Greeting, FYI, we noticed the following commit (built with gcc-9): commit: b9cdb2bd97667fa8dd8abe4fe0b1394b966ef7e3 ("bpf: introduce bpf timer") https://github.com/congwang/linux.git bpf-timer in testcase: boot on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; [ 31.208889] systemd[1]: RTC configured in localtime, applying delta of 0 minutes to system time. [ 31.217824] systemd[1]: System time before build time, advancing clock. [ 31.242214] failed to validate module [ip_tables] BTF: -2 [ 31.683287] failed to validate module [acpi_cpufreq] BTF: -2 [ 31.696708] failed to validate module [acpi_pad] BTF: -2 [ 31.703638] failed to validate module [intel_pmc_core] BTF: -2 Startin [ 31.710167] failed to validate module [acpi_cpufreq] BTF: -2 [ 31.732888] failed to validate module [video] BTF: -2 Startin [ 31.767753] failed to validate module [acpi_cpufreq] BTF: -2 m. [ 31.852330] failed to validate module [mei] BTF: -2 [ 31.852330] failed to validate module [intel_pmc_core] BTF: -2 [ 31.852330] failed to validate module [acpi_cpufreq] BTF: -2 [ 31.870770] failed to validate module [acpi_pad] BTF: -2 [ 31.871079] failed to validate module [libata] BTF: -2 [ 31.884856] failed to validate module [wmi] BTF: -2 [ 31.890079] failed to validate module [intel_uncore] BTF: -2 [ 31.954543] failed to validate module [intel_uncore] BTF: -2 [ 32.011953] failed to validate module [acpi_cpufreq] BTF: -2 [ 32.058324] failed to validate module [intel_cstate] BTF: -2 [ 32.064178] failed to validate module [acpi_cpufreq] BTF: -2 [ 32.078304] failed to validate module [rapl] BTF: -2 [ 32.083448] failed to validate module [intel_uncore] BTF: -2 [ 32.130078] failed to validate module [intel_cstate] BTF: -2 [ 32.136545] failed to validate module [rapl] BTF: -2 [ 32.189416] failed to validate module [intel_cstate] BTF: -2 [ 32.195229] failed to validate module [rapl] BTF: -2 [ 31.228026] r [ 32.210542] failed to validate module [ghash_clmulni_intel] BTF: -2 c.local[285]: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/lkp/lkp/src/bin [ 32.238358] random: ln: uninitialized urandom read (6 bytes read) [ 32.253358] failed to validate module [rapl] BTF: -2 [ 32.254758] random: ln: uninitialized urandom read (6 bytes read) m. [ 32.286749] failed to validate module [crc32c_intel] BTF: -2 LKP: HOSTNAME lkp-skl-d05, MAC f6:ad:96:0f:48:8d, kernel 5.12.0-15025-gb9cdb2bd9766 1, serial console /dev/ttyS0 [ 32.320287] failed to validate module [crct10dif_pclmul] BTF: -2 [ 32.326988] failed to validate module [ghash_clmulni_intel] BTF: -2 Startin [ 32.333604] failed to validate module [crc32c_intel] BTF: -2 [ 32.348227] failed to validate module [crc32_pclmul] BTF: -2 [ 32.405337] failed to validate module [crc32c_intel] BTF: -2 1;39m/etc/rc.loc [ 32.457936] failed to validate module [crc32_pclmul] BTF: -2 [ 32.468416] failed to validate module [coretemp] BTF: -2 [ 32.507922] failed to validate module [coretemp] BTF: -2 [ 32.513360] failed to validate module [x86_pkg_temp_thermal] BTF: -2 [ 32.519940] failed to validate module [crct10dif_pclmul] BTF: -2 [ 32.536356] failed to validate module [intel_powerclamp] BTF: -2 [ 32.582719] failed to validate module [coretemp] BTF: -2 See 'systemctl status openipmi.s [ 32.603361] failed to validate module [intel_powerclamp] BTF: -2 ervice' for deta [ 32.610174] failed to validate module [intel_pmc_core] BTF: -2 ils. [ 32.631520] failed to validate module [x86_pkg_temp_thermal] BTF: -2 [ 32.638092] failed to validate module [intel_powerclamp] BTF: -2 [ 32.673200] failed to validate module [intel_pmc_core_pltdrv] BTF: -2 [ 32.679832] failed to validate module [x86_pkg_temp_thermal] BTF: -2 [ 32.707891] failed to validate module [acpi_cpufreq] BTF: -2 [ 32.713995] failed to validate module [x86_pkg_temp_thermal] BTF: -2 [ 32.720517] failed to validate module [intel_rapl_common] BTF: -2 [ 32.736487] failed to validate module [acpi_cpufreq] BTF: -2 [ 32.760486] failed to validate module [intel_pmc_core] BTF: -2 [ 32.781730] failed to validate module [intel_pmc_core] BTF: -2 [ 32.787973] failed to validate module [acpi_cpufreq] BTF: -2 [ 32.795877] failed to validate module [intel_pmc_core_pltdrv] BTF: -2 [ 32.828602] failed to validate module [intel_pmc_core] BTF: -2 [ 32.834799] failed to validate module [intel_pmc_core_pltdrv] BTF: -2 [ 32.852287] failed to validate module [intel_rapl_common] BTF: -2 [ 32.862013] failed to validate module [intel_pmc_core_pltdrv] BTF: -2 [ 32.886439] failed to validate module [intel_rapl_common] BTF: -2 [ 32.910564] failed to validate module [intel_rapl_common] BTF: -2 [ 33.828281] random: crng init done [ 33.831816] random: 2 urandom warning(s) missed due to ratelimiting [ 36.876669] Kernel tests: Boot OK! [ 36.876675] [ 40.753445] install debs round one: dpkg -i --force-confdef --force-depends /opt/deb/ntpdate_1%3a4.2.8p12+dfsg-4_amd64.deb [ 40.753452] [ 40.766971] /opt/deb/gawk_1%3a4.2.1+dfsg-1_amd64.deb [ 40.766974] [ 40.774656] Selecting previously unselected package ntpdate. [ 40.774659] [ 40.783546] (Reading database ... 16553 files and directories currently installed.) [ 40.783549] [ 40.794318] Preparing to unpack .../ntpdate_1%3a4.2.8p12+dfsg-4_amd64.deb ... [ 40.794322] [ 40.803942] Unpacking ntpdate (1:4.2.8p12+dfsg-4) ... [ 40.803945] [ 40.811616] Selecting previously unselected package gawk. [ 40.811619] [ 40.819912] Preparing to unpack .../gawk_1%3a4.2.1+dfsg-1_amd64.deb ... [ 40.819915] [ 40.828893] Unpacking gawk (1:4.2.1+dfsg-1) ... [ 40.828896] [ 40.835934] Setting up ntpdate (1:4.2.8p12+dfsg-4) ... [ 40.835937] [ 40.843560] Setting up gawk (1:4.2.1+dfsg-1) ... [ 40.843563] [ 40.851770] 8 Jun 15:06:32 ntpdate[402]: step time server 192.168.1.200 offset 73025666.608553 sec [ 40.851774] [ 69.236706] can't load the disk /dev/disk/by-id/wwn-0x55cd2e4151977e28-part1, skip testing... To reproduce: # build kernel cd linux cp config-5.12.0-15025-gb9cdb2bd9766 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang