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2026-02-26perf vendor events intel: Update lunarlake events from 1.19 to 1.21Ian Rogers
The updated events were published in: https://github.com/intel/perfmon/commit/d6755a30419d02930889497741552309343bdb1e https://github.com/intel/perfmon/commit/6c9f684ae1de6229511fd56d1196fdc2db242a41 Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf vendor events intel: Update graniterapids events from 1.16 to 1.17Ian Rogers
The updated events were published in: https://github.com/intel/perfmon/commit/c9ebc3ff9c3d408a888fbfbe73d386ef86c7306f With new IO and SNC metrics in: https://github.com/intel/perfmon/commit/04cf5e1e804afd775401167870d48cd25864be7b https://github.com/intel/perfmon/commit/98b2602d83de6625bae1e6fcaab3a39b0a341255 Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf vendor events intel: Update grandridge events from 1.10 to 1.11Ian Rogers
The updated events were published in: https://github.com/intel/perfmon/commit/8ada944c087300c4fc79afcd8512aa3b91bd34f2 Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf vendor events intel: Update emeraldrapid events from 1.20 to 1.21Ian Rogers
The updated events were published in: https://github.com/intel/perfmon/commit/210676cfa8743cd5b9e7cc984fdef1a48542eda4 Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf vendor events intel: Update arrowlake events from 1.14 to 1.16Ian Rogers
The updated events were published in: https://github.com/intel/perfmon/commit/f0267f720eeab3b5416886c9e0e132fafcb38bbd https://github.com/intel/perfmon/commit/d40cfa317e567fb5e8f6cbd92c81feeb7e6bd3dd Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf vendor events intel: Update alderlake events from 1.35 to 1.37Ian Rogers
The updated events were published in: https://github.com/intel/perfmon/commit/632936400cfc5978c7b4519c865c137de523bfdd https://github.com/intel/perfmon/commit/a96d6bf4b50d6ce31e2ffd0be8d13022d07ae319 Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26selftests: net: Add bridge VLAN range grouping testsDanielle Ratson
Add a new test file bridge_vlan_dump.sh with four test cases that verify VLANs with different per-VLAN options are not incorrectly grouped into ranges in the dump output. The tests verify the kernel's br_vlan_opts_eq_range() function correctly prevents VLAN range grouping when neigh_suppress, mcast_max_groups, mcast_n_groups, or mcast_enabled options differ. Each test verifies that VLANs with different option values appear as individual entries rather than ranges, and that VLANs with matching values are properly grouped together. Example output: $ ./bridge_vlan_dump.sh TEST: VLAN range grouping with neigh_suppress [ OK ] TEST: VLAN range grouping with mcast_max_groups [ OK ] TEST: VLAN range grouping with mcast_n_groups [ OK ] TEST: VLAN range grouping with mcast_enabled [ OK ] Signed-off-by: Danielle Ratson <danieller@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/20260225143956.3995415-3-danieller@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-26selftests/bpf: Fix OOB read in dmabuf_collectorT.J. Mercier
Dmabuf name allocations can be less than DMA_BUF_NAME_LEN characters, but bpf_probe_read_kernel always tries to read exactly that many bytes. If a name is less than DMA_BUF_NAME_LEN characters, bpf_probe_read_kernel will read past the end. bpf_probe_read_kernel_str stops at the first NUL terminator so use it instead, like iter_dmabuf_for_each already does. Fixes: ae5d2c59ecd7 ("selftests/bpf: Add test for dmabuf_iter") Reported-by: Jerome Lee <jaewookl@quicinc.com> Signed-off-by: T.J. Mercier <tjmercier@google.com> Link: https://lore.kernel.org/r/20260225003349.113746-1-tjmercier@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-26selftests/bpf: Fix a memory leak in xdp_flowtable testIhor Solodrai
test_progs run with ASAN reported [1]: ==126==ERROR: LeakSanitizer: detected memory leaks Direct leak of 32 byte(s) in 1 object(s) allocated from: #0 0x7f1ff3cfa340 in calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77 #1 0x5610c15bb520 in bpf_program_attach_fd /codebuild/output/src685977285/src/actions-runner/_work/vmtest/vmtest/src/tools/lib/bpf/libbpf.c:13164 #2 0x5610c15bb740 in bpf_program__attach_xdp /codebuild/output/src685977285/src/actions-runner/_work/vmtest/vmtest/src/tools/lib/bpf/libbpf.c:13204 #3 0x5610c14f91d3 in test_xdp_flowtable /codebuild/output/src685977285/src/actions-runner/_work/vmtest/vmtest/src/tools/testing/selftests/bpf/prog_tests/xdp_flowtable.c:138 #4 0x5610c1533566 in run_one_test /codebuild/output/src685977285/src/actions-runner/_work/vmtest/vmtest/src/tools/testing/selftests/bpf/test_progs.c:1406 #5 0x5610c1537fb0 in main /codebuild/output/src685977285/src/actions-runner/_work/vmtest/vmtest/src/tools/testing/selftests/bpf/test_progs.c:2097 #6 0x7f1ff25df1c9 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) #7 0x7f1ff25df28a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) #8 0x5610c0bd3180 in _start (/tmp/work/vmtest/vmtest/selftests/bpf/test_progs+0x593180) (BuildId: cdf9f103f42307dc0a2cd6cfc8afcbc1366cf8bd) Fix by properly destroying bpf_link on exit in xdp_flowtable test. [1] https://github.com/kernel-patches/vmtest/actions/runs/22361085418/job/64716490680 Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Reviewed-by: Subbaraya Sundeep <sbhatta@marvell.com> Link: https://lore.kernel.org/r/20260225003351.465104-1-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-26perf bench: Add -t/--threads option to perf bench mem mmapNamhyung Kim
So that it can measure overhead of mmap_lock and/or per-VMA lock contention. $ perf bench mem mmap -f demand -l 1000 -t 1 # Running 'mem/mmap' benchmark: # function 'demand' (Demand loaded mmap()) # Copying 1MB bytes ... 2.786858 GB/sec $ perf bench mem mmap -f demand -l 1000 -t 2 # Running 'mem/mmap' benchmark: # function 'demand' (Demand loaded mmap()) # Copying 1MB bytes ... 1.624468 GB/sec/thread ( +- 0.30% ) $ perf bench mem mmap -f demand -l 1000 -t 3 # Running 'mem/mmap' benchmark: # function 'demand' (Demand loaded mmap()) # Copying 1MB bytes ... 1.493068 GB/sec/thread ( +- 0.15% ) $ perf bench mem mmap -f demand -l 1000 -t 4 # Running 'mem/mmap' benchmark: # function 'demand' (Demand loaded mmap()) # Copying 1MB bytes ... 1.006087 GB/sec/thread ( +- 0.41% ) Reviewed-by: Ankur Arora <ankur.a.arora@oracle.com> Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf trace: Handle task exit in BPF syscall summaryNamhyung Kim
Some system calls never return because it'd terminate the calling thread. Let's hook the task exit path and update the duration of the last syscall. Before: $ sudo perf trace -as --bpf-summary -- true |& grep exit (nothing) After: $ sudo perf trace -as --bpf-summary -- true |& grep exit exit_group 1 0 0.004 0.004 0.004 0.004 0.00% Reviewed-by: Ian Rogers <irogers@google.com> Acked-by: Howard Chu <howardchu95@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26perf trace: Fix IS_ERR() vs NULL check bugwangguangju
The alloc_syscall_stats() function always returns an error pointer (ERR_PTR) on failure. So replace NULL check with IS_ERR() check after calling delete_syscall_stats() function. Fixes: ef2da619b132c6f74 ("perf trace: Convert syscall_stats to hashmap") Signed-off-by: wangguangju <wangguangju@hygon.cn> Reviewed-by: Howard Chu <howardchu95@gmail.com> Acked-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-7.0-rc2). Conflicts: tools/testing/selftests/drivers/net/hw/rss_ctx.py 19c3a2a81d2b ("selftests: drv-net: rss: Generate unique ports for RSS context tests") ce5a0f4612db ("selftests: drv-net: rss_ctx: test RSS contexts persist after ifdown/up") include/net/inet_connection_sock.h 858d2a4f67ff6 ("tcp: fix potential race in tcp_v6_syn_recv_sock()") fcd3d039fab69 ("tcp: make tcp_v{4,6}_send_check() static") https://lore.kernel.org/aZ8PSFLzBrEU3I89@sirena.org.uk drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c drivers/net/ethernet/mellanox/mlx5/core/en/xsk/pool.c 69050f8d6d075 ("treewide: Replace kmalloc with kmalloc_obj for non-scalar types") bf4afc53b77ae ("Convert 'alloc_obj' family to use the new default GFP_KERNEL argument") 8a96b9144f18a ("net/mlx5e: Alloc xsk channel param out of mlx5e_open_xsk()") Adjacent changes: net/netfilter/ipvs/ip_vs_ctl.c c59bd9e62e06 ("ipvs: use more counters to avoid service lookups") bf4afc53b77a ("Convert 'alloc_obj' family to use the new default GFP_KERNEL argument") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-26Merge tag 'net-7.0-rc2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Paolo Abeni: "Including fixes from IPsec, Bluetooth and netfilter Current release - regressions: - wifi: fix dev_alloc_name() return value check - rds: fix recursive lock in rds_tcp_conn_slots_available Current release - new code bugs: - vsock: lock down child_ns_mode as write-once Previous releases - regressions: - core: - do not pass flow_id to set_rps_cpu() - consume xmit errors of GSO frames - netconsole: avoid OOB reads, msg is not nul-terminated - netfilter: h323: fix OOB read in decode_choice() - tcp: re-enable acceptance of FIN packets when RWIN is 0 - udplite: fix null-ptr-deref in __udp_enqueue_schedule_skb(). - wifi: brcmfmac: fix potential kernel oops when probe fails - phy: register phy led_triggers during probe to avoid AB-BA deadlock - eth: - bnxt_en: fix deleting of Ntuple filters - wan: farsync: fix use-after-free bugs caused by unfinished tasklets - xscale: check for PTP support properly Previous releases - always broken: - tcp: fix potential race in tcp_v6_syn_recv_sock() - kcm: fix zero-frag skb in frag_list on partial sendmsg error - xfrm: - fix race condition in espintcp_close() - always flush state and policy upon NETDEV_UNREGISTER event - bluetooth: - purge error queues in socket destructors - fix response to L2CAP_ECRED_CONN_REQ - eth: - mlx5: - fix circular locking dependency in dump - fix "scheduling while atomic" in IPsec MAC address query - gve: fix incorrect buffer cleanup for QPL - team: avoid NETDEV_CHANGEMTU event when unregistering slave - usb: validate USB endpoints" * tag 'net-7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (72 commits) netfilter: nf_conntrack_h323: fix OOB read in decode_choice() dpaa2-switch: validate num_ifs to prevent out-of-bounds write net: consume xmit errors of GSO frames vsock: document write-once behavior of the child_ns_mode sysctl vsock: lock down child_ns_mode as write-once selftests/vsock: change tests to respect write-once child ns mode net/mlx5e: Fix "scheduling while atomic" in IPsec MAC address query net/mlx5: Fix missing devlink lock in SRIOV enable error path net/mlx5: E-switch, Clear legacy flag when moving to switchdev net/mlx5: LAG, disable MPESW in lag_disable_change() net/mlx5: DR, Fix circular locking dependency in dump selftests: team: Add a reference count leak test team: avoid NETDEV_CHANGEMTU event when unregistering slave net: mana: Fix double destroy_workqueue on service rescan PCI path MAINTAINERS: Update maintainer entry for QUALCOMM ETHQOS ETHERNET DRIVER dpll: zl3073x: Remove redundant cleanup in devm_dpll_init() selftests/net: packetdrill: Verify acceptance of FIN packets when RWIN is 0 tcp: re-enable acceptance of FIN packets when RWIN is 0 vsock: Use container_of() to get net namespace in sysctl handlers net: usb: kaweth: validate USB endpoints ...
2026-02-26selftests/vsock: change tests to respect write-once child ns modeBobby Eshleman
The child_ns_mode sysctl parameter becomes write-once in a future patch in this series, which breaks existing tests. This patch updates the tests to respect this new policy. No additional tests are added. Add "global-parent" and "local-parent" namespaces as intermediaries to spawn namespaces in the given modes. This avoids the need to change "child_ns_mode" in the init_ns. nsenter must be used because ip netns unshares the mount namespace so nested "ip netns add" breaks exec calls from the init ns. Adds nsenter to the deps check. Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com> Link: https://patch.msgid.link/20260223-vsock-ns-write-once-v3-1-c0cde6959923@meta.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-02-25selftests: drv-net: rss: Generate unique ports for RSS context testsDimitri Daskalakis
The RSS ctx tests rely on NFC rules with unique ports to steer packets to the correct ctx. This updates the test to use the new rand_ports() helper to guarantee the ports are unique. Manual testing shows that generating 32 ports with the existing method would result in at least one duplicate 4% of the time. Signed-off-by: Dimitri Daskalakis <dimitri.daskalakis1@gmail.com> Link: https://patch.msgid.link/20260224224659.1507082-3-dimitri.daskalakis1@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-25selftests: net: py: Add rand_ports helper methodDimitri Daskalakis
Certain tests need a unique set of ports. Successive calls to the existing rand_port method may return a duplicate port, resulting in test flakiness. The new helper keeps sockets open while building a list of ephemeral ports, thus the kernel enforces their uniqueness. Signed-off-by: Dimitri Daskalakis <dimitri.daskalakis1@gmail.com> Link: https://patch.msgid.link/20260224224659.1507082-2-dimitri.daskalakis1@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-25selftests: team: Add a reference count leak testIdo Schimmel
Add a test for the issue that was fixed in "team: avoid NETDEV_CHANGEMTU event when unregistering slave". The test hangs due to a reference count leak without the fix: # make -C tools/testing/selftests TARGETS="drivers/net/team" TEST_PROGS=refleak.sh TEST_GEN_PROGS="" run_tests [...] TAP version 13 1..1 # timeout set to 45 # selftests: drivers/net/team: refleak.sh [ 50.681299][ T496] unregister_netdevice: waiting for dummy1 to become free. Usage count = 3 [ 71.185325][ T496] unregister_netdevice: waiting for dummy1 to become free. Usage count = 3 And passes with the fix: # make -C tools/testing/selftests TARGETS="drivers/net/team" TEST_PROGS=refleak.sh TEST_GEN_PROGS="" run_tests [...] TAP version 13 1..1 # timeout set to 45 # selftests: drivers/net/team: refleak.sh ok 1 selftests: drivers/net/team: refleak.sh Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Acked-by: Stanislav Fomichev <sdf@fomichev.me> Link: https://patch.msgid.link/20260224125709.317574-3-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-25selftests/net: packetdrill: Verify acceptance of FIN packets when RWIN is 0Simon Baatz
Add a packetdrill test that verifies we accept bare FIN packets when the advertised receive window is zero. Signed-off-by: Simon Baatz <gmbnomis@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Link: https://patch.msgid.link/20260224-fix_zero_wnd_fin-v2-2-a16677ea7cea@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-25selftests: hw-net: tso: set a TCP window clamp to avoid spurious dropsJakub Kicinski
The TSO test wants to make sure that there isn't a lot of retransmits, because that could indicate that device has a buggy TSO implementation. On debug kernels, however, we're likely to see significant packet loss because we simply overwhelm the receiver. In a QEMU loop with virtio devices we see ~10% false positive rate with occasional run hitting the threshold of 25% packet loss. Since we're only sending 4MB of data, set a TCP_WINDOW_CLAMP to 200k. This seems to make virtio happy while having little impact since we're primarily interested in testing the sender, and the test doesn't currently enable BIG TCP. Running socat over virtio loop for 2 sec on a debug kernel shows: TcpOutSegs 27327 0.0 TcpRetransSegs 83 0.0 TcpOutSegs 30012 0.0 TcpRetransSegs 80 0.0 TcpOutSegs 28767 0.0 TcpRetransSegs 77 0.0 But with the clamp the 3 attempts show no retransmit: TcpOutSegs 31537 0.0 TcpRetransSegs 0 0.0 TcpOutSegs 30323 0.0 TcpRetransSegs 0 0.0 TcpOutSegs 28700 0.0 TcpRetransSegs 0 0.0 Since we expect no receiver-related drops now we can significantly increase test's sensitivity to drops. All the testing we do in NIPA uses cubic. Link: https://patch.msgid.link/20260223204030.4142884-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-25perf script: Fix brcntr output with --xedAndi Kleen
brcntr in perf script brstack insn currently outputs $ perf record -j any,counter ... $ perf script -F +brcntr,+brstackinsn ... BC1s 3450809 5665912.127194: 100127 cpu_core/cycles/: 7f0475d6cc89 handle_intel.constprop.0+0x2b (/usr/lib64/ld-linux- x86-64.so.2) intel_check_word.constprop.0+224: 00007f0475d6ca7e insn: 00 4b db br_cntr: # PRED 21 cycles [21] ... This has two issues: - The description says no event is a single dash, but that is not what is printed. - The b in brcntr is ambigious with the hex numbers in insns, which breaks with --xed. It parses the b as another instruction byte and merges the instruction with a missing b and no space: $ perf script -F +brstackinsn,+brcntr --xed ... 00005618c6d683b5 jnz 0x5618c6d683bdr_cntr: # PRED 5 cycles [1396] 8.60 IPC This patches fixes these two problems. It moves the brcntr output into the "#" comment which also looks nicer and also fixes the no event case. $ perf script -F +brstackinsn,+brcntr --xed ... 00005618c6d6624f jnz 0x5618c6d65fb7 # br_cntr: - MISPRED 1 cycles [1398] 3.00 IPC Since the old broken format has shipped for a few releases there is a risk of breaking some existing parser, but since this is a obscure feature I hope they're not too common and can adapt. Signed-off-by: Andi Kleen <andi@firstfloor.org> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-25kselftest: arm64: Check access to GCS after mprotect(PROT_NONE)Catalin Marinas
A GCS mapping should not be accessible after mprotect(PROT_NONE). Add a kselftest for this scenario. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Mark Brown <broonie@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: David Hildenbrand <david@kernel.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Will Deacon <will@kernel.org>
2026-02-25tools/nolibc: rename my_syscallX() to __nolibc_syscallX()Thomas Weißschuh
The naming convention of the my_syscallX() macros is a bit unfortunate. They may conflict with application code and the name is very generic. Switch to __nolibc_syscallX(). The leading underscores place the symbols in the implementation-defined namespace, avoiding conflicting names. It is also clearer that these are non-standard extensions from nolibc. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260223-nolibc-namespacing-v1-1-52574ffebb2c@weissschuh.net
2026-02-24selftests: net: py: add cmd info for ksft_wait failureJakub Kicinski
Gal recently complained: When [ksft_wait failure] happens, the test fails with a cryptic message: # Exception| Exception: Did not receive ready message Let's try to include the stdout/stderr of the command we tried to start. E.g. for cmd("false", ksft_wait=True): # Exception| lib.py.utils.CmdInitFailure: Did not receive ready message # Exception| CMD: false # Exception| EXIT: 1 We need to factor out _process_terminate() otherwise the exit path may try to write to already disconnected self.ksft_term_fd. Reviewed-by: Petr Machata <petrm@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260223202633.4126087-4-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-24selftests: net: py: use repr(cmd) for failure exceptionsJakub Kicinski
Reuse repr(cmd) instead of manually formatting a similar string. Before: # Exception| lib.py.utils.CmdExitFailure: Command failed: false # Exception| STDOUT: b'' # Exception| STDERR: b'' After: # Exception| lib.py.utils.CmdExitFailure: Command failed # Exception| CMD: false # Exception| EXIT: 1 Reviewed-by: Petr Machata <petrm@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260223202633.4126087-3-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-24selftests: net: py: avoid masking exceptions in bkg() failuresJakub Kicinski
bkg() failures are currently quite hard to debug and spot. Often we have code along the lines of: with bkg("./cmd_rx_something -p PORT"): wait_port_listen(PORT) cmd("./cmd_tx_something", host=remote) When wait_port_listen() fails we don't get to see the exit status of bkg(). Even tho very often it's a failure in the bkg() command that's actually to blame. Try not to interfere with the bkg() command error checking. With: with bkg("false", exit_wait=True): time.sleep(0.01) # let the 'false' cmd run raise Exception("bla") Before: .. stack trace .. # Exception| Exception: bla After: .. stack trace .. # Exception| Exception: bla # Exception| # Exception| During handling of the above exception, another exception occurred: .. stack trace .. # Exception| lib.py.utils.CmdExitFailure: Command failed: false # Exception| STDOUT: b'' # Exception| STDERR: b'' Reviewed-by: Petr Machata <petrm@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260223202633.4126087-2-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-24selftests/bpf: Test accounting of tail calls when prog is NULLHari Bathini
Test whether tail call count is incorrectly accounted for, when the tail call fails due to a missing BPF program. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Link: https://lore.kernel.org/r/20260216090802.1805655-1-hbathini@linux.ibm.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix flakiness of task_local_storage/sys_enter_exitIhor Solodrai
The test_sys_enter_exit test was setting target_pid before attaching the BPF programs, which causes syscalls made during the attach phase to be counted. This is flaky because, apparently, there is no guarantee that both on_enter and on_exit will trigger during the attachment. Move the target_pid assignment to after task_local_storage__attach() so that only explicit sys_gettid() calls are counted. Reported-by: BPF CI Bot (Claude Opus 4.6) <bot+bpf-ci@kernel.org> Closes: https://github.com/kernel-patches/vmtest/issues/448 Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com> Link: https://lore.kernel.org/r/20260224211202.214325-1-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24perf metricgroup: Fix metricgroup__has_metric_or_groupsIan Rogers
Use metricgroup__for_each_metric rather than pmu_metrics_table__for_each_metric that combines the default metric table with, a potentially empty, CPUID table. Fixes: cee275edcdb1 ("perf metricgroup: Don't early exit if no CPUID table exists") Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Leo Yan <leo.yan@arm.com> Tested-by: Leo Yan <leo.yan@arm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-24perf parse-events: Fix big-endian 'overwrite' by writing correct union memberThomas Richter
The "Read backward ring buffer" test crashes on big-endian (e.g. s390x) due to a NULL dereference when the backward mmap path isn't enabled. Reproducer: # ./perf test -F 'Read backward ring buffer' Segmentation fault (core dumped) # uname -m s390x # Root cause: get_config_terms() stores into evsel_config_term::val.val (u64) while later code reads boolean fields such as evsel_config_term::val.overwrite. On big-endian the 1-byte boolean is left-aligned, so writing evsel_config_term::val.val = 1 is read back as evsel_config_term::val.overwrite = 0, leaving backward mmap disabled and a NULL map being used. Store values in the union member that matches the term type, e.g.: /* for OVERWRITE */ new_term->val.overwrite = 1; /* not new_term->val.val = 1 */ to fix this. Improve add_config_term() and add two more parameters for string and value. Function add_config_term() now creates a complete node element of type evsel_config_term and handles all evsel_config_term::val union members. Impact: Enables backward mmap on big-endian and prevents the crash. No change on little-endian. Output after: # ./perf test -Fv 44 --- start --- Using CPUID IBM,9175,705,ME1,3.8,002f mmap size 1052672B mmap size 8192B ---- end ---- 44: Read backward ring buffer : Ok # Fixes: 159ca97cd97c ("perf parse-events: Refactor get_config_terms() to remove macros") Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Jan Polensky <japo@linux.ibm.com> Reviewed-by: James Clark <james.clark@linaro.org> Acked-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-02-24tools/sched_ext: Add Kconfig to sync with upstreamCheng-Yang Chou
Add the missing Kconfig file to tools/sched_ext/ as referenced in the README. Ref: https://github.com/sched-ext/scx/blob/main/kernel.config Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-02-24tools/sched_ext: Sync README.md Kconfig with upstream scxCheng-Yang Chou
Sync the documentation with the upstream scx repository to reflect the current recommended configuration. Ref: https://github.com/sched-ext/scx/blob/main/README.md#build--install Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-02-24selftests/bpf: Don't override SIGSEGV handler with ASANIhor Solodrai
test_progs has custom SIGSEGV handler, which interferes with the address sanitizer [1]. Add an #ifndef to avoid this. Additionally, declare an __asan_on_error() to dump the test logs in the same way it happens in the custom SIGSEGV handler. [1] https://lore.kernel.org/bpf/73d832948b01dbc0ebc60d85574bdf8537f3a810.camel@gmail.com/ Acked-by: Mykyta Yatsenko <yatsenko@meta.com> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223191118.655185-3-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Check BPFTOOL env var in detect_bpftool_path()Ihor Solodrai
The bpftool_maps_access and bpftool_metadata tests may fail on BPF CI with "command not found", depending on a workflow. This happens because detect_bpftool_path() only checks two hardcoded relative paths: - ./tools/sbin/bpftool - ../tools/sbin/bpftool Add support for a BPFTOOL environment variable that allows specifying the exact path to the bpftool binary. Acked-by: Mykyta Yatsenko <yatsenko@meta.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223191118.655185-2-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix out-of-bounds array access bugs reported by ASANIhor Solodrai
- kmem_cache_iter: remove unnecessary debug output - lwt_seg6local: change the type of foobar to char[] - the sizeof(foobar) returned the pointer size and not a string length as intended - verifier_log: increase prog_name buffer size in verif_log_subtest() - compiler has a conservative estimate of fixed_log_sz value, making ASAN complain on snprint() call Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223191118.655185-1-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix array bounds warning in jit_disasm_helpersIhor Solodrai
Compiler cannot infer upper bound for labels.cnt and warns about potential buffer overflow in snprintf. Add an explicit bounds check (... && i < MAX_LOCAL_LABELS) in the loop condition to fix the warning. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-18-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Free bpf_object in test_sysctlIhor Solodrai
ASAN reported a resource leak due to the bpf_object not being tracked in test_sysctl. Add obj field to struct sysctl_test to properly clean it up. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-17-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix resource leaks caused by missing cleanupsIhor Solodrai
ASAN reported a number of resource leaks: - Add missing *__destroy(skel) calls - Replace bpf_link__detach() with bpf_link__destroy() where appropriate - cgrp_local_storage: Add bpf_link__destroy() when bpf_iter_create fails - dynptr: Add missing bpf_object__close() Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-16-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix double thread join in uprobe_multi_testIhor Solodrai
ASAN reported a "joining already joined thread" error. The release_child() may be called multiple times for the same struct child. Fix by resetting child->thread to 0 after pthread_join. Also memset(0) static child variable in test_attach_api(). Acked-by: Mykyta Yatsenko <yatsenko@meta.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-15-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix use-after-free in xdp_metadata testIhor Solodrai
ASAN reported a use-after-free in close_xsk(). The xsk->socket internally references xsk->umem via socket->ctx->umem, so the socket must be deleted before the umem. Fix the order of operations in close_xsk(). Acked-by: Mykyta Yatsenko <yatsenko@meta.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-14-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24veristat: Fix a memory leak for preset ENUMERATORIhor Solodrai
ASAN detected a memory leak in veristat. The cleanup code handling ENUMERATOR value missed freeing strdup-ed svalue. Fix it. Acked-by: Mykyta Yatsenko <yatsenko@meta.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-13-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix cleanup in check_fd_array_cnt__fd_array_too_big()Ihor Solodrai
The Close() macro uses the passed in expression three times, which leads to repeated execution in case it has side effects. That is, Close(i--) would decrement i three times. ASAN caught a stack-buffer-undeflow error at a point where this was overlooked. Fix it. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-12-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Fix memory leaks in testsIhor Solodrai
Fix trivial memory leaks detected by userspace ASAN: - htab_update: free value buffer in test_reenter_update cleanup - test_xsk: inline pkt_stream_replace() in testapp_stats_rx_full() and testapp_stats_fill_empty() - testing_helpers: free buffer allocated by getline() in parse_test_list_file Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-11-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Refactor bpf_get_ksyms() trace helperIhor Solodrai
ASAN reported a memory leak in bpf_get_ksyms(): it allocates a struct ksyms internally and never frees it. Move struct ksyms to trace_helpers.h and return it from the bpf_get_ksyms(), giving ownership to the caller. Add filtered_syms and filtered_cnt fields to the ksyms to hold the filtered array of symbols, previously returned by bpf_get_ksyms(). Fixup the call sites: kprobe_multi_test and bench_trigger. Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260223190736.649171-10-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Add DENYLIST.asanIhor Solodrai
Add a denylist file for tests that should be skipped when built with userspace ASAN: $ make ... SAN_CFLAGS="-fsanitize=address -fno-omit-frame-pointer" Skip the following tests: - *arena*: userspace ASAN does not understand BPF arena maps and gets confused particularly when map_extra is non-zero - non-zero map_extra leads to mmap with MAP_FIXED, and ASAN treats this as an unknown memory region - task_local_data: ASAN complains about "incorrect" aligned_alloc() usage, but it's intentional in the test - uprobe_multi_test: very slow with ASAN enabled Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-9-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24resolve_btfids: Fix memory leaks reported by ASANIhor Solodrai
Running resolve_btfids with ASAN reveals memory leaks in btf_id handling. - Change get_id() to use a local buffer - Make btf_id__add() strdup the name internally - Add btf_id__free_all() that frees all nodese of a tree - Call the cleanup function on exit for every tree Acked-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-8-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Pass through build flags to bpftool and resolve_btfidsIhor Solodrai
EXTRA_* and SAN_* build flags were not correctly propagated to bpftool and resolve_btids when building selftests/bpf. This led to various build errors on attempt to build with SAN_CFLAGS="-fsanitize=address", for example. Fix the makefiles to address this: - Pass SAN_CFLAGS/SAN_LDFLAGS to bpftool and resolve_btfids build - Propagate EXTRA_LDFLAGS to resolve_btfids link command - Use pkg-config to detect zlib and zstd for resolve_btfids, similar libelf handling Also check for ASAN flag in selftests/bpf/Makefile for convenience. Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-7-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Use memcpy() for bounded non-NULL-terminated copiesIhor Solodrai
Replace strncpy() with memcpy() in cases where the source is non-NULL-terminated and the copy length is known. Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-6-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Use strscpy in bpftool_helpers.cIhor Solodrai
Replace strncpy() calls in bpftool_helpers.c with strscpy(). Pass the destination buffer size to detect_bpftool_path() instead of hardcoding BPFTOOL_PATH_MAX_LEN. Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-5-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-24selftests/bpf: Replace strncpy() with strscpy()Ihor Solodrai
strncpy() does not guarantee NULL-termination and is considered deprecated [1]. Replace strncpy() calls with strscpy(). [1] https://docs.kernel.org/process/deprecated.html#strncpy-on-nul-terminated-strings Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260223190736.649171-4-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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