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(parent: bb9b18f) | patch
netlink: Avoid netlink mmap alloc if msg size exceeds frame size
authorThomas Graf <tgraf@suug.ch>
Sat, 30 Nov 2013 12:21:31 +0000 (13:21 +0100)
committerJesse Gross <jesse@nicira.com>
Mon, 6 Jan 2014 23:52:06 +0000 (15:52 -0800)
commitaae9f0e22c07f6b97752741156ac0b3637d37a1a
tree164aafabd87e384e55527a37ab67761ef7473c86tree | snapshot (tar.gz zip)
parentbb9b18fb55b03477fe5bdd3e97245d6d4d3dee4fcommit | diff
netlink: Avoid netlink mmap alloc if msg size exceeds frame size

An insufficent ring frame size configuration can lead to an
unnecessary skb allocation for every Netlink message. Check frame
size before taking the queue lock and allocating the skb and
re-check with lock to be safe.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Reviewed-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
net/netlink/af_netlink.c diff | blob | blame | history