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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: hi, Lai Jiangshan, we noticed this commit is a fix for our report [1], and we really observed the issue in [1] is fixed as below (a) fbb3d4c15dc0fe8a 19af457573838785290d27dd09a ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :6 100% 6:6 dmesg.EIP:lockdep_assert_cpus_held :6 100% 6:6 dmesg.WARNING:at_kernel/cpu.c:#lockdep_assert_cpus_held 6:6 -100% :6 dmesg.WARNING:possible_recursive_locking_detected <---- (a) however, now we noticed a WARNING:at_kernel/cpu.c:#lockdep_assert_cpus_held. not sure if it could supply a hint for some other problems? [1] http://lkml.kernel.org/r/202407081521.83b627c1-lkp@intel.com Hello, kernel test robot noticed "WARNING:at_kernel/cpu.c:#lockdep_assert_cpus_held" on: commit: 19af457573838785290d27dd09a59140f541d1d8 ("workqueue: Remove cpus_read_lock() from apply_wqattrs_lock()") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master [test failed on linux-next/master 3fe121b622825ff8cc995a1e6b026181c48188db] in testcase: rcutorture version: with following parameters: runtime: 300s test: default torture_type: trivial compiler: clang-18 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (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/202407141846.665c0446-lkp@intel.com [ 15.726567][ T131] ------------[ cut here ]------------ [ 15.728117][ T131] WARNING: CPU: 1 PID: 131 at kernel/cpu.c:525 lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.731191][ T131] Modules linked in: floppy(+) parport_pc(+) parport qemu_fw_cfg rtc_cmos [ 15.733423][ T131] CPU: 1 PID: 131 Comm: systemd-udevd Tainted: G T 6.10.0-rc2-00254-g19af45757383 #1 df6f039f42e8818bf9a534449362ebad1aad32e2 [ 15.737011][ T131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 15.739760][ T131] EIP: lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.741326][ T131] Code: 97 c2 03 72 20 83 3d f4 73 97 c2 00 74 17 55 89 e5 b8 fc bd 4d c2 ba ff ff ff ff e8 e4 57 d1 00 85 c0 74 06 5d 31 c0 31 d2 c3 <0f> 0b eb f6 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 89 e5 b8 All code ======== 0: 97 xchg %eax,%edi 1: c2 03 72 ret $0x7203 4: 20 83 3d f4 73 97 and %al,-0x688c0bc3(%rbx) a: c2 00 74 ret $0x7400 d: 17 (bad) e: 55 push %rbp f: 89 e5 mov %esp,%ebp 11: b8 fc bd 4d c2 mov $0xc24dbdfc,%eax 16: ba ff ff ff ff mov $0xffffffff,%edx 1b: e8 e4 57 d1 00 call 0xd15804 20: 85 c0 test %eax,%eax 22: 74 06 je 0x2a 24: 5d pop %rbp 25: 31 c0 xor %eax,%eax 27: 31 d2 xor %edx,%edx 29: c3 ret 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb f6 jmp 0x24 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 90 nop 33: 90 nop 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 55 push %rbp 3d: 89 e5 mov %esp,%ebp 3f: b8 .byte 0xb8 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb f6 jmp 0xfffffffffffffffa 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 55 push %rbp 13: 89 e5 mov %esp,%ebp 15: b8 .byte 0xb8 [ 15.745390][ T131] EAX: 00000000 EBX: c376d200 ECX: 00000000 EDX: 00000000 [ 15.746576][ T131] ESI: c4de9180 EDI: 00020002 EBP: ecf3bb10 ESP: ecf3bb10 [ 15.747773][ T131] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00210246 [ 15.749161][ T131] CR0: 80050033 CR2: 00a9c93c CR3: 2cf6c000 CR4: 00040690 [ 15.750384][ T131] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 15.751570][ T131] DR6: fffe0ff0 DR7: 00000400 [ 15.752427][ T131] Call Trace: [ 15.753063][ T131] ? show_regs (arch/x86/kernel/dumpstack.c:478) [ 15.753830][ T131] ? lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.754779][ T131] ? __warn (kernel/panic.c:239 kernel/panic.c:693) [ 15.755533][ T131] ? lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.756503][ T131] ? lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.757508][ T131] ? report_bug (lib/bug.c:199) [ 15.758300][ T131] ? exc_overflow (arch/x86/kernel/traps.c:252) [ 15.759113][ T131] ? handle_bug (arch/x86/kernel/traps.c:?) [ 15.763110][ T131] ? exc_invalid_op (arch/x86/kernel/traps.c:260) [ 15.763989][ T131] ? handle_exception (arch/x86/entry/entry_32.S:1047) [ 15.764913][ T131] ? exc_overflow (arch/x86/kernel/traps.c:252) [ 15.765754][ T131] ? lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.766706][ T131] ? exc_overflow (arch/x86/kernel/traps.c:252) [ 15.767516][ T131] ? lockdep_assert_cpus_held (kernel/cpu.c:525) [ 15.768498][ T131] alloc_workqueue (kernel/workqueue.c:5430) [ 15.769398][ T131] do_floppy_init (??:?) floppy [ 15.770976][ T131] init_module (??:?) floppy [ 15.772499][ T131] do_one_initcall (init/main.c:1267) [ 15.773357][ T131] ? 0xef561000 [ 15.774006][ T131] ? lock_acquire (kernel/locking/lockdep.c:5754) [ 15.774790][ T131] ? kill_kprobe (include/linux/rcupdate.h:328) [ 15.775617][ T131] ? try_to_wake_up (kernel/sched/core.c:2255) [ 15.776509][ T131] ? radix_tree_iter_tag_clear (lib/radix-tree.c:1063) [ 15.777501][ T131] ? rcu_lock_acquire (include/linux/rcupdate.h:338) [ 15.778326][ T131] ? rcu_lock_release (include/linux/rcupdate.h:340) [ 15.779215][ T131] ? __lock_acquire (kernel/locking/lockdep.c:4599) [ 15.780074][ T131] ? __kernel_text_address (kernel/extable.c:79) [ 15.781064][ T131] ? stack_trace_snprint (kernel/stacktrace.c:?) [ 15.781969][ T131] ? stack_depot_save_flags (lib/stackdepot.c:609) [ 15.782876][ T131] ? stack_trace_save (kernel/stacktrace.c:122) [ 15.783739][ T131] ? lock_acquire (kernel/locking/lockdep.c:5754) [ 15.784548][ T131] ? kmalloc_trace_noprof (include/linux/sched/mm.h:335 mm/slub.c:3890 mm/slub.c:3980 mm/slub.c:4147) [ 15.785452][ T131] ? __might_sleep (kernel/sched/core.c:10126) [ 15.786219][ T131] ? kmalloc_trace_noprof (include/trace/events/kmem.h:54) [ 15.787105][ T131] ? do_init_module (kernel/module/main.c:2530) [ 15.787949][ T131] do_init_module (kernel/module/main.c:2541) [ 15.789008][ T131] load_module (kernel/module/main.c:3006) [ 15.790187][ T131] __ia32_sys_finit_module (kernel/module/main.c:3173 kernel/module/main.c:3191 kernel/module/main.c:3211 kernel/module/main.c:3194 kernel/module/main.c:3194) [ 15.791578][ T131] ia32_sys_call (kbuild/obj/consumer/i386-randconfig-003-20240712/./arch/x86/include/generated/asm/syscalls_32.h:?) [ 15.792834][ T131] do_int80_syscall_32 (arch/x86/entry/common.c:?) [ 15.794066][ T131] ? exc_page_fault (arch/x86/mm/fault.c:1543) [ 15.795255][ T131] entry_INT80_32 (arch/x86/entry/entry_32.S:944) [ 15.796583][ T131] EIP: 0xb7f60092 [ 15.797596][ T131] Code: 00 00 00 e9 90 ff ff ff ff a3 24 00 00 00 68 30 00 00 00 e9 80 ff ff ff ff a3 f8 ff ff ff 66 90 00 00 00 00 00 00 00 00 cd 80 8d b4 26 00 00 00 00 8d b6 00 00 00 00 8b 1c 24 c3 8d b4 26 00 All code ======== 0: 00 00 add %al,(%rax) 2: 00 e9 add %ch,%cl 4: 90 nop 5: ff (bad) 6: ff (bad) 7: ff (bad) 8: ff a3 24 00 00 00 jmp *0x24(%rbx) e: 68 30 00 00 00 push $0x30 13: e9 80 ff ff ff jmp 0xffffffffffffff98 18: ff a3 f8 ff ff ff jmp *-0x8(%rbx) 1e: 66 90 xchg %ax,%ax ... 28: cd 80 int $0x80 2a:* c3 ret <-- trapping instruction 2b: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 32: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi 38: 8b 1c 24 mov (%rsp),%ebx 3b: c3 ret 3c: 8d .byte 0x8d 3d: b4 26 mov $0x26,%ah ... Code starting with the faulting instruction =========================================== 0: c3 ret 1: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 8: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi e: 8b 1c 24 mov (%rsp),%ebx 11: c3 ret 12: 8d .byte 0x8d 13: b4 26 mov $0x26,%ah The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240714/202407141846.665c0446-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki