Greeting, FYI, we noticed the following commit (built with gcc-11): commit: a6cb305191dd85350290fd66aeea8e62e33562f9 ("[PATCH 2/3] cpufreq: Panic if policy is active in cpufreq_policy_free()") url: https://github.com/intel-lab-lkp/linux/commits/Viresh-Kumar/cpufreq-Minor-cleanups/20220526-195434 base: https://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git linux-next patch link: https://lore.kernel.org/linux-pm/8c3d50faf8811e86136fb3f9c459e43fc3c50bc0.1653565641.git.viresh.kumar@linaro.org in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +------------------------------------------+------------+------------+ | | a1f8da428b | a6cb305191 | +------------------------------------------+------------+------------+ | boot_successes | 15 | 0 | | boot_failures | 0 | 13 | | kernel_BUG_at_drivers/cpufreq/cpufreq.c | 0 | 13 | | invalid_opcode:#[##] | 0 | 13 | | RIP:cpufreq_policy_free | 0 | 13 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 13 | +------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 10.343913][ T200] kernel BUG at drivers/cpufreq/cpufreq.c:1291! [ 10.345025][ T200] invalid opcode: 0000 [#1] SMP PTI [ 10.345958][ T200] CPU: 1 PID: 200 Comm: systemd-udevd Not tainted 5.18.0-02127-ga6cb305191dd #1 [ 10.347496][ T200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014 [ 10.349232][ T200] RIP: 0010:cpufreq_policy_free (drivers/cpufreq/cpufreq.c:1291 (discriminator 1)) [ 10.349244][ T200] Code: e6 ff ff 48 8b 7d 10 e8 bc 47 c5 ff 48 8b 7d 08 e8 b3 47 c5 ff 48 8b 7d 00 e8 aa 47 c5 ff 48 89 ef 5b 5d 41 5c e9 de 09 97 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 All code ======== 0: e6 ff out %al,$0xff 2: ff 48 8b decl -0x75(%rax) 5: 7d 10 jge 0x17 7: e8 bc 47 c5 ff callq 0xffffffffffc547c8 c: 48 8b 7d 08 mov 0x8(%rbp),%rdi 10: e8 b3 47 c5 ff callq 0xffffffffffc547c8 15: 48 8b 7d 00 mov 0x0(%rbp),%rdi 19: e8 aa 47 c5 ff callq 0xffffffffffc547c8 1e: 48 89 ef mov %rbp,%rdi 21: 5b pop %rbx 22: 5d pop %rbp 23: 41 5c pop %r12 25: e9 de 09 97 ff jmpq 0xffffffffff970a08 2a:* 0f 0b ud2 <-- trapping instruction 2c: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 33: 00 00 00 00 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 00 d: 66 data16 e: 66 data16 f: 2e cs 10: 0f .byte 0xf 11: 1f (bad) 12: 84 00 test %al,(%rax) ... [ 10.349247][ T200] RSP: 0018:ffffbdf4405abca0 EFLAGS: 00010293 [ 10.349251][ T200] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 10.349253][ T200] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff96e640375618 [ 10.349255][ T200] RBP: ffff96e6c5775c00 R08: ffffbdf4405aba24 R09: 0000000000000002 [ 10.349257][ T200] R10: 00000000fffffffb R11: ffffddf43fc029d0 R12: 00000000fffffffb [ 10.349259][ T200] R13: 0000000000000000 R14: ffff96e6c5775dd0 R15: 0000000000000001 [ 10.349261][ T200] FS: 0000000000000000(0000) GS:ffff96e96fd00000(0063) knlGS:00000000f7bca800 [ 10.349267][ T200] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 10.349269][ T200] CR2: 0000000056e2c164 CR3: 000000042fcd2000 CR4: 00000000000406e0 [ 10.349271][ T200] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 10.349273][ T200] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 10.349275][ T200] Call Trace: [ 10.349304][ T200] [ 10.349308][ T200] cpufreq_online (drivers/cpufreq/cpufreq.c:1562) [ 10.349314][ T200] cpufreq_add_dev (drivers/cpufreq/cpufreq.c:1578) [ 10.349318][ T200] subsys_interface_register (drivers/base/bus.c:1036) [ 10.349328][ T200] ? 0xffffffffc0071000 [ 10.349330][ T200] cpufreq_register_driver (drivers/cpufreq/cpufreq.c:2872) [ 10.349333][ T200] acpi_cpufreq_init (drivers/cpufreq/acpi-cpufreq.c:286) acpi_cpufreq [ 10.349342][ T200] do_one_initcall (init/main.c:1295) [ 10.349348][ T200] ? __cond_resched (kernel/sched/core.c:8181) [ 10.349354][ T200] ? kmem_cache_alloc_trace (mm/slub.c:3219 mm/slub.c:3225 mm/slub.c:3256) [ 10.349362][ T200] do_init_module (kernel/module.c:3731) [ 10.349366][ T200] __do_sys_finit_module (kernel/module.c:4222) [ 10.349369][ T200] __do_fast_syscall_32 (arch/x86/entry/common.c:112 arch/x86/entry/common.c:178) [ 10.349376][ T200] do_fast_syscall_32 (arch/x86/entry/common.c:203) [ 10.349379][ T200] entry_SYSENTER_compat_after_hwframe (arch/x86/entry/entry_64_compat.S:117) [ 10.349385][ T200] RIP: 0023:0xf7f01549 [ 10.349388][ T200] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 All code ======== 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 2a:* 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi Code starting with the faulting instruction =========================================== 0: 5d pop %rbp 1: 5a pop %rdx 2: 59 pop %rcx 3: c3 retq 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi f: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi To reproduce: # build kernel cd linux cp config-5.18.0-02127-ga6cb305191dd .config make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH= modules_install cd find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. -- 0-DAY CI Kernel Test Service https://01.org/lkp