[norov:smp] [smp] c8a0154d15: BUG_rcuscale(Not_tainted):Objects_remaining_on__kmem_cache_shutdown()

[norov:smp] [smp] c8a0154d15: BUG_rcuscale(Not_tainted):Objects_remaining_on__kmem_cache_shutdown()

[kernel test robot]

Hello,

kernel test robot noticed "BUG_rcuscale(Not_tainted):Objects_remaining_on__kmem_cache_shutdown()" on:

commit: c8a0154d1529978dcda3d5745f0f911432c74f3d ("smp: defer check for local execution in smp_call_function_many_cond()")
https://github.com/norov/linux smp

in testcase: rcutorture
version: 
with following parameters:

	runtime: 300s
	test: default
	torture_type: rcu



config: x86_64-randconfig-123-20250607
compiler: clang-20
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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202506101547.2567d729-lkp@intel.com


[ 409.187362][ T2068] __do_fast_syscall_32 (kbuild/src/consumer/arch/x86/entry/syscall_32.c:?) 
[ 409.189558][ T2068] do_fast_syscall_32 (kbuild/src/consumer/arch/x86/entry/syscall_32.c:331) 
[ 409.190474][ T2068] entry_SYSENTER_compat_after_hwframe (kbuild/src/consumer/arch/x86/entry/entry_64_compat.S:127) 
[  409.191474][ T2068] mem_dump_obj(ffffffffa023ece0): non-paged memory
[  409.268098][ T2068] =============================================================================
[  409.269715][ T2068] BUG rcuscale (Not tainted): Objects remaining on __kmem_cache_shutdown()
[  409.270902][ T2068] -----------------------------------------------------------------------------
[  409.270902][ T2068]
[  409.272995][ T2068] Object 0xffff888121122100 @offset=256
[ 409.274128][ T2068] Allocated in cleanup_module+0x79d/0x1430 [rcutorture] age=27 cpu=0 pid=2068 
[ 409.275331][ T2068] cleanup_module (kbuild/src/consumer/kernel/rcu/rcutorture.c:2577) rcutorture 


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250610/202506101547.2567d729-lkp@intel.com



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