Faicker Mo 8ebcd311b4 net: openvswitch: Fix the dead loop of MPLS parse ... [ Upstream commit 0bdc924bfb319fb10d1113cbf091fc26fb7b1f99 ] The unexpected MPLS packet may not end with the bottom label stack. When there are many stacks, The label count value has wrapped around. A dead loop occurs, soft lockup/CPU stuck finally. stack backtrace: UBSAN: array-index-out-of-bounds in /build/linux-0Pa0xK/linux-5.15.0/net/openvswitch/flow.c:662:26 index -1 is out of range for type '__be32 [3]' CPU: 34 PID: 0 Comm: swapper/34 Kdump: loaded Tainted: G OE 5.15.0-121-generic #131-Ubuntu Hardware name: Dell Inc. PowerEdge C6420/0JP9TF, BIOS 2.12.2 07/14/2021 Call Trace: <IRQ> show_stack+0x52/0x5c dump_stack_lvl+0x4a/0x63 dump_stack+0x10/0x16 ubsan_epilogue+0x9/0x36 __ubsan_handle_out_of_bounds.cold+0x44/0x49 key_extract_l3l4+0x82a/0x840 [openvswitch] ? kfree_skbmem+0x52/0xa0 key_extract+0x9c/0x2b0 [openvswitch] ovs_flow_key_extract+0x124/0x350 [openvswitch] ovs_vport_receive+0x61/0xd0 [openvswitch] ? kernel_init_free_pages.part.0+0x4a/0x70 ? get_page_from_freelist+0x353/0x540 netdev_port_receive+0xc4/0x180 [openvswitch] ? netdev_port_receive+0x180/0x180 [openvswitch] netdev_frame_hook+0x1f/0x40 [openvswitch] __netif_receive_skb_core.constprop.0+0x23a/0xf00 __netif_receive_skb_list_core+0xfa/0x240 netif_receive_skb_list_internal+0x18e/0x2a0 napi_complete_done+0x7a/0x1c0 bnxt_poll+0x155/0x1c0 [bnxt_en] __napi_poll+0x30/0x180 net_rx_action+0x126/0x280 ? bnxt_msix+0x67/0x80 [bnxt_en] handle_softirqs+0xda/0x2d0 irq_exit_rcu+0x96/0xc0 common_interrupt+0x8e/0xa0 </IRQ> Fixes: fbdcdd78da ("Change in Openvswitch to support MPLS label depth of 3 in ingress direction") Signed-off-by: Faicker Mo <faicker.mo@zenlayer.com> Acked-by: Ilya Maximets <i.maximets@ovn.org> Reviewed-by: Aaron Conole <aconole@redhat.com> Link: https://patch.msgid.link/259D3404-575D-4A6D-B263-1DF59A67CF89@zenlayer.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-06-19 15:28:19 +02:00
..
actions.c	openvswitch: Fix unsafe attribute parsing in output_userspace()	2025-05-18 08:24:04 +02:00
conntrack.c	openvswitch: get related ct labels from its master if it is not confirmed	2024-07-05 09:33:46 +02:00
conntrack.h
datapath.c	openvswitch: use RCU protection in ovs_vport_cmd_fill_info()	2025-02-21 13:57:23 +01:00
datapath.h
dp_notify.c
drop.h	net: openvswitch: add misc error drop reasons	2023-08-14 08:01:06 +01:00
flow_netlink.c	net: openvswitch: fix nested key length validation in the set() action	2025-04-25 10:45:42 +02:00
flow_netlink.h
flow_table.c	There is no particular theme here - mainly quick hits all over the tree.	2023-02-23 17:55:40 -08:00
flow_table.h
flow.c	net: openvswitch: Fix the dead loop of MPLS parse	2025-06-19 15:28:19 +02:00
flow.h	net: openvswitch: reduce cpu_used_mask memory	2023-02-06 22:36:29 -08:00
Kconfig	net: create nf_conntrack_ovs for ovs and tc use	2023-02-10 16:23:03 -08:00
Makefile
meter.c	genetlink: remove userhdr from struct genl_info	2023-08-15 14:54:44 -07:00
meter.h
openvswitch_trace.c
openvswitch_trace.h
vport-geneve.c	rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link	2022-10-31 18:10:21 -07:00
vport-gre.c	rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link	2022-10-31 18:10:21 -07:00
vport-internal_dev.c	openvswitch: Change the return type for vport_ops.send function hook to int	2022-09-19 18:28:50 -07:00
vport-internal_dev.h
vport-netdev.c	rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link	2022-10-31 18:10:21 -07:00
vport-netdev.h
vport-vxlan.c	rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link	2022-10-31 18:10:21 -07:00
vport.c	net: openvswitch: fix upcall counter access before allocation	2023-06-07 12:25:05 +01:00
vport.h	net: openvswitch: Add support to count upcall packets	2022-12-09 10:43:46 +00:00