net: fix possible store tearing in neigh_periodic_work()
While looking at a related syzbot report involving neigh_periodic_work(), I found that I forgot to add an annotation when deleting an RCU protected item from a list. Readers use rcu_deference(*np), we need to use either rcu_assign_pointer() or WRITE_ONCE() on writer side to prevent store tearing. I use rcu_assign_pointer() to have lockdep support, this was the choice made in neigh_flush_dev(). Fixes: 767e97e1 ("neigh: RCU conversion of struct neighbour") Signed-off-by:Eric Dumazet <edumazet@google.com> Reviewed-by:
David Ahern <dsahern@kernel.org> Reviewed-by:
Simon Horman <horms@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
c15cd642