Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 77422ffeee9da53069006c1ed9eb0bab4ccf5aca ("dyndbg: RFC drop _ddebug.site pointer") https://github.com/jimc/linux.git dd-diet-6c2 in testcase: stress-ng version: stress-ng-x86_64-0.11-06_20210616 with following parameters: nr_threads: 10% disk: 1HDD testtime: 60s fs: ext4 class: os test: enosys cpufreq_governor: performance ucode: 0x5003006 on test machine: 96 threads 2 sockets Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 192G 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; [ 15.356920] WARNING: CPU: 44 PID: 1349 at kernel/trace/trace_events.c:369 test_event_printk (kbuild/src/consumer/kernel/trace/trace_events.c:369) [ 15.380633] Modules linked in: acpi_cpufreq(-) btrfs(+) blake2b_generic xor zstd_compress raid6_pq libcrc32c intel_rapl_msr intel_rapl_common sd_mod t10_pi sg skx_edac nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ipmi_ssif ghash_clmulni_intel ast drm_vram_helper rapl drm_ttm_helper intel_cstate ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci acpi_ipmi intel_uncore libahci mei_me drm ioatdma ipmi_si libata mei joydev intel_pch_thermal ipmi_devintf dca wmi ipmi_msghandler acpi_pad acpi_power_meter ip_tables [ 15.436906] CPU: 44 PID: 1349 Comm: modprobe Not tainted 5.13.0-rc6-00027-g77422ffeee9d #1 [ 15.445721] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019 [ 15.456704] RIP: 0010:test_event_printk (kbuild/src/consumer/kernel/trace/trace_events.c:369) [ 15.462133] Code: 8b 70 18 29 f9 4c 01 fa 41 f6 40 70 10 74 08 48 85 f6 74 03 48 8b 36 49 c7 c0 e0 ac 57 82 48 c7 c7 a8 af 57 82 e8 87 99 a6 00 <0f> 0b e9 ca fb ff ff 48 c7 c7 e2 ac 57 82 b9 05 00 00 00 48 89 d6 All code ======== 0: 8b 70 18 mov 0x18(%rax),%esi 3: 29 f9 sub %edi,%ecx 5: 4c 01 fa add %r15,%rdx 8: 41 f6 40 70 10 testb $0x10,0x70(%r8) d: 74 08 je 0x17 f: 48 85 f6 test %rsi,%rsi 12: 74 03 je 0x17 14: 48 8b 36 mov (%rsi),%rsi 17: 49 c7 c0 e0 ac 57 82 mov $0xffffffff8257ace0,%r8 1e: 48 c7 c7 a8 af 57 82 mov $0xffffffff8257afa8,%rdi 25: e8 87 99 a6 00 callq 0xa699b1 2a:* 0f 0b ud2 <-- trapping instruction 2c: e9 ca fb ff ff jmpq 0xfffffffffffffbfb 31: 48 c7 c7 e2 ac 57 82 mov $0xffffffff8257ace2,%rdi 38: b9 05 00 00 00 mov $0x5,%ecx 3d: 48 89 d6 mov %rdx,%rsi Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: e9 ca fb ff ff jmpq 0xfffffffffffffbd1 7: 48 c7 c7 e2 ac 57 82 mov $0xffffffff8257ace2,%rdi e: b9 05 00 00 00 mov $0x5,%ecx 13: 48 89 d6 mov %rdx,%rsi [ 15.482040] RSP: 0018:ffffc9000f52fc10 EFLAGS: 00010282 [ 15.487877] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027 [ 15.495641] RDX: 0000000000000027 RSI: 00000000ffff7fff RDI: ffff88afca917bf8 [ 15.503405] RBP: 0000000000000001 R08: ffff88afca917bf0 R09: ffffc9000f52fa30 [ 15.511159] R10: 0000000000000001 R11: 0000000000000001 R12: 000508b58019388f [ 15.518945] R13: 0000000000000029 R14: 000000000000012d R15: ffffffffc1148740 [ 15.526688] FS: 00007fed64c22480(0000) GS:ffff88afca900000(0000) knlGS:0000000000000000 [ 15.535407] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.541780] CR2: 00007f5534396b2b CR3: 000000303a208006 CR4: 00000000007706e0 [ 15.549543] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 15.557312] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 15.565082] PKRU: 55555554 [ 15.568417] Call Trace: [ 15.571492] trace_event_raw_init (kbuild/src/consumer/kernel/trace/trace_events.c:438) [ 15.576301] event_init (kbuild/src/consumer/kernel/trace/trace_events.c:2510) [ 15.580246] trace_module_notify (kbuild/src/consumer/kernel/trace/trace.c:8482) [ 15.585150] notifier_call_chain_robust (kbuild/src/consumer/kernel/notifier.c:83 kbuild/src/consumer/kernel/notifier.c:118) [ 15.590501] blocking_notifier_call_chain_robust (kbuild/src/consumer/kernel/notifier.c:303 kbuild/src/consumer/kernel/notifier.c:290) [ 15.596654] load_module (kbuild/src/consumer/include/linux/notifier.h:200 kbuild/src/consumer/kernel/module.c:3856 kbuild/src/consumer/kernel/module.c:4034) [ 15.600978] ? kernel_read_file (kbuild/src/consumer/fs/kernel_read_file.c:110) [ 15.605820] ? __do_sys_finit_module (kbuild/src/consumer/kernel/module.c:4158) [ 15.611012] __do_sys_finit_module (kbuild/src/consumer/kernel/module.c:4158) [ 15.616019] do_syscall_64 (kbuild/src/consumer/arch/x86/entry/common.c:47) [ 15.620250] entry_SYSCALL_64_after_hwframe (kbuild/src/consumer/arch/x86/entry/entry_64.S:112) [ 15.625966] RIP: 0033:0x7fed64d3cf59 [ 15.630203] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 07 6f 0c 00 f7 d8 64 89 01 48 All code ======== 0: 00 c3 add %al,%bl 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 8b 0d 07 6f 0c 00 mov 0xc6f07(%rip),%rcx # 0xc6f41 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 retq 9: 48 8b 0d 07 6f 0c 00 mov 0xc6f07(%rip),%rcx # 0xc6f17 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W [ 15.650389] RSP: 002b:00007ffe48a11078 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 15.658715] RAX: ffffffffffffffda RBX: 0000555abde1abb0 RCX: 00007fed64d3cf59 [ 15.666623] RDX: 0000000000000000 RSI: 0000555abd3ed3f0 RDI: 0000000000000005 [ 15.674531] RBP: 0000555abd3ed3f0 R08: 0000000000000000 R09: 0000000000000000 [ 15.682421] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000 [ 15.690323] R13: 0000555abde1b0a0 R14: 0000000000040000 R15: 0000555abde1abb0 [ 15.698173] ---[ end trace 4a3a0a80cf0409e6 ]--- To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run bin/lkp run generated-yaml-file --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang