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@xxxxxxxxx
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 <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202407141846.665c0446-lkp@xxxxxxxxx
[ 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 <c3> 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@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
