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linux/tools/testing/selftests/net
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Fernando Fernandez Mancera dde1a6084c selftests: nft_queue.sh: add a parallel stress test 
Introduce a new stress test to check for race conditions in the
nfnetlink_queue subsystem, where an entry is freed while another CPU is
concurrently walking the global rhashtable.

To trigger this, `nf_queue.c` is extended with two new flags:
  * -O (out-of-order): Buffers packet IDs and flushes them in reverse.
  * -b (bogus verdicts): Floods the kernel with non-existent packet IDs.

The bogus verdict loop forces the kernel's lookup function to perform
full rhashtable bucket traversals (-ENOENT). Combined with reverse-order
flushing and heavy parallel UDP/ping flooding across 8 queues, this puts
the nfnetlink_queue code under pressure.

Joint work with Florian Westphal.

Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
2026-04-08 13:34:51 +02:00
..
af_unix
Merge tag 'net-6.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-12-19 07:55:35 +12:00
bench
selftests: pp-bench: remove page_pool_put_page wrapper
2025-07-01 17:42:11 -07:00
can
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
forwarding
selftests: net: bridge_vlan_mcast: wait for h1 before querier check
2026-04-07 20:16:16 -07:00
hsr
selftests: hsr: Add more link fault tests for HSR
2026-02-10 12:02:29 +01:00
lib
selftests: net: fix wrong boolean evaluation in __exit__
2026-01-26 19:32:20 -08:00
mptcp
selftests: mptcp: join: check removing signal+subflow endp
2026-03-04 18:21:13 -08:00
netfilter
selftests: nft_queue.sh: add a parallel stress test
2026-04-08 13:34:51 +02:00
openvswitch
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-09-18 11:26:06 -07:00
ovpn
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
packetdrill
selftests/net: packetdrill: restore tcp_rcv_big_endseq.pkt
2026-03-02 18:47:46 -08:00
rds
selftests: net: unify the Makefile formats
2025-10-06 13:14:06 -07:00
tcp_ao
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
.gitignore
selftests: net: Add kernel selftest for RFC 4884
2026-01-22 18:29:49 -08:00
altnames.sh
…
amt.sh
selftests: net: amt: wait longer for connection before sending packets
2026-01-21 19:20:30 -08:00
arp_ndisc_evict_nocarrier.sh
selftests: net: add a hint about MACAddressPolicy=persistent
2025-12-01 12:02:13 -08:00
arp_ndisc_untracked_subnets.sh
selftests/net: use tc rule to filter the na packet
2024-05-21 13:25:11 +02:00
bareudp.sh
selftests: net: use BASH for bareudp testing
2025-10-29 17:56:03 -07:00
big_tcp.sh
selftests: net: let big_tcp test cope with slow env
2024-02-05 12:36:16 +00:00
bind_bhash.c
selftest: net: Fix weird setsockopt() in bind_bhash.c.
2025-09-04 07:30:04 -07:00
bind_bhash.sh
selftests/net: Improve bind_bhash.sh to accommodate predictable network interface names
2023-09-10 18:49:29 +01:00
bind_timewait.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
bind_wildcard.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
bpf_offload.py
selftests: net: bpf_offload: print loaded programs on mismatch
2025-08-20 19:28:03 -07:00
bpf.mk
selftests: net: extract BPF building logic from the Makefile
2024-04-24 20:15:45 -07:00
bridge_vlan_dump.sh
selftests: net: Add bridge VLAN range grouping tests
2026-02-26 19:24:29 -08:00
broadcast_ether_dst.sh
selftests: net: add test for destination in broadcast packets
2025-09-09 11:29:58 +02:00
broadcast_pmtu.sh
selftests: net: add test for variable PMTU in broadcast routes
2025-07-14 17:29:41 -07:00
busy_poll_test.sh
selftests: Add napi threaded busy poll test in busy_poller
2025-11-03 18:11:40 -08:00
busy_poller.c
selftests: Add napi threaded busy poll test in busy_poller
2025-11-03 18:11:40 -08:00
cmsg_ip.sh
selftests/net: expand cmsg_ip with MSG_MORE
2025-03-10 13:13:04 -07:00
cmsg_sender.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
cmsg_so_mark.sh
selftests/net: convert cmsg tests to make them run in unique namespace
2023-12-05 13:00:56 +01:00
cmsg_so_priority.sh
selftests: net: test SO_PRIORITY ancillary data with cmsg_sender
2024-12-16 18:14:12 -08:00
cmsg_time.sh
selftests: net: give up on the cmsg_time accuracy on slow machines
2025-01-17 18:36:14 -08:00
config
selftests: net: tests for add double tunneling GRO/GSO
2026-01-23 11:31:14 -08:00
double_udp_encap.sh
selftests: net: tests for add double tunneling GRO/GSO
2026-01-23 11:31:14 -08:00
drop_monitor_tests.sh
selftests: net: lib: Add kill_process
2024-11-15 16:39:19 -08:00
epoll_busy_poll.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
fcnal-ipv4.sh
selftests: net: run groups from fcnal-test in parallel
2025-09-09 15:34:11 -07:00
fcnal-ipv6.sh
selftests: net: run groups from fcnal-test in parallel
2025-09-09 15:34:11 -07:00
fcnal-other.sh
selftests: net: run groups from fcnal-test in parallel
2025-09-09 15:34:11 -07:00
fcnal-test.sh
selftests: net: add ipv6 ping to local address from localhost
2026-01-25 13:16:47 -08:00
fdb_flush.sh
selftests: net: Fix few spelling mistakes
2025-02-18 18:10:31 -08:00
fdb_notify.sh
selftests: net: lib: Rename ip_link_set_master() to adf_*
2025-09-26 17:48:37 -07:00
fib_nexthop_multiprefix.sh
selftests/net: convert fib_nexthop_multiprefix to run it in unique namespace
2023-12-14 18:38:35 -08:00
fib_nexthop_nongw.sh
selftests/net: convert fib_nexthop_nongw.sh to run it in unique namespace
2023-12-14 18:38:35 -08:00
fib_nexthops.sh
selftests: net: add test for IPv4 route with loopback IPv6 nexthop
2026-03-05 07:53:17 -08:00
fib_rule_tests.sh
selftests: net: remove redundant rp_filter configuration
2025-05-12 18:10:55 -07:00
fib_tests.sh
selftest: net: Add GC test for temporary routes with exceptions.
2026-03-23 16:59:31 -07:00
fib-onlink-tests.sh
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-01-22 20:14:36 -08:00
fin_ack_lat.c
…
fin_ack_lat.sh
…
fq_band_pktlimit.sh
selftests/net: calibrate fq_band_pktlimit
2024-01-31 11:11:09 +00:00
gre_gso.sh
selftests/net: convert gre_gso.sh to run it in unique namespace
2023-12-23 00:26:32 +00:00
gre_ipv6_lladdr.sh
selftests: Add IPv6 multicast route generation tests for GRE devices.
2025-07-10 18:11:04 -07:00
hwtstamp_config.c
selftests/net: replace manual array size calc with ARRAYSIZE macro.
2023-07-18 17:43:51 -07:00
icmp_redirect.sh
selftests: net: remove redundant rp_filter configuration
2025-05-12 18:10:55 -07:00
icmp_rfc4884.c
selftests: net: Add kernel selftest for RFC 4884
2026-01-22 18:29:49 -08:00
icmp.sh
sleftests/net: convert icmp.sh to run it in unique namespace
2023-12-05 13:00:56 +01:00
in_netns.sh
…
io_uring_zerocopy_tx.c
selftests/net: io_uring: fix unknown errnum values
2025-10-17 16:57:53 -07:00
io_uring_zerocopy_tx.sh
selftests/net: optmem_max became per netns
2023-12-15 11:01:27 +00:00
ioam6_parser.c
selftests: net: add new ioam tests
2024-10-04 15:34:07 -07:00
ioam6.sh
ipv6: preserve insertion order for same-scope addresses
2026-01-06 16:41:35 -08:00
ip6_gre_headroom.sh
…
ip_defrag.c
…
ip_defrag.sh
…
ip_local_port_range.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
ip_local_port_range.sh
selftests/net: ensure mptcp is enabled in netns
2025-02-25 18:13:28 -08:00
ipsec.c
selftests/net/ipsec: Fix variable size type not at the end of struct
2026-01-12 19:15:04 -08:00
ipv6_flowlabel_mgr.c
…
ipv6_flowlabel.c
ping: support ipv6 ping socket flow labels
2022-07-22 12:40:27 +01:00
ipv6_flowlabel.sh
ping: support ipv6 ping socket flow labels
2022-07-22 12:40:27 +01:00
ipv6_force_forwarding.sh
ipv6: add force_forwarding sysctl to enable per-interface forwarding
2025-07-25 13:06:19 -07:00
ipv6_fragmentation.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
ipv6_route_update_soft_lockup.sh
selftests: net: move wait_local_port_listen to lib.sh
2025-05-27 17:31:42 -07:00
ipvtap_test.sh
selftests: net: simple selftest for ipvtap
2026-01-19 10:03:31 -08:00
l2_tos_ttl_inherit.sh
selftests/net: l2_tos_ttl_inherit.sh: Ensure environment cleanup on failure.
2023-01-10 10:13:52 +01:00
l2tp.sh
selftests/net: convert l2tp.sh to run it in unique namespace
2023-12-05 13:00:56 +01:00
lib.sh
selftests: net: lib: Fix jq parsing error
2026-02-12 18:41:18 -08:00
link_netns.py
selftests: net: Add test cases for link and peer netns
2025-02-21 15:28:03 -08:00
lwt_dst_cache_ref_loop.sh
selftests: net: test for lwtunnel dst ref loops
2025-03-20 11:25:52 +01:00
Makefile
selftests: seg6: add test for dst_cache isolation in seg6 lwtunnel
2026-04-07 20:20:56 -07:00
msg_zerocopy.c
selftest: net: extend msg_zerocopy test with forwarding
2025-07-02 15:07:16 -07:00
msg_zerocopy.sh
selftest: net: extend msg_zerocopy test with forwarding
2025-07-02 15:07:16 -07:00
nat6to4.bpf.c
selftests: net: name bpf objects consistently and simplify Makefile
2024-04-24 20:15:45 -07:00
nat6to4.sh
selftests: net: add test case for NAT46 looping back dst
2025-06-11 17:02:29 -07:00
ndisc_unsolicited_na_test.sh
selftests/net: convert ndisc_unsolicited_na_test.sh to run it in unique namespace
2023-12-05 13:00:56 +01:00
netdev-l2addr.sh
selftests: net: add netdev-l2addr.sh for testing L2 address functionality
2025-07-11 17:00:18 -07:00
netdevice.sh
selftests: net: Use XFAIL for operations not supported by the driver
2024-08-22 16:56:06 -07:00
netlink-dumps.c
Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-12-06 14:01:20 -08:00
netns-name.sh
selftests: net: use netdevsim in netns test
2025-04-03 15:32:09 -07:00
netns-sysctl.sh
selftests: net: tests net.core.{r,w}mem_{default,max} sysctls in a netns
2024-06-01 16:03:21 -07:00
nettest.c
selftests: nettest: Fix typo in log and error messages for clarity
2025-06-17 16:22:59 -07:00
nl_netdev.py
net: define an enum for the napi threaded state
2025-07-24 18:34:55 -07:00
pmtu.sh
selftests: net: speed up pmtu.sh by avoiding unnecessary cleanup
2025-09-09 16:26:44 -07:00
proc_net_pktgen.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
psock_fanout.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
psock_lib.h
selftests: centralise maybe-unused definition in kselftest.h
2025-09-13 16:55:16 -07:00
psock_snd.c
selftests/net: enable lo.accept_local in psock_snd test
2022-05-25 21:58:35 -07:00
psock_snd.sh
…
psock_tpacket.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
reuseaddr_conflict.c
selftests: reuseaddr_conflict: add missing new line at the end of the output
2024-04-01 20:42:45 -07:00
reuseaddr_ports_exhausted.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
reuseaddr_ports_exhausted.sh
…
reuseport_addr_any.c
selftest: net: Remove DCCP bits.
2025-04-11 18:58:10 -07:00
reuseport_addr_any.sh
…
reuseport_bpf_cpu.c
…
reuseport_bpf_numa.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
reuseport_bpf.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
reuseport_dualstack.c
…
route_hint.sh
selftests: net: add test for dst hint mechanism with directed broadcast addresses
2025-08-25 16:07:16 -07:00
route_localnet.sh
selftests: net: change ifconfig with ip command
2023-10-24 13:53:39 -07:00
rps_default_mask.sh
selftests: net: fix spelling and grammar mistakes
2025-09-01 13:08:07 -07:00
rtnetlink_notification.sh
selftest: add selftest for anycast notifications
2025-06-22 17:32:04 +01:00
rtnetlink.py
netlink: specs: rt_addr: pull the ifa- prefix out of the names
2025-04-04 07:36:06 -07:00
rtnetlink.sh
selftests: rtnetlink: add neighbour update test
2026-03-11 19:04:55 -07:00
run_afpackettests
…
run_netsocktests
…
rxtimestamp.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
rxtimestamp.sh
…
sample_map_ret0.bpf.c
selftests: net: declare section names for bpf_offload
2024-04-10 14:03:12 -07:00
sample_ret0.bpf.c
selftests: net: declare section names for bpf_offload
2024-04-10 14:03:12 -07:00
sctp_hello.c
selftests: net: fix server bind failure in sctp_vrf.sh
2025-10-20 16:41:33 -07:00
sctp_vrf.sh
selftests: net: fix server bind failure in sctp_vrf.sh
2025-10-20 16:41:33 -07:00
settings
selftests/net: convert fcnal-test.sh to run it in unique namespace
2023-12-14 18:38:35 -08:00
sk_bind_sendto_listen.c
selftests/net: Add sk_bind_sendto_listen and sk_connect_zero_addr
2022-08-24 19:30:09 -07:00
sk_connect_zero_addr.c
selftests/net: Add sk_bind_sendto_listen and sk_connect_zero_addr
2022-08-24 19:30:09 -07:00
sk_so_peek_off.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
skf_net_off.c
selftests/net: test sk_filter support for SKF_NET_OFF on frags
2025-04-09 20:02:51 -07:00
skf_net_off.sh
selftests/net: test sk_filter support for SKF_NET_OFF on frags
2025-04-09 20:02:51 -07:00
so_incoming_cpu.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
so_netns_cookie.c
…
so_rcv_listener.c
selftests: net: add support for testing SO_RCVMARK and SO_RCVPRIORITY
2025-02-17 16:45:19 -08:00
so_txtime.c
selftests/net: initialize char variable to null
2025-11-26 15:23:27 -08:00
so_txtime.sh
selftests: net: cope with slow env in so_txtime.sh test
2024-02-13 10:10:44 -08:00
socket.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
srv6_end_dt4_l3vpn_test.sh
selftests: net: use setup_ns for SRv6 tests and remove rp_filter configuration
2025-05-12 18:10:55 -07:00
srv6_end_dt6_l3vpn_test.sh
selftests/net: convert srv6_end_dt6_l3vpn_test.sh to run it in unique namespace
2023-12-14 18:38:35 -08:00
srv6_end_dt46_l3vpn_test.sh
selftests: net: use setup_ns for SRv6 tests and remove rp_filter configuration
2025-05-12 18:10:55 -07:00
srv6_end_dx4_netfilter_test.sh
selftests: add selftest for the SRv6 End.DX4 behavior with netfilter
2024-06-19 18:42:10 +02:00
srv6_end_dx6_netfilter_test.sh
selftests: add selftest for the SRv6 End.DX6 behavior with netfilter
2024-06-19 18:42:10 +02:00
srv6_end_flavors_test.sh
selftests: net: Fix spellings
2025-05-20 18:14:08 -07:00
srv6_end_next_csid_l3vpn_test.sh
selftests: seg6: fix instaces typo in comments
2025-07-01 19:32:45 -07:00
srv6_end_x_next_csid_l3vpn_test.sh
selftests: seg6: fix instaces typo in comments
2025-07-01 19:32:45 -07:00
srv6_hencap_red_l3vpn_test.sh
selftests: seg6: fix instaces typo in comments
2025-07-01 19:32:45 -07:00
srv6_hl2encap_red_l2vpn_test.sh
selftests: seg6: fix instaces typo in comments
2025-07-01 19:32:45 -07:00
srv6_iptunnel_cache.sh
selftests: seg6: add test for dst_cache isolation in seg6 lwtunnel
2026-04-07 20:20:56 -07:00
stress_reuseport_listen.c
net: selftests: Stress reuseport listen
2022-05-12 16:52:18 -07:00
stress_reuseport_listen.sh
selftests/net: convert stress_reuseport_listen.sh to run it in unique namespace
2023-12-23 00:26:32 +00:00
tap.c
selftests: net: fix "buffer overflow detected" for tap.c
2025-12-23 12:30:23 +01:00
tcp_fastopen_backup_key.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
tcp_fastopen_backup_key.sh
…
tcp_inq.c
…
tcp_mmap.c
selftests/net: report rcv_mss in tcp_mmap
2023-08-02 11:40:49 +01:00
tcp_port_share.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
test_bpf.sh
…
test_bridge_backup_port.sh
selftests: net: Test bridge backup port when port is administratively down
2025-08-14 17:45:36 -07:00
test_bridge_neigh_suppress.sh
selftests: test_bridge_neigh_suppress: Test unicast ARP/NS with suppression
2025-04-09 19:13:43 -07:00
test_ingress_egress_chaining.sh
selftests: add selftest for chaining of tc ingress handling to egress
2022-10-19 14:04:36 +01:00
test_neigh.sh
selftests: net: Fix flaky neighbor garbage collection test
2025-08-01 13:51:41 -07:00
test_so_rcv.sh
selftests: net: add support for testing SO_RCVMARK and SO_RCVPRIORITY
2025-02-17 16:45:19 -08:00
test_vxlan_fdb_changelink.sh
selftests: net: lib: Rename ip_link_set_up() to adf_*
2025-09-26 17:48:37 -07:00
test_vxlan_mdb.sh
selftests: vxlan_mdb: Fix failures with old libnet
2024-03-26 12:29:25 +01:00
test_vxlan_nh.sh
selftests: net: Add a selftest for VXLAN with FDB nexthop groups
2025-09-02 16:57:00 -07:00
test_vxlan_nolocalbypass.sh
selftests/net: convert test_vxlan_nolocalbypass.sh to run it in unique namespace
2023-12-08 12:12:16 +00:00
test_vxlan_under_vrf.sh
selftests/net: convert test_vxlan_under_vrf.sh to run it in unique namespace
2023-12-08 12:12:16 +00:00
test_vxlan_vnifiltering.sh
selftests: net: use slowwait to make sure IPv6 setup finished
2025-06-19 15:24:09 +02:00
tfo_passive.sh
selftests: net: fix passive TFO test to fail if child processes failed
2026-01-17 18:01:26 -08:00
tfo.c
selftests: net: improve error handling in passive TFO test
2026-01-17 18:01:26 -08:00
timestamping.c
…
tls.c
selftests: tls: avoid flakiness in data_steal
2026-01-09 17:33:28 -08:00
traceroute.sh
selftests: traceroute: Add ICMP extensions tests
2025-10-29 18:28:30 -07:00
tun.c
selftests: net: tun: don't abort XFAIL cases
2026-03-05 07:34:55 -08:00
tuntap_helpers.h
selftest: tun: Introduce tuntap_helpers.h header for TUN/TAP testing
2026-01-23 11:43:28 -08:00
txring_overwrite.c
…
txtimestamp.c
selftests: net: reduce txtimestamp deschedule flakes
2026-01-13 11:46:39 -08:00
txtimestamp.sh
selftests: txtimestamp: add SCM_TS_OPT_ID test
2024-10-04 11:52:20 -07:00
udpgro_bench.sh
selftests: net: move wait_local_port_listen to lib.sh
2025-05-27 17:31:42 -07:00
udpgro_frglist.sh
selftests: net: move wait_local_port_listen to lib.sh
2025-05-27 17:31:42 -07:00
udpgro_fwd.sh
selftest: net: add a test-case for encap segmentation after GRO
2026-02-03 19:23:41 -08:00
udpgro.sh
selftests: net: increase inter-packet timeout in udpgro.sh
2025-07-15 15:26:47 +02:00
udpgso_bench_rx.c
selftests: net: cut more slack for gro fwd tests.
2024-02-02 21:10:36 -08:00
udpgso_bench_tx.c
selftests: complete kselftest include centralization
2025-11-27 14:24:31 -08:00
udpgso_bench.sh
selftests/net: call sendmmsg via udpgso_bench.sh
2024-12-04 19:22:20 -08:00
udpgso.c
udp: gso: do not drop small packets when PMTU reduces
2025-02-03 10:13:27 +00:00
udpgso.sh
selftests/net: Add test coverage for UDP GSO software fallback
2024-06-28 18:13:00 -07:00
unicast_extensions.sh
selftests: net: add helper for checking if nettest is available
2024-08-22 12:55:47 +02:00
veth.sh
selftests: net: use the dummy bpf from net/lib
2025-03-31 16:44:25 -07:00
vlan_bridge_binding.sh
selftests: net: check jq command is supported
2025-10-14 15:12:18 +02:00
vlan_hw_filter.sh
selftests: avoid using ifconfig
2025-08-01 14:40:19 -07:00
vrf_route_leaking.sh
selftests: net: use slowwait to stabilize vrf_route_leaking test
2025-06-19 15:24:08 +02:00
vrf_strict_mode_test.sh
selftests/net: convert vrf_strict_mode_test.sh to run it in unique namespace
2023-12-08 12:12:16 +00:00
vrf-xfrm-tests.sh
selftests/net: convert vrf-xfrm-tests.sh to run it in unique namespace
2023-12-08 12:12:16 +00:00
xfrm_policy_add_speed.sh
selftests: add xfrm policy insertion speed test script
2024-08-24 09:55:01 +02:00
xfrm_policy.sh
selftests/net: reduce xfrm_policy test time
2024-05-16 19:30:12 -07:00
ynl.mk
selftests: net: move netlink-dumps back to progs
2025-09-08 12:57:05 -07:00