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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
..
6lowpan 6lowpan: fix debugfs interface entry name 2015-12-20 08:21:00 +01:00
9p ... and a couple in net/9p 2016-01-04 10:29:17 -05:00
802
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8021q net: Rename NETIF_F_ALL_CSUM to NETIF_F_CSUM_MASK 2015-12-15 16:50:08 -05:00
appletalk
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atm net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
ax25 net: add validation for the socket syscall protocol argument 2015-12-14 16:09:30 -05:00
batman-adv batman-adv: Drop immediate orig_node free function 2016-01-16 22:50:00 +08:00
bluetooth Bluetooth: avoid rebuilding hci_sock all the time 2016-01-06 16:36:44 +01:00
bridge bridge: fix lockdep addr_list_lock false positive splat 2016-01-15 15:40:45 -05:00
caif net: rename SOCK_ASYNC_NOSPACE and SOCK_ASYNC_WAITDATA 2015-12-01 15:45:05 -05:00
can can: avoid using timeval for uapi 2015-10-13 17:42:34 +02:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2015-11-13 09:24:40 -08:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-15 13:33:12 -08:00
dcb net/dcb: make dcbnl.c explicitly non-modular 2015-10-09 07:52:27 -07:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-03 21:09:12 -05:00
decnet net: add validation for the socket syscall protocol argument 2015-12-14 16:09:30 -05:00
dns_resolver net: dns_resolver: convert time_t to time64_t 2015-11-18 16:27:46 -05:00
dsa dsa: Register netdev before phy 2016-01-07 14:31:26 -05:00
ethernet net: Add eth_platform_get_mac_address() helper. 2016-01-06 16:31:56 -05:00
hsr net/hsr: fix a warning message 2015-11-23 14:56:15 -05:00
ieee802154 inet: kill unused skb_free op 2016-01-05 22:25:57 -05:00
ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-15 13:33:12 -08:00
ipv6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-15 13:33:12 -08:00
ipx
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irda net: add validation for the socket syscall protocol argument 2015-12-14 16:09:30 -05:00
iucv iucv: call skb_linearize() when needed 2015-12-14 16:16:44 -05:00
key af_key: fix two typos 2015-10-23 03:05:19 -07:00
l2tp l2tp: rely on ppp layer for skb scrubbing 2016-01-04 16:45:24 -05:00
l3mdev net: Add netif_is_l3_slave 2015-10-07 04:27:43 -07:00
lapb
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llc tcp: fix recv with flags MSG_WAITALL | MSG_PEEK 2015-07-27 01:06:53 -07:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-17 22:08:28 -05:00
mac802154 mac802154: constify ieee802154_llsec_ops structure 2016-01-04 20:40:41 +01:00
mpls Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-17 22:08:28 -05:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-01-08 20:53:16 -05:00
netlabel
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netlink genetlink: Fix off-by-one in genl_allocate_reserve_groups() 2016-01-13 10:28:06 -05:00
netrom
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nfc NFC 4.5 pull request 2016-01-04 21:48:15 -05:00
openvswitch ovs: limit ovs recursions in ovs_execute_actions to not corrupt stack 2016-01-18 12:09:45 -05:00
packet packet: Allow packets with only a header (but no payload) 2015-11-29 22:17:17 -05:00
phonet phonet: properly unshare skbs in phonet_rcv() 2016-01-12 12:05:38 -05:00
rds RDS: don't pretend to use cpu notifiers 2015-12-22 15:23:05 -05:00
rfkill Bluetooth: hci_bcm: move all Broadcom ACPI IDs to BCM HCI driver 2016-01-04 19:22:05 +01:00
rose
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rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
sched Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-11 23:55:43 -05:00
sctp sctp: the temp asoc's transports should not be hashed/unhashed 2016-01-17 19:11:44 -05:00
sunrpc Smaller bugfixes and cleanup, including a fix for a failures of 2016-01-15 12:49:44 -08:00
switchdev switchdev: Adding MDB entry offload 2016-01-10 16:50:20 -05:00
tipc ip_tunnel: Move stats update to iptunnel_xmit() 2015-12-25 23:32:23 -05:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-11 23:55:43 -05:00
vmw_vsock Revert "Merge branch 'vsock-virtio'" 2015-12-08 21:55:49 -05:00
wimax net:wimax: Fix doucble word "the the" in networking.xml 2015-08-09 22:43:52 -07:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-17 22:08:28 -05:00
x25
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xfrm net: preserve IP control block during GSO segmentation 2016-01-15 14:35:24 -05:00
Kconfig net, sched: add clsact qdisc 2016-01-10 22:13:15 -05:00
Makefile net: Introduce L3 Master device abstraction 2015-09-29 20:40:32 -07:00
compat.c
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socket.c kmemcg: account certain kmem allocations to memcg 2016-01-14 16:00:49 -08:00
sysctl_net.c net: sysctl: fix a kmemleak warning 2015-10-23 06:22:08 -07:00