• Sven Eckelmann's avatar
    batman-adv: Drop immediate orig_node free function · 42eff6a6
    Sven Eckelmann authored
    It is not allowed to free the memory of an object which is part of a list
    which is protected by rcu-read-side-critical sections without making sure
    that no other context is accessing the object anymore. This usually happens
    by removing the references to this object and then waiting until the rcu
    grace period is over and no one (allowedly) accesses it anymore.
    
    But the _now functions ignore this completely. They free the object
    directly even when a different context still tries to access it. This has
    to be avoided and thus these functions must be removed and all functions
    have to use batadv_orig_node_free_ref.
    
    Fixes: 72822225 ("batman-adv: Fix rcu_barrier() miss due to double call_rcu() in TT code")
    Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
    Signed-off-by: default avatarMarek Lindner <mareklindner@neomailbox.ch>
    Signed-off-by: default avatarAntonio Quartulli <a@unstable.cc>
    42eff6a6
originator.h 4.31 KB