kernel/git/stable/linux-stable.git/tools/testing/selftests/net, branch master

Merge tag 'net-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-08-27T20:53:43+00:00

Pull networking fixes from Jakub Kicinski: "Including fixes from Bluetooth, IPSec and Netfilter. Current release - fix to a fix: - netfilter: ipset: remove need to allocate memory on delete operations Current release - regressions: - macb: drop CONFIG_OF #if block, fix build Previous releases - always broken: - stream of fixes for SCTP continues - inet: frags: strip GSO state from fragments before reassembly - virtio-net: ensure that TCP packets don't overflow gso_segs - tcp-ao: fix use-after-free of current_key on reconnect to another peer - page_pool: remove zone/policy GFP flags when allocating XArray entries - Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN - tls: device: fix out-of-bounds write in tls_append_frag() - eth: bnxt: - ring the doorbell when SW USO exits early, avoid packets stuck in Tx - gate TPH enablement behind BNXT_SUPPORTS_QUEUE_API check, avoid users of older NICs seeing non-actionable warning messages - eth: qede: fix NULL pointer dereference in TPA fragment processing" * tag 'net-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (216 commits) inet: frags: strip GSO state from fragments before reassembly net/sched: sch_htb: limit htb_classify inner-class filter hops selftests/net: packetdrill: add tcp_urg_ptr_retransmit tcp: fix corruption of urgent data on multi-segment retransmit usb: atm: usbatm: fix invalid ci_range initialization net: fec: only stop PTP if it was initialized slip: remove slip_hangup() to fix use-after-free in slip_receive_buf() net: bridge: mcast: fix use-after-free of a master VLAN's multicast context net/sched: bound qdisc_pkt_len to prevent qdisc soft lockup net: dsa: mxl862xx: enable assisted learning on CPU port net: stmmac: restore NET_IP_ALIGN in the RX DMA offset net: stmmac: drop gso_enabled_types and rely on netdev features net: stmmac: selftests: Don't test flow control for small rx fifos net: stmmac: selftests: Account for the UC filter list for filtering tests net: stmmac: dwxgmac: Account for the primary MAC address for UC filtering net: stmmac: dwmac4: Account for the primary MAC address for UC filtering net: stmmac: dwmac1000: Account for the primary MAC address for UC filtering net: stmmac: selftests: Check multiple MMC counters selftests: net: Fix slow configurations in big_tcp_tunnels.sh selftests: net: Lower threshold with csum offload off in big_tcp_tunnels.sh ...

selftests/net: packetdrill: add tcp_urg_ptr_retransmit

2026-08-27T19:47:34+00:00

Drive a connection into urgent mode and force a multi-segment retransmit, checking that each retransmitted segment keeps its own urg_ptr. The test asserts the fixed behaviour: the hole is retransmitted as two independent skbs, each with its own urg_ptr (5001 and 4001) and no PSH. An unpatched kernel instead sends one super-skb whose GSO split copies urg_ptr onto the second segment and also sets PSH there, so on an unpatched kernel the mismatch shows up on the PSH bit (actual P.U ... urg 5001) before the urg_ptr: tcp_urg_ptr_retransmit.pkt:63: live packet field tcp_psh: expected: 0 (0x0) vs actual: 1 (0x1) script packet: .U 1001:2001(1000) ack 1 actual packet: P.U 1001:2001(1000) ack 1 win 1050 After the fix the retransmit carries a per-segment urg_ptr and the test passes. Signed-off-by: Jiayuan Chen Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20260826141145.67823-2-jiayuan.chen@linux.dev Signed-off-by: Jakub Kicinski

selftests: net: Fix slow configurations in big_tcp_tunnels.sh

2026-08-27T15:42:28+00:00

The combination of checksum offload disabled (that causes software GSO) and a debug kernel is inherently slow. Depending on the CPU power and load, RTT may increase, limiting sk_pacing_rate, so tcp_tso_autosize caps SKBs at around 40 segments, and zero BIG TCP packets are produced. Increase sysctl net.ipv4.tcp_min_tso_segs and set a bigger initial value of CWND in these configurations to force BIG TCP. Fixes: 5cb53743e1ff ("selftests: net: Add a test for BIG TCP in UDP tunnels") Signed-off-by: Alice Mikityanska Acked-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20260822120308.1165200-5-alice.kernel@fastmail.im Signed-off-by: Jakub Kicinski

selftests: net: Lower threshold with csum offload off in big_tcp_tunnels.sh

2026-08-27T15:42:28+00:00

With checksum offload disabled, much fewer BIG TCP packets are generated due to overall loss of throughput. Use a separate threshold in these tests, which is 1/10 of the threshold set for the rest of tests. Fixes: 5cb53743e1ff ("selftests: net: Add a test for BIG TCP in UDP tunnels") Signed-off-by: Alice Mikityanska Acked-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20260822120308.1165200-4-alice.kernel@fastmail.im Signed-off-by: Jakub Kicinski

selftests: net: Lower threshold on debug kernels for big_tcp_tunnels.sh

2026-08-27T15:42:28+00:00

Debug kernels on upstream CI runners run slower and generate fewer BIG TCP packets, making the test flaky on upstream CI runners. Lower the default threshold for those kernels. Fixes: 5cb53743e1ff ("selftests: net: Add a test for BIG TCP in UDP tunnels") Signed-off-by: Alice Mikityanska Acked-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20260822120308.1165200-3-alice.kernel@fastmail.im Signed-off-by: Jakub Kicinski

selftests: net: Wait for netserver to launch

2026-08-27T15:42:28+00:00

Use wait_local_port_listen after starting netserver in big_tcp_tunnels.sh to ensure it's listening when the test starts. Fixes: 5cb53743e1ff ("selftests: net: Add a test for BIG TCP in UDP tunnels") Signed-off-by: Alice Mikityanska Acked-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20260822120308.1165200-2-alice.kernel@fastmail.im Signed-off-by: Jakub Kicinski

selftests: net: tcp_ao: test VRF-scoped key deletion

2026-08-27T10:07:21+00:00

Verify that TCP_AO_DEL_KEY can remove a TCP-AO key scoped to a VRF. Assisted-by: Codex:GPT-5 Signed-off-by: Rastislav Szabo Reviewed-by: David Ahern Acked-by: Dmitry Safonov Link: https://patch.msgid.link/20260822201119.272269-2-rastislav.szabo@isovalent.com Signed-off-by: Paolo Abeni

selftests/net: check fork() return value in fin_ack_lat

2026-08-24T18:40:29+00:00

main() never checks fork() for failure. When fork() returns -1 (EAGAIN/ENOMEM/RLIMIT_NPROC), the !child_pid test is false and the process falls into server()'s infinite accept() loop with no client ever connecting, producing empty output. The wrapper script treats an empty log as a passing test, producing a false positive. Check fork() for failure with error(), as is done for every other syscall in this file. Signed-off-by: Qingshuang Fu Reviewed-by: Hangbin Liu Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260821031442.1124777-2-fffsqian@163.com Signed-off-by: Jakub Kicinski

selftests/net: fix kill() argument order and wrapper cleanup in fin_ack_lat

2026-08-24T18:40:25+00:00

sig_handler() passes its arguments to kill() in the wrong order: it sends signal number child_pid to PID SIGTERM (15) instead of sending SIGTERM to the client process. The call therefore always fails and the signal is never forwarded: when only the server process receives SIGTERM, the client keeps running its infinite connect loop as an orphan process. Swap the arguments so that the server forwards SIGTERM to the client. Guard the call with child_pid > 0: the client inherits the handler and sees child_pid == 0, and a plain argument swap would make it call kill(0, SIGTERM), signaling the whole process group instead of exiting quietly. Now that the server actually terminates the client before the wrapper script's cleanup runs, kill() may fail with ESRCH for the already-exited client. The script uses set -e, so make the kill tolerant to avoid aborting the EXIT trap and leaking temporary files. Signed-off-by: Qingshuang Fu Reviewed-by: Hangbin Liu Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260821031442.1124777-1-fffsqian@163.com Signed-off-by: Jakub Kicinski

selftests: net: packetdrill: add tests for advertised MSS with PMTU exceptions

2026-08-20T19:14:23+00:00

Add packetdrill tests for IPv4 and IPv6 to verify that the advertised MSS in SYN-ACK is derived from the configured interface/route MTU, and is not shrunk by learned Path MTU exceptions from previous outbound connections. Signed-off-by: Eric Dumazet Signed-off-by: Jiayuan Chen Link: https://patch.msgid.link/20260815071532.301908-1-jiayuan.chen@linux.dev Signed-off-by: Jakub Kicinski