tree 9840478f060772c97d0379312224889e5953e94e
parent 7ec8dc96e1cb45693f28f1287802ef6f2888dae0
author Tung Nguyen <tung.q.nguyen@dektech.com.au> 1539377215 +0200
committer David S. Miller <davem@davemloft.net> 1539668007 -0700

tipc: fix unsafe rcu locking when accessing publication list

The binding table's 'cluster_scope' list is rcu protected to handle
races between threads changing the list and those traversing the list at
the same moment. We have now found that the function named_distribute()
uses the regular list_for_each() macro to traverse the said list.
Likewise, the function tipc_named_withdraw() is removing items from the
same list using the regular list_del() call. When these two functions
execute in parallel we see occasional crashes.

This commit fixes this by adding the missing _rcu() suffixes.

Signed-off-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>