[linux-next:master] [workqueue] 21c05ca88a: RIP:__alloc_workqueue

[linux-next:master] [workqueue] 21c05ca88a: RIP:__alloc_workqueue

[kernel test robot]

Hello,

kernel test robot noticed "RIP:__alloc_workqueue" on:

commit: 21c05ca88a548ca1353cbef189c97d4f03b90692 ("workqueue: Add warnings and ensure one among WQ_PERCPU or WQ_UNBOUND is present")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master 7da7f07112610a520567421dd2ffcb51beaefbcc]

in testcase: xfstests
version: xfstests-x86_64-cac9fe2b-1_20260518
with following parameters:

	disk: 4HDD
	fs: btrfs
	test: generic-169



config: x86_64-rhel-9.4-func
compiler: gcc-14
test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (Skylake) with 28G memory

(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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202606021026.6d6acabf-lkp@intel.com


[    3.050774][    T1] ------------[ cut here ]------------
[    3.064584][    T1] workqueue: thermal_events is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
[    3.074470][    T1] WARNING: kernel/workqueue.c:5837 at __alloc_workqueue+0x9cf/0xcb0, CPU#3: swapper/0/1
[    3.084471][    T1] Modules linked in:
[    3.087449][    T1] CPU: 3 UID: 0 PID: 1 Comm: swapper/0 Tainted: G S                  7.1.0-rc2+ #1 PREEMPT(lazy)
[    3.098472][    T1] Tainted: [S]=CPU_OUT_OF_SPEC
[    3.103448][    T1] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.2.8 01/26/2016
[    3.111467][    T1] RIP: 0010:__alloc_workqueue (workqueue.c:5837 (discriminator 1))
[    3.117449][    T1] Code: 31 ed e9 bc fd ff ff 80 3d d3 b1 24 05 00 0f 84 e5 9c c6 ff f7 c3 02 01 00 00 0f 85 bd f6 ff ff 48 8d 3d 21 e1 2b 05 4c 89 fe <67> 48 0f b9 3a 80 cf 01 e9 a6 f6 ff ff 41 be 08 00 00 00 41 bd 00
All code
========
   0:	31 ed                	xor    %ebp,%ebp
   2:	e9 bc fd ff ff       	jmp    0xfffffffffffffdc3
   7:	80 3d d3 b1 24 05 00 	cmpb   $0x0,0x524b1d3(%rip)        # 0x524b1e1
   e:	0f 84 e5 9c c6 ff    	je     0xffffffffffc69cf9
  14:	f7 c3 02 01 00 00    	test   $0x102,%ebx
  1a:	0f 85 bd f6 ff ff    	jne    0xfffffffffffff6dd
  20:	48 8d 3d 21 e1 2b 05 	lea    0x52be121(%rip),%rdi        # 0x52be148
  27:	4c 89 fe             	mov    %r15,%rsi
  2a:*	67 48 0f b9 3a       	ud1    (%edx),%rdi		<-- trapping instruction
  2f:	80 cf 01             	or     $0x1,%bh
  32:	e9 a6 f6 ff ff       	jmp    0xfffffffffffff6dd
  37:	41 be 08 00 00 00    	mov    $0x8,%r14d
  3d:	41                   	rex.B
  3e:	bd                   	.byte 0xbd
	...

Code starting with the faulting instruction
===========================================
   0:	67 48 0f b9 3a       	ud1    (%edx),%rdi
   5:	80 cf 01             	or     $0x1,%bh
   8:	e9 a6 f6 ff ff       	jmp    0xfffffffffffff6b3
   d:	41 be 08 00 00 00    	mov    $0x8,%r14d
  13:	41                   	rex.B
  14:	bd                   	.byte 0xbd
	...
[    3.136504][    T1] RSP: 0000:ffffc9000002fb00 EFLAGS: 00010246
[    3.142449][    T1] RAX: 000000000000000e RBX: 0000000000000080 RCX: 1ffff92000005f4c
[    3.150468][    T1] RDX: 0000000000000006 RSI: ffff88810df4ecb8 RDI: ffffffff8686adc0
[    3.158466][    T1] RBP: ffff88810df4ec00 R08: ffffffff84c3942e R09: ffffc9000002fb88
[    3.166466][    T1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[    3.174467][    T1] R13: ffffffff84c39420 R14: ffffc9000002fb88 R15: ffff88810df4ecb8
[    3.182467][    T1] FS:  0000000000000000(0000) GS:ffff88868c84b000(0000) knlGS:0000000000000000
[    3.191469][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.197451][    T1] CR2: 0000000000000000 CR3: 0000000756870001 CR4: 00000000003706f0
[    3.205467][    T1] Call Trace:
[    3.208444][    T1]  <TASK>
[    3.211443][    T1]  ? __pfx_mutex_unlock (x86/include/asm/atomic64_64.h:15)
[    3.216448][    T1]  ? __pfx_mutex_lock (locking/mutex.c:1114 (discriminator 1))
[    3.221448][    T1]  alloc_workqueue_noprof (workqueue.c:5932 workqueue.c:5948)
[    3.226448][    T1]  ? __pfx_alloc_workqueue_noprof (workqueue.c:5671 (discriminator 1))
[    3.232449][    T1]  ? __pfx_genl_register_family (netlink/genetlink.c:548 (discriminator 1))
[    3.238450][    T1]  ? add_device_randomness (linux/spinlock.h:408 char/random.c:936)
[    3.243447][    T1]  ? __pfx_thermal_init (usercopy_64.c:?)
[    3.248447][    T1]  thermal_init (thermal/thermal_core.c:1892 (discriminator 2))
[    3.252447][    T1]  ? __pfx_thermal_init (usercopy_64.c:?)
[    3.257447][    T1]  do_one_initcall (main.c:1392)
[    3.262447][    T1]  ? __pfx_do_one_initcall (trace/events/initcall.h:10)
[    3.267448][    T1]  ? parse_one (params.c:132)
[    3.271446][    T1]  ? kasan_save_track (kasan/common.c:78)
[    3.276447][    T1]  ? __kasan_kmalloc (kasan/common.c:398 kasan/common.c:415)
[    3.281447][    T1]  ? __kmalloc_noprof (linux/kasan.h:263 slub.c:5295 slub.c:5307)
[    3.286447][    T1]  do_initcalls (main.c:1454 (discriminator 1) main.c:1470 (discriminator 1))
[    3.290447][    T1]  kernel_init_freeable (main.c:1490 main.c:1703)
[    3.295448][    T1]  ? __pfx_kernel_init_freeable (main.c:1671)
[    3.301449][    T1]  ? __pfx_schedule_timeout (??:?)
[    3.306449][    T1]  ? __pfx__raw_spin_lock_irq (locking/spinlock.c:183)
[    3.312448][    T1]  ? __pfx_kernel_init (main.c:762)
[    3.317447][    T1]  ? __pfx_kernel_init (main.c:762)
[    3.322447][    T1]  kernel_init (main.c:1593)
[    3.326446][    T1]  ? __pfx_kernel_init (main.c:762)
[    3.331447][    T1]  ret_from_fork (x86/kernel/process.c:158)
[    3.335447][    T1]  ? __pfx_ret_from_fork (x86/include/asm/entry-common.h:54)
[    3.340448][    T1]  ? switch_fpu (linux/instrumented.h:82 asm-generic/bitops/instrumented-non-atomic.h:141 linux/thread_info.h:133 linux/sched.h:2066 x86/include/asm/fpu/sched.h:34)
[    3.345447][    T1]  ? __switch_to (x86/kernel/process_64.c:403 x86/kernel/process_64.c:663)
[    3.349446][    T1]  ? __switch_to_asm (x86/entry/entry_64.S:206)
[    3.354447][    T1]  ? __pfx_kernel_init (main.c:762)
[    3.359448][    T1]  ret_from_fork_asm (x86/entry/entry_64.S:245)
[    3.364448][    T1]  </TASK>
[    3.367466][    T1] ---[ end trace 0000000000000000 ]---


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260602/202606021026.6d6acabf-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki