Faicker Mo 0bdc924bfb net: openvswitch: Fix the dead loop of MPLS parse ... 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>		2025-05-28 09:03:02 +02:00
..
actions.c	openvswitch: Fix unsafe attribute parsing in output_userspace()	2025-05-07 16:51:02 -07:00
conntrack.c	Revert "openvswitch: switch to per-action label counting in conntrack"	2025-03-13 10:29:34 +01:00
conntrack.h
datapath.c	openvswitch: use RCU protection in ovs_vport_cmd_fill_info()	2025-02-10 18:09:09 -08:00
datapath.h	net: openvswitch: fix kernel-doc warnings in internal headers	2025-03-24 09:30:21 -07:00
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	2025-04-14 16:15:38 -07:00
flow_netlink.h
flow_table.c	net: openvswitch: Use struct_size()	2023-10-17 13:56:03 +02:00
flow_table.h	net: openvswitch: Annotate struct mask_array with __counted_by	2023-10-17 13:56:03 +02:00
flow.c	net: openvswitch: Fix the dead loop of MPLS parse	2025-05-28 09:03:02 +02:00
flow.h	net: openvswitch: reduce cpu_used_mask memory	2023-02-06 22:36:29 -08:00
Kconfig	lib/crc: remove CONFIG_LIBCRC32C	2025-04-04 11:31:42 -07:00
Makefile
meter.c	genetlink: remove userhdr from struct genl_info	2023-08-15 14:54:44 -07:00
meter.h	net: openvswitch: remove unnecessary linux/genetlink.h include	2024-04-01 21:44:34 -07:00
openvswitch_trace.c
openvswitch_trace.h	tracing/treewide: Remove second parameter of __assign_str()	2024-05-22 20:14:47 -04:00
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	net: rename netns_local to netns_immutable	2025-03-04 12:44:48 +01:00
vport-internal_dev.h
vport-netdev.c	net: openvswitch: Release reference to netdev	2024-04-24 17:07:17 -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: store sampling probability in cb.	2024-07-05 17:45:47 -07:00
vport.h	net: openvswitch: fix kernel-doc warnings in internal headers	2025-03-24 09:30:21 -07:00