batman-adv: protect tt_local_entry from concurrent delete events

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commit ef72706a05 upstream.

The tt_local_entry deletion performed in batadv_tt_local_remove() was neither
protecting against simultaneous deletes nor checking whether the element was
still part of the list before calling hlist_del_rcu().

Replacing the hlist_del_rcu() call with batadv_hash_remove() provides adequate
protection via hash spinlocks as well as an is-element-still-in-hash check to
avoid 'blind' hash removal.

Fixes: 068ee6e204 ("batman-adv: roaming handling mechanism redesign")
Reported-by: alfonsname@web.de
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Marek Lindner 2015-06-17 20:01:36 +08:00 • committed by Greg Kroah-Hartman

parent b046d646f1

commit 103c584bcd

1 changed files with 10 additions and 1 deletions

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net/batman-adv/translation-table.c

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