[gourryinverse:scratch/gourry/managed_nodes/rfc5] [mm] 5719619cfd: Oops:divide_error:#[##]

[gourryinverse:scratch/gourry/managed_nodes/rfc5] [mm] 5719619cfd: Oops:divide_error:#[##]

[kernel test robot]

Hello,

kernel test robot noticed "Oops:divide_error:#[##]" on:

commit: 5719619cfde5ab0de3c5e23d5148d16f8e099b95 ("mm: add NODE_PRIVATE_CAP_RECLAIM for opted-in private node reclaim")
https://github.com/gourryinverse/linux scratch/gourry/managed_nodes/rfc5

in testcase: boot

config: i386-randconfig-015-20260625
compiler: clang-22
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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202606261549.2de78c5b-lkp@intel.com



[    0.382314][    T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.385543][    T1] futex hash table entries: 256 (15360 bytes on 1 NUMA nodes, total 15 KiB, linear).
[    0.388779][    T1] xor: automatically using best checksumming function   avx
[    0.392592][    T1] regulator-dummy: 2147483647 mW budget, enabled
[    0.395918][    T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[    0.404973][    T1] Oops: divide error: 0000 [#1]
[    0.406138][    T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G                T   7.1.0-rc5-00530-g5719619cfde5 #1 PREEMPT(full)  450d841d236e32aa9c517c2f2614cf10e667100e
[    0.406138][    T1] Tainted: [T]=RANDSTRUCT
[    0.406138][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[    0.406138][    T1] EIP: setup_per_zone_wmarks (kbuild/src/mm/page_alloc.c:6586 (discriminator 256) kbuild/src/mm/page_alloc.c:6649 (discriminator 256))
[    0.406138][    T1] Code: 01 00 00 89 c6 c1 7d f0 02 90 90 90 90 8d be e8 01 00 00 89 f8 e8 a3 04 c9 01 89 c3 8d 4e 44 f6 c1 03 75 67 8b 01 0f af 45 f0 <f7> 35 94 23 44 cc 8b 56 44 81 fa 00 84 00 00 89 d0 73 05 b8 ff 83
All code
========
   0:	01 00                	add    %eax,(%rax)
   2:	00 89 c6 c1 7d f0    	add    %cl,-0xf823e3a(%rcx)
   8:	02 90 90 90 90 8d    	add    -0x726f6f70(%rax),%dl
   e:	be e8 01 00 00       	mov    $0x1e8,%esi
  13:	89 f8                	mov    %edi,%eax
  15:	e8 a3 04 c9 01       	call   0x1c904bd
  1a:	89 c3                	mov    %eax,%ebx
  1c:	8d 4e 44             	lea    0x44(%rsi),%ecx
  1f:	f6 c1 03             	test   $0x3,%cl
  22:	75 67                	jne    0x8b
  24:	8b 01                	mov    (%rcx),%eax
  26:	0f af 45 f0          	imul   -0x10(%rbp),%eax
  2a:*	f7 35 94 23 44 cc    	divl   -0x33bbdc6c(%rip)        # 0xffffffffcc4423c4		<-- trapping instruction
  30:	8b 56 44             	mov    0x44(%rsi),%edx
  33:	81 fa 00 84 00 00    	cmp    $0x8400,%edx
  39:	89 d0                	mov    %edx,%eax
  3b:	73 05                	jae    0x42
  3d:	b8                   	.byte 0xb8
  3e:	ff                   	.byte 0xff
  3f:	83                   	.byte 0x83

Code starting with the faulting instruction
===========================================
   0:	f7 35 94 23 44 cc    	divl   -0x33bbdc6c(%rip)        # 0xffffffffcc44239a
   6:	8b 56 44             	mov    0x44(%rsi),%edx
   9:	81 fa 00 84 00 00    	cmp    $0x8400,%edx
   f:	89 d0                	mov    %edx,%eax
  11:	73 05                	jae    0x18
  13:	b8                   	.byte 0xb8
  14:	ff                   	.byte 0xff
  15:	83                   	.byte 0x83
[    0.406138][    T1] EAX: 08b919c8 EBX: 00000207 ECX: ccfe6c24 EDX: cc791333
[    0.406138][    T1] ESI: ccfe6be0 EDI: ccfe6dc8 EBP: c05b9c4c ESP: c05b9c38
[    0.406138][    T1] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010002
[    0.406138][    T1] CR0: 80050033 CR2: ffdd9000 CR3: 0d2c9000 CR4: 00040690
[    0.406138][    T1] Call Trace:
[    0.406138][    T1]  init_per_zone_wmark_min (kbuild/src/mm/page_alloc.c:6703)
[    0.406138][    T1]  do_one_initcall (kbuild/src/init/main.c:1392)
[    0.406138][    T1]  ? __dequeue_entity (kbuild/src/include/linux/rbtree_augmented.h:339 kbuild/src/kernel/sched/fair.c:1051)
[    0.406138][    T1]  ? kvm_sched_clock_read (kbuild/src/arch/x86/kernel/kvmclock.c:92 (discriminator 1))
[    0.406138][    T1]  ? sched_clock_noinstr (kbuild/src/arch/x86/kernel/tsc.c:274)


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260626/202606261549.2de78c5b-lkp@intel.com



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