Eric Dumazet 0f04b9af7c netlink: use kfree_rcu() in netlink_release() ... [ Upstream commit 6d772ac557 ] 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-11-17 13:16:14 -08:00
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af_netlink.c	netlink: use kfree_rcu() in netlink_release()	2012-11-17 13:16:14 -08:00
genetlink.c	netlink: add netlink_dump_control structure for netlink_dump_start()	2012-02-26 14:10:06 -05:00
Makefile