Andrea Righi f28cd2af22 openvswitch: fix flow actions reallocation ... The flow action buffer can be resized if it's not big enough to contain all the requested flow actions. However, this resize doesn't take into account the new requested size, the buffer is only increased by a factor of 2x. This might be not enough to contain the new data, causing a buffer overflow, for example: [ 42.044472] ============================================================================= [ 42.045608] BUG kmalloc-96 (Not tainted): Redzone overwritten [ 42.046415] ----------------------------------------------------------------------------- [ 42.047715] Disabling lock debugging due to kernel taint [ 42.047716] INFO: 0x8bf2c4a5-0x720c0928. First byte 0x0 instead of 0xcc [ 42.048677] INFO: Slab 0xbc6d2040 objects=29 used=18 fp=0xdc07dec4 flags=0x2808101 [ 42.049743] INFO: Object 0xd53a3464 @offset=2528 fp=0xccdcdebb [ 42.050747] Redzone 76f1b237: cc cc cc cc cc cc cc cc ........ [ 42.051839] Object d53a3464: 6b 6b 6b 6b 6b 6b 6b 6b 0c 00 00 00 6c 00 00 00 kkkkkkkk....l... [ 42.053015] Object f49a30cc: 6c 00 0c 00 00 00 00 00 00 00 00 03 78 a3 15 f6 l...........x... [ 42.054203] Object acfe4220: 20 00 02 00 ff ff ff ff 00 00 00 00 00 00 00 00 ............... [ 42.055370] Object 21024e91: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 42.056541] Object 070e04c3: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 42.057797] Object 948a777a: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 42.059061] Redzone 8bf2c4a5: 00 00 00 00 .... [ 42.060189] Padding a681b46e: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ Fix by making sure the new buffer is properly resized to contain all the requested data. BugLink: https://bugs.launchpad.net/bugs/1813244 Signed-off-by: Andrea Righi <andrea.righi@canonical.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-03-28 17:15:44 -07:00
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Kconfig	netfilter: nat: merge nf_nat_ipv4,6 into nat core	2019-02-27 10:49:55 +01:00
Makefile	openvswitch: Add meter infrastructure	2017-11-13 10:37:07 +09:00
actions.c	OVS: remove use of VLAN_TAG_PRESENT	2018-11-08 19:49:31 -08:00
conntrack.c	netfilter: nat: remove nf_nat_l3proto.h and nf_nat_core.h	2019-02-27 10:54:08 +01:00
conntrack.h	openvswitch: Support conntrack zone limit	2018-05-25 16:45:19 -04:00
datapath.c	net: openvswitch: fix missing checks for nla_nest_start	2019-03-16 11:43:14 -07:00
datapath.h	openvswitch: Support conntrack zone limit	2018-05-25 16:45:19 -04:00
dp_notify.c	openvswitch: reliable interface indentification in port dumps	2017-11-05 21:49:17 +09:00
flow.c	openvswitch: Fix IPv6 later frags parsing	2019-01-04 13:00:02 -08:00
flow.h	openvswitch: convert to kvmalloc	2019-03-12 10:04:02 -07:00
flow_netlink.c	openvswitch: fix flow actions reallocation	2019-03-28 17:15:44 -07:00
flow_netlink.h	openvswitch: convert to kvmalloc	2019-03-12 10:04:02 -07:00
flow_table.c	openvswitch: convert to kvmalloc	2019-03-12 10:04:02 -07:00
flow_table.h	openvswitch: convert to kvmalloc	2019-03-12 10:04:02 -07:00
meter.c	openvswitch: meter: Use struct_size() in kzalloc()	2019-01-16 21:10:47 -08:00
meter.h	openvswitch: Add meter infrastructure	2017-11-13 10:37:07 +09:00
vport-geneve.c	net: core: dev: Add extack argument to dev_change_flags()	2018-12-06 13:26:07 -08:00
vport-gre.c	net: core: dev: Add extack argument to dev_change_flags()	2018-12-06 13:26:07 -08:00
vport-internal_dev.c	net: ovs: fix return type of ndo_start_xmit function	2018-09-28 10:25:11 -07:00
vport-internal_dev.h	openvswitch: introduce rtnl ops stub	2014-07-01 14:40:17 -07:00
vport-netdev.c	openvswitch: remove BUG_ON from get_dpdev	2018-11-08 17:14:59 -08:00
vport-netdev.h	openvswitch: Use dev_queue_xmit for vport send.	2015-10-22 06:46:16 -07:00
vport-vxlan.c	net: core: dev: Add extack argument to dev_change_flags()	2018-12-06 13:26:07 -08:00
vport.c	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
vport.h	openvswitch: pass mac_proto to ovs_vport_send	2016-11-13 00:51:02 -05:00