Eric Dumazet 6d772ac557 netlink: use kfree_rcu() in netlink_release() ... On some suspend/resume operations involving wimax device, we have noticed some intermittent memory corruptions in netlink code. Stéphane Marchesin tracked this corruption in netlink_update_listeners() and suggested a patch. It appears netlink_release() should use kfree_rcu() instead of kfree() for the listeners structure as it may be used by other cpus using RCU protection. netlink_release() must set to NULL the listeners pointer when it is about to be freed. Also have to protect netlink_update_listeners() and netlink_has_listeners() if listeners is NULL. Add a nl_deref_protected() lockdep helper to properly document which locks protects us. Reported-by: Jonathan Kliegman <kliegs@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Stéphane Marchesin <marcheu@google.com> Cc: Sam Leffler <sleffler@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2012-10-18 15:34:30 -04:00
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af_netlink.c	netlink: use kfree_rcu() in netlink_release()	2012-10-18 15:34:30 -04:00
genetlink.c	netlink: Rename pid to portid to avoid confusion	2012-09-10 15:30:41 -04:00
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