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X-OriginatorOrg: intel.com 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 | 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 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