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X-OriginatorOrg: intel.com Hello, kernel test robot noticed "RIP:kobject_get" on: commit: 01e1401d1389f3fe2815a3f391cb22224ff1bfb5 ("[PATCH] thermal/core: Fix double device initialization") url: https://github.com/intel-lab-lkp/linux/commits/Daniel-Lezcano/thermal-core-Fix-double-device-initialization/20260525-231836 patch link: https://lore.kernel.org/all/20260525151609.2826121-2-daniel.lezcano@kernel.org/ patch subject: [PATCH] thermal/core: Fix double device initialization in testcase: boot config: x86_64-rhel-9.4-rust compiler: clang-20 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202605311744.299c79b6-lkp@intel.com [ 0.943552][ T21] ------------[ cut here ]------------ [ 0.945364][ T21] kobject: 'cooling_device0' ((____ptrval____)): is not initialized, yet kobject_get() is being called. [ 0.949812][ T21] WARNING: lib/kobject.c:642 at kobject_get+0x16/0x80, CPU#0: cpuhp/0/21 [ 0.952015][ T21] Modules linked in: [ 0.953029][ T21] CPU: 0 UID: 0 PID: 21 Comm: cpuhp/0 Not tainted 7.1.0-rc4-next-20260522+ #1 PREEMPT(lazy) [ 0.955559][ T21] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 0.958092][ T21] RIP: 0010:kobject_get (kobject.c:640) [ 0.959340][ T21] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 85 ff 74 3a 53 f6 40 3c 01 75 18 48 8d 3d ca c9 26 01 48 8b 30 48 89 c2 48 89 c3 <67> 48 0f b9 3a 48 89 d8 be 01 00 00 00 b9 01 00 00 00 f0 0f c1 48 All code ======== 0: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 7: 00 00 00 00 b: 48 89 f8 mov %rdi,%rax e: 48 85 ff test %rdi,%rdi 11: 74 3a je 0x4d 13: 53 push %rbx 14: f6 40 3c 01 testb $0x1,0x3c(%rax) 18: 75 18 jne 0x32 1a: 48 8d 3d ca c9 26 01 lea 0x126c9ca(%rip),%rdi # 0x126c9eb 21: 48 8b 30 mov (%rax),%rsi 24: 48 89 c2 mov %rax,%rdx 27: 48 89 c3 mov %rax,%rbx 2a:* 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 89 d8 mov %rbx,%rax 32: be 01 00 00 00 mov $0x1,%esi 37: b9 01 00 00 00 mov $0x1,%ecx 3c: f0 lock 3d: 0f .byte 0xf 3e: c1 .byte 0xc1 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 67 48 0f b9 3a ud1 (%edx),%rdi 5: 48 89 d8 mov %rbx,%rax 8: be 01 00 00 00 mov $0x1,%esi d: b9 01 00 00 00 mov $0x1,%ecx 12: f0 lock 13: 0f .byte 0xf 14: c1 .byte 0xc1 15: 48 rex.W [ 0.964083][ T21] RSP: 0000:ffffcbf2000bbd80 EFLAGS: 00010246 [ 0.965592][ T21] RAX: ffff8bdb41ce3018 RBX: ffff8bdb41ce3018 RCX: 0000000000000000 [ 0.967573][ T21] RDX: ffff8bdb41ce3018 RSI: ffff8bdb40aba8e0 RDI: ffffffffbe2b18e0 [ 0.969551][ T21] RBP: 00000000ffffffea R08: 0000000000000000 R09: ffffffffbd0448fd [ 0.971541][ T21] R10: ffff8bdb41ce3001 R11: ffffffffbc95ce40 R12: ffff8bdb41ce3000 [ 0.973500][ T21] R13: ffffffffbd3207d0 R14: ffff8bdb41ce3018 R15: ffff8bdb4180b000 [ 0.975475][ T21] FS: 0000000000000000(0000) GS:ffff8be2a1119000(0000) knlGS:0000000000000000 [ 0.977684][ T21] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.979292][ T21] CR2: ffff8be27ffff000 CR3: 00000001f3220000 CR4: 00000000000406f0 [ 0.981267][ T21] Call Trace: [ 0.982115][ T21] [ 0.982879][ T21] device_add (base/core.c:3798 base/core.c:3578) [ 0.983946][ T21] __thermal_cooling_device_register (thermal/thermal_core.c:1039) [ 0.985496][ T21] acpi_processor_thermal_init (acpi/processor_thermal.c:316) [ 0.986903][ T21] acpi_soft_cpu_online (acpi/processor_driver.c:167) [ 0.988178][ T21] cpuhp_invoke_callback (cpu.c:194) [ 0.989488][ T21] ? smpboot_thread_fn (smpboot.c:?) [ 0.990732][ T21] cpuhp_thread_fun (cpu.c:1109) [ 0.991912][ T21] smpboot_thread_fn (smpboot.c:160) [ 0.993138][ T21] ? smpboot_unregister_percpu_thread (smpboot.c:320) [ 0.994663][ T21] kthread (kthread.c:436) [ 0.995688][ T21] ? kthread_blkcg (kthread.c:1737) [ 0.996817][ T21] ret_from_fork (x86/kernel/process.c:158) [ 0.997947][ T21] ? kthread_blkcg (kthread.c:1737) [ 0.999098][ T21] ret_from_fork_asm (x86/entry/entry_64.S:245) [ 1.000269][ T21] [ 1.001042][ T21] ---[ end trace 0000000000000000 ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260531/202605311744.299c79b6-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki