Hello,
kernel test robot noticed "WARNING:at_kernel/workqueue.c:#__queue_delayed_work" on:
commit: 287adf9e9c1fa8a0e2b50ab1a1de3e4572a8ccd2 ("[PATCH v6 2/3] sched: Move task_mm_cid_work to mm delayed work")
url: https://github.com/intel-lab-lkp/linux/commits/Gabriele-Monaco/sched-Compact-RSEQ-concurrency-IDs-with-reduced-threads-and-affinity/20250210-233547
patch link: https://lore.kernel.org/all/20250210153253.460471-3-gmonaco@xxxxxxxxxx/
patch subject: [PATCH v6 2/3] sched: Move task_mm_cid_work to mm delayed work
in testcase: boot
config: x86_64-randconfig-004-20250211
compiler: clang-19
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(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/202502131405.1ba0803f-lkp@xxxxxxxxx
[ 2.640924][ T0] ------------[ cut here ]------------
[ 2.641646][ T0] WARNING: CPU: 0 PID: 0 at kernel/workqueue.c:2495 __queue_delayed_work (kernel/workqueue.c:2495 (discriminator 9))
[ 2.642874][ T0] Modules linked in:
[ 2.643381][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.14.0-rc2-00002-g287adf9e9c1f #1
[ 2.644582][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 2.645943][ T0] RIP: 0010:__queue_delayed_work (kernel/workqueue.c:2495 (discriminator 9))
[ 2.646755][ T0] Code: 44 89 fe 4c 89 33 e8 6d 24 19 00 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d 31 c0 31 c9 31 ff 31 d2 31 f6 c3 e8 7f 87 25 00 90 <0f> 0b 90 e9 58 fd ff ff e8 71 87 25 00 90 0f 0b 90 e9 80 fd ff ff
All code
========
0: 44 89 fe mov %r15d,%esi
3: 4c 89 33 mov %r14,(%rbx)
6: e8 6d 24 19 00 call 0x192478
b: 48 83 c4 08 add $0x8,%rsp
f: 5b pop %rbx
10: 41 5c pop %r12
12: 41 5d pop %r13
14: 41 5e pop %r14
16: 41 5f pop %r15
18: 5d pop %rbp
19: 31 c0 xor %eax,%eax
1b: 31 c9 xor %ecx,%ecx
1d: 31 ff xor %edi,%edi
1f: 31 d2 xor %edx,%edx
21: 31 f6 xor %esi,%esi
23: c3 ret
24: e8 7f 87 25 00 call 0x2587a8
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: e9 58 fd ff ff jmp 0xfffffffffffffd8a
32: e8 71 87 25 00 call 0x2587a8
37: 90 nop
38: 0f 0b ud2
3a: 90 nop
3b: e9 80 fd ff ff jmp 0xfffffffffffffdc0
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 90 nop
3: e9 58 fd ff ff jmp 0xfffffffffffffd60
8: e8 71 87 25 00 call 0x25877e
d: 90 nop
e: 0f 0b ud2
10: 90 nop
11: e9 80 fd ff ff jmp 0xfffffffffffffd96
[ 2.649301][ T0] RSP: 0000:ffffffffab007d80 EFLAGS: 00010046
[ 2.650081][ T0] RAX: 0000000000000000 RBX: ffff888100090b98 RCX: 0000000000000000
[ 2.651084][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 2.652078][ T0] RBP: ffffffffab007db0 R08: 0000000000000000 R09: 0000000000000000
[ 2.653077][ T0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 2.654101][ T0] R13: 0000000000000040 R14: 0000000000000019 R15: 0000000000000040
[ 2.655112][ T0] FS: 0000000000000000(0000) GS:ffff8883af200000(0000) knlGS:0000000000000000
[ 2.656263][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.657103][ T0] CR2: ffff88843ffff000 CR3: 00000001d3617000 CR4: 00000000000000b0
[ 2.658128][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2.659147][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 2.660143][ T0] Call Trace:
[ 2.660553][ T0] <TASK>
[ 2.660934][ T0] ? show_regs (arch/x86/kernel/dumpstack.c:479)
[ 2.661524][ T0] ? __warn (kernel/panic.c:748)
[ 2.662065][ T0] ? __queue_delayed_work (kernel/workqueue.c:2495 (discriminator 9))
[ 2.662796][ T0] ? __queue_delayed_work (kernel/workqueue.c:2495 (discriminator 9))
[ 2.663535][ T0] ? report_bug (lib/bug.c:?)
[ 2.664119][ T0] ? __queue_delayed_work (kernel/workqueue.c:2495 (discriminator 9))
[ 2.664836][ T0] ? handle_bug (arch/x86/kernel/traps.c:285)
[ 2.665404][ T0] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[ 2.665848][ T0] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)
[ 2.666292][ T0] ? __queue_delayed_work (kernel/workqueue.c:2495 (discriminator 9))
[ 2.666762][ T0] queue_delayed_work_on (kernel/workqueue.c:?)
[ 2.667215][ T0] mm_init (include/linux/workqueue.h:? include/linux/workqueue.h:817 include/linux/mm_types.h:1261 kernel/fork.c:1310)
[ 2.667575][ T0] mm_alloc (kernel/fork.c:?)
[ 2.667916][ T0] ? x86_64_start_reservations (usercopy_64.c:?)
[ 2.668400][ T0] poking_init (arch/x86/mm/init.c:822)
[ 2.668777][ T0] ? x86_64_start_reservations (usercopy_64.c:?)
[ 2.669266][ T0] start_kernel (init/main.c:959)
[ 2.669671][ T0] x86_64_start_reservations (usercopy_64.c:?)
[ 2.670140][ T0] x86_64_start_kernel (arch/x86/kernel/head64.c:445 (discriminator 2))
[ 2.670574][ T0] common_startup_64 (arch/x86/kernel/head_64.S:421)
[ 2.671018][ T0] </TASK>
[ 2.671271][ T0] irq event stamp: 0
[ 2.671595][ T0] hardirqs last enabled at (0): 0x0
[ 2.672192][ T0] hardirqs last disabled at (0): 0x0
[ 2.672789][ T0] softirqs last enabled at (0): 0x0
[ 2.673386][ T0] softirqs last disabled at (0): 0x0
[ 2.674005][ T0] ---[ end trace 0000000000000000 ]---
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250213/202502131405.1ba0803f-lkp@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
