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[PATCH 0/1] selftests: net: use BASH for bareudp testing

by Po-Hsu Lin

The bareudp.sh script uses /bin/sh and it will load another lib.sh BASH script at the very beginning. But on some operating systems like Ubuntu, /bin/sh is actually pointed to DASH, thus it will try to run BASH commands with DASH and consequently leads to syntax issues. This patch fixes syntax failures on systems where /bin/sh is not BASH by explicitily using BASH for bareudp.sh. Po-Hsu Lin (1): selftests: net: use BASH for bareudp testing tools/testing/selftests/net/bareudp.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.34.1

1 month

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[PATCH v2] selftest: net: fix socklen_t type mismatch in sctp_collision test

by Ankit Khushwaha

Socket APIs like recvfrom(), accept(), and getsockname() expect socklen_t* arg, but tests were using int variables. This causes -Wpointer-sign warnings on platforms where socklen_t is unsigned. Change the variable type from int to socklen_t to resolve the warning and ensure type safety across platforms. warning fixed: sctp_collision.c:62:70: warning: passing 'int *' to parameter of type 'socklen_t *' (aka 'unsigned int *') converts between pointers to integer types with different sign [-Wpointer-sign] 62 | ret = recvfrom(sd, buf, sizeof(buf), 0, (struct sockaddr *)&daddr, &len); | ^~~~ /usr/include/sys/socket.h:165:27: note: passing argument to parameter '__addr_len' here 165 | socklen_t *__restrict __addr_len); | ^ Reviewed-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> Signed-off-by: Ankit Khushwaha <ankitkhushwaha.linux(a)gmail.com> --- tools/testing/selftests/net/netfilter/sctp_collision.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/netfilter/sctp_collision.c b/tools/testing/selftests/net/netfilter/sctp_collision.c index 21bb1cfd8a85..91df996367e9 100644 --- a/tools/testing/selftests/net/netfilter/sctp_collision.c +++ b/tools/testing/selftests/net/netfilter/sctp_collision.c @@ -9,7 +9,8 @@ int main(int argc, char *argv[]) { struct sockaddr_in saddr = {}, daddr = {}; - int sd, ret, len = sizeof(daddr); + socklen_t len = sizeof(daddr); struct timeval tv = {25, 0}; char buf[] = "hello"; + int sd, ret; -- 2.51.0

1 month

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[PATCH v3 0/3] KHO: kfence + KHO memory corruption fix

by Pasha Tatashin

This series fixes a memory corruption bug in KHO that occurs when KFENCE is enabled. The root cause is that KHO metadata, allocated via kzalloc(), can be randomly serviced by kfence_alloc(). When a kernel boots via KHO, the early memblock allocator is restricted to a "scratch area". This forces the KFENCE pool to be allocated within this scratch area, creating a conflict. If KHO metadata is subsequently placed in this pool, it gets corrupted during the next kexec operation. Patch 1/3 introduces a debug-only feature (CONFIG_KEXEC_HANDOVER_DEBUG) that adds checks to detect and fail any operation that attempts to place KHO metadata or preserved memory within the scratch area. This serves as a validation and diagnostic tool to confirm the problem without affecting production builds. Patch 2/3 Increases bitmap to PAGE_SIZE, so buddy allocator can be used. Patch 3/3 Provides the fix by modifying KHO to allocate its metadata directly from the buddy allocator instead of slab. This bypasses the KFENCE interception entirely. Pasha Tatashin (3): liveupdate: kho: warn and fail on metadata or preserved memory in scratch area liveupdate: kho: Increase metadata bitmap size to PAGE_SIZE liveupdate: kho: allocate metadata directly from the buddy allocator include/linux/gfp.h | 3 ++ kernel/Kconfig.kexec | 9 ++++ kernel/Makefile | 1 + kernel/kexec_handover.c | 72 ++++++++++++++++++++------------ kernel/kexec_handover_debug.c | 25 +++++++++++ kernel/kexec_handover_internal.h | 16 +++++++ 6 files changed, 100 insertions(+), 26 deletions(-) create mode 100644 kernel/kexec_handover_debug.c create mode 100644 kernel/kexec_handover_internal.h base-commit: 6548d364a3e850326831799d7e3ea2d7bb97ba08 -- 2.51.0.869.ge66316f041-goog

1 month

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[RFC bpf-next 0/2] Print map ID on successful creation

by Harshit Mogalapalli

Hi all, I have tried looking at an issue from the bpftool repository: https://github.com/libbpf/bpftool/issues/121 and this RFC tries to add that enhancement. Summary: Currently when a map creation is successful there is no message on the terminal, printing IDs on successful creation of maps can help notify the user and can be used in CI/CD. The first patch adds the logic for printing and the second patch adds a simple selftest for the same. The github issue is not fully solved with these two patches, as there are other bpf objects that might need similar additions. Would appreciate any inputs on this. Thank you very much. Regards, Harshit Harshit Mogalapalli (2): bpftool: Print map ID upon creation and support JSON output selftests/bpf: Add test for bpftool map ID printing tools/bpf/bpftool/map.c | 24 +++++++++++--- .../testing/selftests/bpf/test_bpftool_map.sh | 32 +++++++++++++++++++ 2 files changed, 52 insertions(+), 4 deletions(-) -- 2.50.1

1 month

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[PATCH] selftests/seccomp: Fixed type mismatch warning

by Alessandro Zanni

Forced cast of the variable passed to the get_uprobe_offset() function either probed_uretprobe or probed_uprobe. The solved warning is as follows: CC seccomp_bpf seccomp_bpf.c: In function ‘UPROBE_setup’: seccomp_bpf.c:5175:74: warning: pointer type mismatch in conditional expression 5175 | offset = get_uprobe_offset(variant->uretprobe ? probed_uretprobe : probed_uprobe); | Command to test it: make -C tools/testing/selftests TARGETS=seccomp Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- tools/testing/selftests/seccomp/seccomp_bpf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index 874f17763536..cd745a8a5b7e 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -5172,7 +5172,8 @@ FIXTURE_SETUP(UPROBE) ASSERT_GE(bit, 0); } - offset = get_uprobe_offset(variant->uretprobe ? probed_uretprobe : probed_uprobe); + offset = get_uprobe_offset(variant->uretprobe + ? (void *)probed_uretprobe : (void *)probed_uprobe); ASSERT_GE(offset, 0); if (variant->uretprobe) -- 2.43.0

1 month

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[PATCH net] selftests: netdevsim: Fix ethtool-coalesce.sh fail by installing ethtool-common.sh

by Wang Liang

The script "ethtool-common.sh" is not installed in INSTALL_PATH, and triggers some errors when I try to run the test 'drivers/net/netdevsim/ethtool-coalesce.sh': TAP version 13 1..1 # timeout set to 600 # selftests: drivers/net/netdevsim: ethtool-coalesce.sh # ./ethtool-coalesce.sh: line 4: ethtool-common.sh: No such file or directory # ./ethtool-coalesce.sh: line 25: make_netdev: command not found # ethtool: bad command line argument(s) # ./ethtool-coalesce.sh: line 124: check: command not found # ./ethtool-coalesce.sh: line 126: [: -eq: unary operator expected # FAILED /0 checks not ok 1 selftests: drivers/net/netdevsim: ethtool-coalesce.sh # exit=1 Install this file to avoid this error. After this patch: TAP version 13 1..1 # timeout set to 600 # selftests: drivers/net/netdevsim: ethtool-coalesce.sh # PASSED all 22 checks ok 1 selftests: drivers/net/netdevsim: ethtool-coalesce.sh Fixes: fbb8531e58bd ("selftests: extract common functions in ethtool-common.sh") Signed-off-by: Wang Liang <wangliang74(a)huawei.com> --- tools/testing/selftests/drivers/net/netdevsim/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/drivers/net/netdevsim/Makefile b/tools/testing/selftests/drivers/net/netdevsim/Makefile index daf51113c827..653141a654a0 100644 --- a/tools/testing/selftests/drivers/net/netdevsim/Makefile +++ b/tools/testing/selftests/drivers/net/netdevsim/Makefile @@ -20,4 +20,6 @@ TEST_PROGS := \ udp_tunnel_nic.sh \ # end of TEST_PROGS +TEST_FILES := ethtool-common.sh + include ../../../lib.mk -- 2.34.1

1 month

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[PATCH net-next 00/12] selftests/vsock: refactor and improve vmtest infrastructure

by Bobby Eshleman

Hey all, This patch series refactors the vsock selftest VM infrastructure to improve test run times, reduce false-positives, improve logging generally, and fix several bugs. It also prepares for future tests which make heavy usage of these refactored functions and have new requirements such as simultaneous QEMU processes. These patches were broken off from this prior series: https://lore.kernel.org/all/20251021-vsock-vmtest-v7-0-0661b7b6f081@meta.co… To: Stefano Garzarella <sgarzare(a)redhat.com> To: Shuah Khan <shuah(a)kernel.org> To: Jakub Kicinski <kuba(a)kernel.org> To: Bobby Eshleman <bobbyeshleman(a)gmail.com> Cc: virtualization(a)lists.linux.dev Cc: netdev(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Signed-off-by: Bobby Eshleman <bobbyeshleman(a)meta.com> --- Bobby Eshleman (12): selftests/vsock: improve logging in vmtest.sh selftests/vsock: make wait_for_listener() work even if pipefail is on selftests/vsock: reuse logic for vsock_test through wrapper functions selftests/vsock: avoid multi-VM pidfile collisions with QEMU selftests/vsock: do not unconditionally die if qemu fails selftests/vsock: speed up tests by reducing the QEMU pidfile timeout selftests/vsock: add check_result() for pass/fail counting selftests/vsock: identify and execute tests that can re-use VM selftests/vsock: add BUILD=0 definition selftests/vsock: avoid false-positives when checking dmesg selftests/vsock: add 1.37 to tested virtme-ng versions selftests/vsock: add vsock_loopback module loading tools/testing/selftests/vsock/vmtest.sh | 345 +++++++++++++++++++++----------- 1 file changed, 227 insertions(+), 118 deletions(-) --- base-commit: 962ac5ca99a5c3e7469215bf47572440402dfd59 change-id: 20251021-vsock-selftests-fixes-and-improvements-057440ffb2fa Best regards, -- Bobby Eshleman <bobbyeshleman(a)meta.com>

1 month

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[PATCH v3 00/12] Start porting UML to nolibc

by Benjamin Berg

From: Benjamin Berg <benjamin.berg(a)intel.com> This patchset is an attempt to start a nolibc port of UML. The goal is to port UML to use nolibc in smaller chunks to make the switch more manageable. Using nolibc has the advantage that it is a smaller runtime and it allows us to be in full control about all memory mappings that are done. Another libc on the other hand might map memory unaware of UML, causing collisions with the UML memory layout. Such mappings could even happen before UML has fully initialized (e.g. rseq being mapped into the physical or vmalloc memory areas). There are three parts to this patchset: * Two patches to use tools/include headers instead of kernel headers for userspace files. * A few nolibc fixes and a new NOLIBC_NO_RUNTIME compile flag for it * Finally nolibc build support for UML and switching two files while adding the appropriate support in nolibc itself. v1 of this patchset was https://lore.kernel.org/all/20250915071115.1429196-1-benjamin@sipsolutions.… v2: https://lore.kernel.org/all/20250919153420.727385-1-benjamin@sipsolutions.n… Changes in v3: - sys_ptrace is now not a varadic function - improve printf %m implementation - keep perror as function available with NOLIBC_IGNORE_ERRNO - change syscall guard and fix i386 build Changes in v2: - add sys/uio.h and sys/ptrace.h to nolibc - Use NOLIBC_NO_RUNTIME to disable nolibc startup code - Fix out-of-tree build - various small improvements and cleanups Benjamin Benjamin Berg (12): tools compiler.h: fix __used definition um: use tools/include for user files tools/nolibc/stdio: let perror work when NOLIBC_IGNORE_ERRNO is set tools/nolibc/dirent: avoid errno in readdir_r tools/nolibc: implement %m if errno is not defined tools/nolibc: use __fallthrough__ rather than fallthrough tools/nolibc: add option to disable runtime um: add infrastructure to build files using nolibc um: use nolibc for the --showconfig implementation tools/nolibc: add uio.h with readv and writev tools/nolibc: add ptrace support um: switch ptrace FP register access to nolibc arch/um/Makefile | 38 ++++++++++++--- arch/um/include/shared/init.h | 2 +- arch/um/include/shared/os.h | 2 + arch/um/include/shared/user.h | 6 --- arch/um/kernel/Makefile | 2 +- arch/um/kernel/skas/stub.c | 1 + arch/um/kernel/skas/stub_exe.c | 4 +- arch/um/os-Linux/skas/process.c | 6 +-- arch/um/os-Linux/start_up.c | 4 +- arch/um/scripts/Makefile.rules | 10 +++- arch/x86/um/Makefile | 6 ++- arch/x86/um/os-Linux/Makefile | 5 +- arch/x86/um/os-Linux/registers.c | 20 ++------ arch/x86/um/user-offsets.c | 1 - tools/include/linux/compiler.h | 2 +- tools/include/nolibc/Makefile | 2 + tools/include/nolibc/arch-arm.h | 2 + tools/include/nolibc/arch-arm64.h | 2 + tools/include/nolibc/arch-loongarch.h | 2 + tools/include/nolibc/arch-m68k.h | 2 + tools/include/nolibc/arch-mips.h | 2 + tools/include/nolibc/arch-powerpc.h | 2 + tools/include/nolibc/arch-riscv.h | 2 + tools/include/nolibc/arch-s390.h | 2 + tools/include/nolibc/arch-sh.h | 2 + tools/include/nolibc/arch-sparc.h | 2 + tools/include/nolibc/arch-x86.h | 4 ++ tools/include/nolibc/compiler.h | 4 +- tools/include/nolibc/crt.h | 3 ++ tools/include/nolibc/dirent.h | 6 +-- tools/include/nolibc/nolibc.h | 2 + tools/include/nolibc/stackprotector.h | 2 + tools/include/nolibc/stdio.h | 10 +++- tools/include/nolibc/stdlib.h | 2 + tools/include/nolibc/sys.h | 3 +- tools/include/nolibc/sys/auxv.h | 3 ++ tools/include/nolibc/sys/ptrace.h | 44 ++++++++++++++++++ tools/include/nolibc/sys/uio.h | 49 ++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 11 +++++ 39 files changed, 221 insertions(+), 53 deletions(-) create mode 100644 tools/include/nolibc/sys/ptrace.h create mode 100644 tools/include/nolibc/sys/uio.h -- 2.51.0

1 month

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[PATCH] MAINTAINERS: Update KUnit email address for Rae Moar

by Rae Moar

Update Rae's email address for the KUnit entry. Also add an entry to .mailmap to map former google email to current gmail address. Signed-off-by: Rae Moar <rmoar(a)google.com> --- I am leaving Google and am going through and cleaning up my @google.com address in the relevant places. Note that Friday, November 7 2025 is my last day at Google after which I will lose access to this email account so any future updates or comments after Friday will come from my @gmail.com account. .mailmap | 1 + MAINTAINERS | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/.mailmap b/.mailmap index d2edd256b19d..2fcf7e4a5cfd 100644 --- a/.mailmap +++ b/.mailmap @@ -642,6 +642,7 @@ Qais Yousef <qyousef(a)layalina.io> <qais.yousef(a)arm.com> Quentin Monnet <qmo(a)kernel.org> <quentin.monnet(a)netronome.com> Quentin Monnet <qmo(a)kernel.org> <quentin(a)isovalent.com> Quentin Perret <qperret(a)qperret.net> <quentin.perret(a)arm.com> +Rae Moar <raemoar63(a)gmail.com> <rmoar(a)google.com> Rafael J. Wysocki <rjw(a)rjwysocki.net> <rjw(a)sisk.pl> Rajeev Nandan <quic_rajeevny(a)quicinc.com> <rajeevny(a)codeaurora.org> Rajendra Nayak <quic_rjendra(a)quicinc.com> <rnayak(a)codeaurora.org> diff --git a/MAINTAINERS b/MAINTAINERS index 46126ce2f968..eefcff990987 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13601,7 +13601,7 @@ F: fs/smb/server/ KERNEL UNIT TESTING FRAMEWORK (KUnit) M: Brendan Higgins <brendan.higgins(a)linux.dev> M: David Gow <davidgow(a)google.com> -R: Rae Moar <rmoar(a)google.com> +R: Rae Moar <raemoar63(a)gmail.com> L: linux-kselftest(a)vger.kernel.org L: kunit-dev(a)googlegroups.com S: Maintained base-commit: 9de5f847ef8fa205f4fd704a381d32ecb5b66da9 -- 2.51.1.851.g4ebd6896fd-goog

1 month

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[PATCH v5 net-next 00/14] AccECN protocol case handling series

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Plesae find the v5 AccECN case handling patch series, which covers several excpetional case handling of Accurate ECN spec (RFC9768), adds new identifiers to be used by CC modules, adds ecn_delta into rate_sample, and keeps the ACE counter for computation, etc. This patch series is part of the full AccECN patch series, which is available at https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/ Best regards, Chia-Yu --- v5: - Move previous #11 in v4 in latter patch after discussion with RFC author. - Add #3 to update the comments for SKB_GSO_TCP_ECN and SKB_GSO_TCP_ACCECN. (Parav Pandit <parav(a)nvidia.com>) - Add gro self-test for TCP CWR flag in #4. (Eric Dumazet <edumazet(a)google.com>) - Add fixes: tag into #7 (Paolo Abeni <pabeni(a)redhat.com>) - Update commit message of #8 and if condition check (Paolo Abeni <pabeni(a)redhat.com>) - Add empty line between variable declarations and code in #13 (Paolo Abeni <pabeni(a)redhat.com>) v4: - Add previous #13 in v2 back after dicussion with the RFC author. - Add TCP_ACCECN_OPTION_PERSIST to tcp_ecn_option sysctl to ignore AccECN fallback policy on sending AccECN option. v3: - Add additional min() check if pkts_acked_ewma is not initialized in #1. (Paolo Abeni <pabeni(a)redhat.com>) - Change TCP_CONG_WANTS_ECT_1 into individual flag add helper function INET_ECN_xmit_wants_ect_1() in #3. (Paolo Abeni <pabeni(a)redhat.com>) - Add empty line between variable declarations and code in #4. (Paolo Abeni <pabeni(a)redhat.com>) - Update commit message to fix old AccECN commits in #5. (Paolo Abeni <pabeni(a)redhat.com>) - Remove unnecessary brackets in #10. (Paolo Abeni <pabeni(a)redhat.com>) - Move patch #3 in v2 to a later Prague patch serise and remove patch #13 in v2. (Paolo Abeni <pabeni(a)redhat.com>) --- Chia-Yu Chang (12): net: update commnets for SKB_GSO_TCP_ECN and SKB_GSO_TCP_ACCECN selftests/net: gro: add self-test for TCP CWR flag tcp: L4S ECT(1) identifier and NEEDS_ACCECN for CC modules tcp: disable RFC3168 fallback identifier for CC modules tcp: accecn: handle unexpected AccECN negotiation feedback tcp: accecn: retransmit downgraded SYN in AccECN negotiation tcp: move increment of num_retrans tcp: accecn: retransmit SYN/ACK without AccECN option or non-AccECN SYN/ACK tcp: accecn: unset ECT if receive or send ACE=0 in AccECN negotiaion tcp: accecn: fallback outgoing half link to non-AccECN tcp: accecn: detect loss ACK w/ AccECN option and add TCP_ACCECN_OPTION_PERSIST tcp: accecn: enable AccECN Ilpo Järvinen (2): tcp: try to avoid safer when ACKs are thinned gro: flushing when CWR is set negatively affects AccECN Documentation/networking/ip-sysctl.rst | 4 +- .../networking/net_cachelines/tcp_sock.rst | 1 + include/linux/skbuff.h | 13 ++- include/linux/tcp.h | 4 +- include/net/inet_ecn.h | 20 +++- include/net/tcp.h | 32 ++++++- include/net/tcp_ecn.h | 92 ++++++++++++++----- net/ipv4/sysctl_net_ipv4.c | 4 +- net/ipv4/tcp.c | 2 + net/ipv4/tcp_cong.c | 10 +- net/ipv4/tcp_input.c | 37 +++++++- net/ipv4/tcp_minisocks.c | 40 +++++--- net/ipv4/tcp_offload.c | 3 +- net/ipv4/tcp_output.c | 42 ++++++--- tools/testing/selftests/net/gro.c | 80 +++++++++++----- 15 files changed, 294 insertions(+), 90 deletions(-) -- 2.34.1

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