linux-stable/net/openvswitch
Hannes Frederic Sowa b064d0d88a ovs: limit ovs recursions in ovs_execute_actions to not corrupt stack
It was seen that defective configurations of openvswitch could overwrite
the STACK_END_MAGIC and cause a hard crash of the kernel because of too
many recursions within ovs.

This problem arises due to the high stack usage of openvswitch. The rest
of the kernel is fine with the current limit of 10 (RECURSION_LIMIT).

We use the already existing recursion counter in ovs_execute_actions to
implement an upper bound of 5 recursions.

Cc: Pravin Shelar <pshelar@ovn.org>
Cc: Simon Horman <simon.horman@netronome.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-18 12:09:45 -05:00
..
actions.c ovs: limit ovs recursions in ovs_execute_actions to not corrupt stack 2016-01-18 12:09:45 -05:00
conntrack.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-31 18:20:10 -05:00
conntrack.h openvswitch: Fix double-free on ip_defrag() errors 2015-10-27 19:32:14 -07:00
datapath.c net: preserve IP control block during GSO segmentation 2016-01-15 14:35:24 -05:00
datapath.h openvswitch: Fix egress tunnel info. 2015-10-22 19:39:25 -07:00
dp_notify.c openvswitch: fix hangup on vxlan/gre/geneve device deletion 2015-12-03 14:29:25 -05:00
flow.c openvswitch: add tunnel protocol to sw_flow_key 2015-10-07 04:17:59 -07:00
flow.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-20 06:08:27 -07:00
flow_netlink.c openvswitch: correct encoding of set tunnel action attributes 2015-12-18 16:35:35 -05:00
flow_netlink.h openvswitch: Fix egress tunnel info. 2015-10-22 19:39:25 -07:00
flow_table.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-20 06:08:27 -07:00
flow_table.h openvswitch: Zero flows on allocation. 2015-09-22 17:33:41 -07:00
Kconfig openvswitch: Fix dependency on IPv6 defrag. 2015-09-11 15:39:04 -07:00
Makefile openvswitch: Remove conntrack Kconfig option. 2015-09-06 23:48:33 -07:00
vport-geneve.c openvswitch: fix struct geneve_port member name 2016-01-10 23:49:21 -05:00
vport-gre.c openvswitch: properly refcount vport-vxlan module 2015-12-02 11:50:59 -05:00
vport-internal_dev.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-24 06:54:12 -07:00
vport-internal_dev.h openvswitch: introduce rtnl ops stub 2014-07-01 14:40:17 -07:00
vport-netdev.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-03 21:09:12 -05:00
vport-netdev.h openvswitch: Use dev_queue_xmit for vport send. 2015-10-22 06:46:16 -07:00
vport-vxlan.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-24 06:54:12 -07:00
vport.c openvswitch: properly refcount vport-vxlan module 2015-12-02 11:50:59 -05:00
vport.h openvswitch: update kernel doc for struct vport 2016-01-10 23:49:21 -05:00