- Linux-stable-mirror - lists.linaro.org

by Limonciello, Mario

[Public] Hi, We had noticed some WCN6855 hardware we have BT wasn't working in the LTS kernel. The IDs for the variants we have were introduced in 6.2. Can you please add this to 6.1.y? ca2a99447e17 ("Bluetooth: btusb: Add more device IDs for WCN6855") Thanks,

2 years, 8 months

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[PATCH 0/5] binder: Apply 4 missing stable fixes into v5.15.y

by Lee Jones

These patches are present in all other Stable versions. Alessandro Astone (2): binder: Address corner cases in deferred copy and fixup binder: Gracefully handle BINDER_TYPE_FDA objects with num_fds=0 Arnd Bergmann (1): binder: fix pointer cast warning Todd Kjos (2): binder: read pre-translated fds from sender buffer binder: defer copies of pre-patched txn data drivers/android/binder.c | 343 +++++++++++++++++++++++++++++++++++---- 1 file changed, 313 insertions(+), 30 deletions(-) -- 2.39.2.637.g21b0678d19-goog

2 years, 8 months

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static call fixes for clang's conditional tail calls (6.2 and 6.1)

by Nathan Chancellor

Hi Greg and Sasha, Please consider applying the following commits to 6.2 (they apply cleanly with some fuzz for me): db7adcfd1cec ("x86/alternatives: Introduce int3_emulate_jcc()") ac0ee0a9560c ("x86/alternatives: Teach text_poke_bp() to patch Jcc.d32 instructions") 923510c88d2b ("x86/static_call: Add support for Jcc tail-calls") I have attached backports to 6.1. Without these changes, kernels built with any version of clang using -Os or clang 17.0.0 (tip of tree) at any kernel-supported optimization level do not boot. This has been tested by people affected by this problem, see https://github.com/ClangBuiltLinux/linux/issues/1774 for more info. If there are any problems, please let me know. Cheers, Nathan

2 years, 8 months

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stable-rc/queue/5.10 baseline: 94 runs, 14 regressions (v5.10.169-14-g10046c397159)

by kernelci.org bot

stable-rc/queue/5.10 baseline: 94 runs, 14 regressions (v5.10.169-14-g10046c397159) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ beaglebone-black | arm | lab-broonie | gcc-10 | omap2plus_defconfig | 1 qemu_i386-uefi | i386 | lab-baylibre | gcc-10 | i386_defconfig | 1 qemu_i386-uefi | i386 | lab-broonie | gcc-10 | i386_defconfig | 1 qemu_i386-uefi | i386 | lab-collabora | gcc-10 | i386_defconfig | 1 qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-collabora | gcc-10 | x86_64_defcon...6-chromebook | 1 sun8i-h3-libretech-all-h3-cc | arm | lab-baylibre | gcc-10 | multi_v7_defconfig | 1 Details: https://kernelci.org/test/job/stable-rc/branch/queue%2F5.10/kernel/v5.10.16… Test: baseline Tree: stable-rc Branch: queue/5.10 Describe: v5.10.169-14-g10046c397159 URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git SHA: 10046c397159f19f2df4b85bf7690af2b18fb356 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ beaglebone-black | arm | lab-broonie | gcc-10 | omap2plus_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fe32c775a1ef378c8653 Results: 5 PASS, 1 FAIL, 1 SKIP Full config: omap2plus_defconfig Compiler: gcc-10 (arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.bootrr.deferred-probe-empty: https://kernelci.org/test/case/id/63f6fe32c775a1ef378c865c failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) 2023-02-23T05:48:15.217874 <8>[ 19.821983] <LAVA_SIGNAL_ENDRUN 0_dmesg 59998_1.5.2.4.1> 2023-02-23T05:48:15.323904 / # # 2023-02-23T05:48:15.425676 export SHELL=/bin/sh 2023-02-23T05:48:15.426080 # 2023-02-23T05:48:15.527407 / # export SHELL=/bin/sh. /lava-59998/environment 2023-02-23T05:48:15.527833 2023-02-23T05:48:15.629153 / # . /lava-59998/environment/lava-59998/bin/lava-test-runner /lava-59998/1 2023-02-23T05:48:15.629859 2023-02-23T05:48:15.634461 / # /lava-59998/bin/lava-test-runner /lava-59998/1 2023-02-23T05:48:15.739392 + export 'TESTRUN_ID=1_bootrr' ... (11 line(s) more) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_i386-uefi | i386 | lab-baylibre | gcc-10 | i386_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fa9e2cff5bb2d38c8654 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: i386_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fa9e2cff5bb2d38c8655 failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_i386-uefi | i386 | lab-broonie | gcc-10 | i386_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fa72aca93ad0e38c86ae Results: 0 PASS, 1 FAIL, 0 SKIP Full config: i386_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fa72aca93ad0e38c86af failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_i386-uefi | i386 | lab-collabora | gcc-10 | i386_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fa73aca93ad0e38c86ce Results: 0 PASS, 1 FAIL, 0 SKIP Full config: i386_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fa73aca93ad0e38c86cf failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6fb2a38fde1409d8c86bb Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fb2a38fde1409d8c86bc failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fbf27824f3aad18c863c Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fbf27824f3aad18c863d failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6faff312c9599a18c8677 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6faff312c9599a18c8678 failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fc2cd51515c3d18c86b7 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fc2cd51515c3d18c86b8 failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6fb297e17b7b4de8c8640 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fb297e17b7b4de8c8641 failing since 8 days (last pass: v5.10.167-123-g60f1e5752ec8, first fail: v5.10.167-139-g8b1e92c42811) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fc1a2ceac4da3a8c8652 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fc1a2ceac4da3a8c8653 failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6fafe312c9599a18c8672 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fafe312c9599a18c8673 failing since 8 days (last pass: v5.10.167-123-g60f1e5752ec8, first fail: v5.10.167-139-g8b1e92c42811) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fc3eeb04c907688c8634 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fc3eeb04c907688c8635 failing since 9 days (last pass: v5.10.167-127-g921934d621e4, first fail: v5.10.167-139-gf9519a5a1701) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-collabora | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6faec2ce910d75f8c8663 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6faec2ce910d75f8c8664 failing since 8 days (last pass: v5.10.167-123-g60f1e5752ec8, first fail: v5.10.167-139-g8b1e92c42811) platform | arch | lab | compiler | defconfig | regressions -----------------------------+--------+---------------+----------+------------------------------+------------ sun8i-h3-libretech-all-h3-cc | arm | lab-baylibre | gcc-10 | multi_v7_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6fcad0c49eb6a8f8c865f Results: 5 PASS, 1 FAIL, 1 SKIP Full config: multi_v7_defconfig Compiler: gcc-10 (arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… HTML log: https://storage.kernelci.org//stable-rc/queue-5.10/v5.10.169-14-g10046c3971… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.bootrr.deferred-probe-empty: https://kernelci.org/test/case/id/63f6fcad0c49eb6a8f8c8668 failing since 21 days (last pass: v5.10.165-139-gefb57ce0f880, first fail: v5.10.165-149-ge30e8271d674) 2023-02-23T05:41:34.413267 <8>[ 7.416093] <LAVA_SIGNAL_ENDRUN 0_dmesg 3367753_1.5.2.4.1> 2023-02-23T05:41:34.518608 / # # 2023-02-23T05:41:34.620288 export SHELL=/bin/sh 2023-02-23T05:41:34.620651 # 2023-02-23T05:41:34.721969 / # export SHELL=/bin/sh. /lava-3367753/environment 2023-02-23T05:41:34.722319 2023-02-23T05:41:34.823659 / # . /lava-3367753/environment/lava-3367753/bin/lava-test-runner /lava-3367753/1 2023-02-23T05:41:34.824259 2023-02-23T05:41:34.829820 / # /lava-3367753/bin/lava-test-runner /lava-3367753/1 2023-02-23T05:41:34.893926 + export 'TESTRUN_ID=1_bootrr' ... (11 line(s) more)

2 years, 8 months

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Greetings i trust this message fine's you well.

by Mrs. Anne Engelbrecht

-- PLEASE FINE ATTACHMENT

2 years, 8 months

1
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stable-rc/queue/5.15 baseline: 111 runs, 14 regressions (v5.15.95-22-ge3db54e2342c)

by kernelci.org bot

stable-rc/queue/5.15 baseline: 111 runs, 14 regressions (v5.15.95-22-ge3db54e2342c) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ imx53-qsrb | arm | lab-pengutronix | gcc-10 | multi_v7_defconfig | 1 qemu_i386-uefi | i386 | lab-baylibre | gcc-10 | i386_defconfig | 1 qemu_i386-uefi | i386 | lab-broonie | gcc-10 | i386_defconfig | 1 qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi | x86_64 | lab-collabora | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi | x86_64 | lab-collabora | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 qemu_x86_64-uefi-mixed | x86_64 | lab-collabora | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/job/stable-rc/branch/queue%2F5.15/kernel/v5.15.95… Test: baseline Tree: stable-rc Branch: queue/5.15 Describe: v5.15.95-22-ge3db54e2342c URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git SHA: e3db54e2342c2e6270444d5aebee9a04550900f6 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ imx53-qsrb | arm | lab-pengutronix | gcc-10 | multi_v7_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f655f00892eaa88c8630 Results: 5 PASS, 1 FAIL, 1 SKIP Full config: multi_v7_defconfig Compiler: gcc-10 (arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.bootrr.deferred-probe-empty: https://kernelci.org/test/case/id/63f6f655f00892eaa88c8639 failing since 26 days (last pass: v5.15.81-121-gcb14018a85f6, first fail: v5.15.90-146-gbf7101723cc0) 2023-02-23T05:14:38.926032 + set +x 2023-02-23T05:14:38.926188 [ 9.391390] <LAVA_SIGNAL_ENDRUN 0_dmesg 911517_1.5.2.3.1> 2023-02-23T05:14:39.036239 / # # 2023-02-23T05:14:39.137830 export SHELL=/bin/sh 2023-02-23T05:14:39.138161 # 2023-02-23T05:14:39.239434 / # export SHELL=/bin/sh. /lava-911517/environment 2023-02-23T05:14:39.239783 2023-02-23T05:14:39.340969 / # . /lava-911517/environment/lava-911517/bin/lava-test-runner /lava-911517/1 2023-02-23T05:14:39.341565 2023-02-23T05:14:39.344562 / # /lava-911517/bin/lava-test-runner /lava-911517/1 ... (12 line(s) more) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_i386-uefi | i386 | lab-baylibre | gcc-10 | i386_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f844f03c2787a38c868f Results: 0 PASS, 1 FAIL, 0 SKIP Full config: i386_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f844f03c2787a38c8690 failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_i386-uefi | i386 | lab-broonie | gcc-10 | i386_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f8a62274d46c518c866c Results: 0 PASS, 1 FAIL, 0 SKIP Full config: i386_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f8a62274d46c518c866d failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f8bd5c531a399b8c864b Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f8bd5c531a399b8c864c failing since 8 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-gf3091fc0051b) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6f921ae884c402f8c862f Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f921ae884c402f8c8630 failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f90a3002af8a798c8662 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f90a3002af8a798c8663 failing since 8 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-gf3091fc0051b) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6fa0e1ee32b0ea18c8683 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6fa0e1ee32b0ea18c8684 failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-collabora | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f891f5da8ee5eb8c8692 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f891f5da8ee5eb8c8693 failing since 8 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-gf3091fc0051b) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi | x86_64 | lab-collabora | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6f90ae0999157178c8645 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f90ae0999157178c8646 failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f8bc04440fb4548c864a Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f8bc04440fb4548c864b failing since 8 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-gf3091fc0051b) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-baylibre | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6f920a80b59bb1c8c863d Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f920a80b59bb1c8c863e failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f8ce5c531a399b8c8661 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f8ce5c531a399b8c8662 failing since 8 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-gf3091fc0051b) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-broonie | gcc-10 | x86_64_defcon...6-chromebook | 1 Details: https://kernelci.org/test/plan/id/63f6f96e0e41a04cd48c8635 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig+x86-chromebook Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f96e0e41a04cd48c8636 failing since 9 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-g85c6595a0daa) platform | arch | lab | compiler | defconfig | regressions -----------------------+--------+-----------------+----------+------------------------------+------------ qemu_x86_64-uefi-mixed | x86_64 | lab-collabora | gcc-10 | x86_64_defconfig | 1 Details: https://kernelci.org/test/plan/id/63f6f893f5da8ee5eb8c8695 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: x86_64_defconfig Compiler: gcc-10 (gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… HTML log: https://storage.kernelci.org//stable-rc/queue-5.15/v5.15.95-22-ge3db54e2342… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2023… * baseline.login: https://kernelci.org/test/case/id/63f6f893f5da8ee5eb8c8696 failing since 8 days (last pass: v5.15.93-48-g91b0616b8246, first fail: v5.15.93-67-gf3091fc0051b)

2 years, 8 months

1
0
0 0

[PATCH 4/5] lib/Kconfig.debug: Use CONFIG_PAHOLE_VERSION

by maennich＠google.com

From: Nathan Chancellor <nathan(a)kernel.org> Now that CONFIG_PAHOLE_VERSION exists, use it in the definition of CONFIG_PAHOLE_HAS_SPLIT_BTF and CONFIG_PAHOLE_HAS_BTF_TAG to reduce the amount of duplication across the tree. Signed-off-by: Nathan Chancellor <nathan(a)kernel.org> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Andrii Nakryiko <andrii(a)kernel.org> Link: https://lore.kernel.org/bpf/20220201205624.652313-5-nathan@kernel.org Signed-off-by: Matthias Maennich <maennich(a)google.com> --- lib/Kconfig.debug | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f71db0cc3bf1..0743c9567d7e 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -328,7 +328,15 @@ config DEBUG_INFO_BTF DWARF type info into equivalent deduplicated BTF type info. config PAHOLE_HAS_SPLIT_BTF - def_bool $(success, test `$(PAHOLE) --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/'` -ge "119") + def_bool PAHOLE_VERSION >= 119 + +config PAHOLE_HAS_BTF_TAG + def_bool PAHOLE_VERSION >= 123 + depends on CC_IS_CLANG + help + Decide whether pahole emits btf_tag attributes (btf_type_tag and + btf_decl_tag) or not. Currently only clang compiler implements + these attributes, so make the config depend on CC_IS_CLANG. config DEBUG_INFO_BTF_MODULES def_bool y -- 2.39.2.637.g21b0678d19-goog

2 years, 8 months

2
1
0 0

[PATCH 6.1/5.15/5.10/5.4 1/1] KVM: VMX: Execute IBPB on emulated VM-exit when guest has IBRS

by Ovidiu Panait

From: Jim Mattson <jmattson(a)google.com> commit 2e7eab81425ad6c875f2ed47c0ce01e78afc38a5 upstream. According to Intel's document on Indirect Branch Restricted Speculation, "Enabling IBRS does not prevent software from controlling the predicted targets of indirect branches of unrelated software executed later at the same predictor mode (for example, between two different user applications, or two different virtual machines). Such isolation can be ensured through use of the Indirect Branch Predictor Barrier (IBPB) command." This applies to both basic and enhanced IBRS. Since L1 and L2 VMs share hardware predictor modes (guest-user and guest-kernel), hardware IBRS is not sufficient to virtualize IBRS. (The way that basic IBRS is implemented on pre-eIBRS parts, hardware IBRS is actually sufficient in practice, even though it isn't sufficient architecturally.) For virtual CPUs that support IBRS, add an indirect branch prediction barrier on emulated VM-exit, to ensure that the predicted targets of indirect branches executed in L1 cannot be controlled by software that was executed in L2. Since we typically don't intercept guest writes to IA32_SPEC_CTRL, perform the IBPB at emulated VM-exit regardless of the current IA32_SPEC_CTRL.IBRS value, even though the IBPB could technically be deferred until L1 sets IA32_SPEC_CTRL.IBRS, if IA32_SPEC_CTRL.IBRS is clear at emulated VM-exit. This is CVE-2022-2196. Fixes: 5c911beff20a ("KVM: nVMX: Skip IBPB when switching between vmcs01 and vmcs02") Cc: Sean Christopherson <seanjc(a)google.com> Signed-off-by: Jim Mattson <jmattson(a)google.com> Reviewed-by: Sean Christopherson <seanjc(a)google.com> Link: https://lore.kernel.org/r/20221019213620.1953281-3-jmattson@google.com Signed-off-by: Sean Christopherson <seanjc(a)google.com> Signed-off-by: Ovidiu Panait <ovidiu.panait(a)eng.windriver.com> --- arch/x86/kvm/vmx/nested.c | 11 +++++++++++ arch/x86/kvm/vmx/vmx.c | 6 ++++-- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index cdebeceedbd0..f3c136548af6 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -4617,6 +4617,17 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason, vmx_switch_vmcs(vcpu, &vmx->vmcs01); + /* + * If IBRS is advertised to the vCPU, KVM must flush the indirect + * branch predictors when transitioning from L2 to L1, as L1 expects + * hardware (KVM in this case) to provide separate predictor modes. + * Bare metal isolates VMX root (host) from VMX non-root (guest), but + * doesn't isolate different VMCSs, i.e. in this case, doesn't provide + * separate modes for L2 vs L1. + */ + if (guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL)) + indirect_branch_prediction_barrier(); + /* Update any VMCS fields that might have changed while L2 ran */ vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr); vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr); diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 0718658268fe..c849173b60c2 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1332,8 +1332,10 @@ void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, /* * No indirect branch prediction barrier needed when switching - * the active VMCS within a guest, e.g. on nested VM-Enter. - * The L1 VMM can protect itself with retpolines, IBPB or IBRS. + * the active VMCS within a vCPU, unless IBRS is advertised to + * the vCPU. To minimize the number of IBPBs executed, KVM + * performs IBPB on nested VM-Exit (a single nested transition + * may switch the active VMCS multiple times). */ if (!buddy || WARN_ON_ONCE(buddy->vmcs != prev)) indirect_branch_prediction_barrier(); -- 2.39.1

2 years, 8 months

2
1
0 0

[PATCH 5.15/5.10/5.4/4.19 1/1] drm/i915/gvt: fix double free bug in split_2MB_gtt_entry

by Ovidiu Panait

From: Zheng Wang <zyytlz.wz(a)163.com> commit 4a61648af68f5ba4884f0e3b494ee1cabc4b6620 upstream. If intel_gvt_dma_map_guest_page failed, it will call ppgtt_invalidate_spt, which will finally free the spt. But the caller function ppgtt_populate_spt_by_guest_entry does not notice that, it will free spt again in its error path. Fix this by canceling the mapping of DMA address and freeing sub_spt. Besides, leave the handle of spt destroy to caller function instead of callee function when error occurs. Fixes: b901b252b6cf ("drm/i915/gvt: Add 2M huge gtt support") Signed-off-by: Zheng Wang <zyytlz.wz(a)163.com> Reviewed-by: Zhenyu Wang <zhenyuw(a)linux.intel.com> Signed-off-by: Zhenyu Wang <zhenyuw(a)linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20221229165641.1192455-1-zyytl… Signed-off-by: Ovidiu Panait <ovidiu.panait(a)eng.windriver.com> --- Backport of CVE-2022-3707 fix. drivers/gpu/drm/i915/gvt/gtt.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c index e5c2fdfc20e3..7ea7abef6143 100644 --- a/drivers/gpu/drm/i915/gvt/gtt.c +++ b/drivers/gpu/drm/i915/gvt/gtt.c @@ -1195,10 +1195,8 @@ static int split_2MB_gtt_entry(struct intel_vgpu *vgpu, for_each_shadow_entry(sub_spt, &sub_se, sub_index) { ret = intel_gvt_hypervisor_dma_map_guest_page(vgpu, start_gfn + sub_index, PAGE_SIZE, &dma_addr); - if (ret) { - ppgtt_invalidate_spt(spt); - return ret; - } + if (ret) + goto err; sub_se.val64 = se->val64; /* Copy the PAT field from PDE. */ @@ -1217,6 +1215,17 @@ static int split_2MB_gtt_entry(struct intel_vgpu *vgpu, ops->set_pfn(se, sub_spt->shadow_page.mfn); ppgtt_set_shadow_entry(spt, se, index); return 0; +err: + /* Cancel the existing addess mappings of DMA addr. */ + for_each_present_shadow_entry(sub_spt, &sub_se, sub_index) { + gvt_vdbg_mm("invalidate 4K entry\n"); + ppgtt_invalidate_pte(sub_spt, &sub_se); + } + /* Release the new allocated spt. */ + trace_spt_change(sub_spt->vgpu->id, "release", sub_spt, + sub_spt->guest_page.gfn, sub_spt->shadow_page.type); + ppgtt_free_spt(sub_spt); + return ret; } static int split_64KB_gtt_entry(struct intel_vgpu *vgpu, -- 2.39.1

2 years, 8 months

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FAILED: patch "[PATCH] alarmtimer: Prevent starvation by small intervals and SIG_IGN" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. Possible dependencies: d125d1349abe ("alarmtimer: Prevent starvation by small intervals and SIG_IGN") 41b3b8dffc1f ("alarmtimer: Rename gettime() callback to get_ktime()") 5f936e19cc0e ("alarmtimer: Prevent overflow for relative nanosleep") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From d125d1349abeb46945dc5e98f7824bf688266f13 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner <tglx(a)linutronix.de> Date: Thu, 9 Feb 2023 23:25:49 +0100 Subject: [PATCH] alarmtimer: Prevent starvation by small intervals and SIG_IGN syzbot reported a RCU stall which is caused by setting up an alarmtimer with a very small interval and ignoring the signal. The reproducer arms the alarm timer with a relative expiry of 8ns and an interval of 9ns. Not a problem per se, but that's an issue when the signal is ignored because then the timer is immediately rearmed because there is no way to delay that rearming to the signal delivery path. See posix_timer_fn() and commit 58229a189942 ("posix-timers: Prevent softirq starvation by small intervals and SIG_IGN") for details. The reproducer does not set SIG_IGN explicitely, but it sets up the timers signal with SIGCONT. That has the same effect as explicitely setting SIG_IGN for a signal as SIGCONT is ignored if there is no handler set and the task is not ptraced. The log clearly shows that: [pid 5102] --- SIGCONT {si_signo=SIGCONT, si_code=SI_TIMER, si_timerid=0, si_overrun=316014, si_int=0, si_ptr=NULL} --- It works because the tasks are traced and therefore the signal is queued so the tracer can see it, which delays the restart of the timer to the signal delivery path. But then the tracer is killed: [pid 5087] kill(-5102, SIGKILL <unfinished ...> ... ./strace-static-x86_64: Process 5107 detached and after it's gone the stall can be observed: syzkaller login: [ 79.439102][ C0] hrtimer: interrupt took 68471 ns [ 184.460538][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: ... [ 184.658237][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 184.664574][ C1] Sending NMI from CPU 1 to CPUs 0: [ 184.669821][ C0] NMI backtrace for cpu 0 [ 184.669831][ C0] CPU: 0 PID: 5108 Comm: syz-executor192 Not tainted 6.2.0-rc6-next-20230203-syzkaller #0 ... [ 184.670036][ C0] Call Trace: [ 184.670041][ C0] <IRQ> [ 184.670045][ C0] alarmtimer_fired+0x327/0x670 posix_timer_fn() prevents that by checking whether the interval for timers which have the signal ignored is smaller than a jiffie and artifically delay it by shifting the next expiry out by a jiffie. That's accurate vs. the overrun accounting, but slightly inaccurate vs. timer_gettimer(2). The comment in that function says what needs to be done and there was a fix available for the regular userspace induced SIG_IGN mechanism, but that did not work due to the implicit ignore for SIGCONT and similar signals. This needs to be worked on, but for now the only available workaround is to do exactly what posix_timer_fn() does: Increase the interval of self-rearming timers, which have their signal ignored, to at least a jiffie. Interestingly this has been fixed before via commit ff86bf0c65f1 ("alarmtimer: Rate limit periodic intervals") already, but that fix got lost in a later rework. Reported-by: syzbot+b9564ba6e8e00694511b(a)syzkaller.appspotmail.com Fixes: f2c45807d399 ("alarmtimer: Switch over to generic set/get/rearm routine") Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Acked-by: John Stultz <jstultz(a)google.com> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/87k00q1no2.ffs@tglx diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 5897828b9d7e..7e5dff602585 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -470,11 +470,35 @@ u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval) } EXPORT_SYMBOL_GPL(alarm_forward); -u64 alarm_forward_now(struct alarm *alarm, ktime_t interval) +static u64 __alarm_forward_now(struct alarm *alarm, ktime_t interval, bool throttle) { struct alarm_base *base = &alarm_bases[alarm->type]; + ktime_t now = base->get_ktime(); + + if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && throttle) { + /* + * Same issue as with posix_timer_fn(). Timers which are + * periodic but the signal is ignored can starve the system + * with a very small interval. The real fix which was + * promised in the context of posix_timer_fn() never + * materialized, but someone should really work on it. + * + * To prevent DOS fake @now to be 1 jiffie out which keeps + * the overrun accounting correct but creates an + * inconsistency vs. timer_gettime(2). + */ + ktime_t kj = NSEC_PER_SEC / HZ; + + if (interval < kj) + now = ktime_add(now, kj); + } + + return alarm_forward(alarm, now, interval); +} - return alarm_forward(alarm, base->get_ktime(), interval); +u64 alarm_forward_now(struct alarm *alarm, ktime_t interval) +{ + return __alarm_forward_now(alarm, interval, false); } EXPORT_SYMBOL_GPL(alarm_forward_now); @@ -551,9 +575,10 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm, if (posix_timer_event(ptr, si_private) && ptr->it_interval) { /* * Handle ignored signals and rearm the timer. This will go - * away once we handle ignored signals proper. + * away once we handle ignored signals proper. Ensure that + * small intervals cannot starve the system. */ - ptr->it_overrun += alarm_forward_now(alarm, ptr->it_interval); + ptr->it_overrun += __alarm_forward_now(alarm, ptr->it_interval, true); ++ptr->it_requeue_pending; ptr->it_active = 1; result = ALARMTIMER_RESTART;

2 years, 8 months

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