe9f7eca162eb15
("batman-adv: Move deinitialization of soft-interface to destructor")

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/batman-adv/soft-interface.c