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 EFNClwBp bdgYDVNbJ6gPzSCDKXHyz0GJDHp6mLjYb09DLov4VPVml4Ek= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, kernel test robot noticed "WARNING:at_mm/page_counter.c:#page_counter_cancel" on: commit: 314315f97034a4235a92c49d8d250273064a0b04 ("memcg: multi-memcg percpu charge cache - fix 2") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: boot config: i386-randconfig-054-20250505 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) +------------------------------------------------------------------+------------+------------+ | | 706e1bbb16 | 314315f970 | +------------------------------------------------------------------+------------+------------+ | WARNING:at_mm/page_counter.c:#page_counter_cancel | 0 | 6 | | EIP:page_counter_cancel | 0 | 6 | +------------------------------------------------------------------+------------+------------+ 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/202505071038.5b0f43cd-lkp@intel.com [ 12.841558][ T1] ------------[ cut here ]------------ [ 12.842138][ T1] page_counter underflow: -191 nr_pages=255 [ 12.842688][ T1] WARNING: CPU: 0 PID: 1 at mm/page_counter.c:61 page_counter_cancel (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/page_counter.c:60) [ 12.843497][ T1] Modules linked in: autofs4 [ 12.843977][ T1] CPU: 0 UID: 0 PID: 1 Comm: systemd Tainted: G T 6.15.0-rc2-00483-g314315f97034 #1 PREEMPT(undef) [ 12.845080][ T1] Tainted: [T]=RANDSTRUCT [ 12.849671][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 12.850748][ T1] EIP: page_counter_cancel (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/page_counter.c:60) [ 12.851328][ T1] Code: c2 01 74 0c 85 c9 78 24 80 78 28 01 74 2c eb 68 c6 05 6a d4 e3 c2 01 52 51 68 1a 52 75 c2 89 c6 e8 37 9c d4 ff 89 f0 83 c4 0c <0f> 0b c7 00 00 00 00 00 31 c9 80 78 28 01 75 3e 83 78 3c 00 74 38 All code ======== 0: c2 01 74 ret $0x7401 3: 0c 85 or $0x85,%al 5: c9 leave 6: 78 24 js 0x2c 8: 80 78 28 01 cmpb $0x1,0x28(%rax) c: 74 2c je 0x3a e: eb 68 jmp 0x78 10: c6 05 6a d4 e3 c2 01 movb $0x1,-0x3d1c2b96(%rip) # 0xffffffffc2e3d481 17: 52 push %rdx 18: 51 push %rcx 19: 68 1a 52 75 c2 push $0xffffffffc275521a 1e: 89 c6 mov %eax,%esi 20: e8 37 9c d4 ff call 0xffffffffffd49c5c 25: 89 f0 mov %esi,%eax 27: 83 c4 0c add $0xc,%esp 2a:* 0f 0b ud2 <-- trapping instruction 2c: c7 00 00 00 00 00 movl $0x0,(%rax) 32: 31 c9 xor %ecx,%ecx 34: 80 78 28 01 cmpb $0x1,0x28(%rax) 38: 75 3e jne 0x78 3a: 83 78 3c 00 cmpl $0x0,0x3c(%rax) 3e: 74 38 je 0x78 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: c7 00 00 00 00 00 movl $0x0,(%rax) 8: 31 c9 xor %ecx,%ecx a: 80 78 28 01 cmpb $0x1,0x28(%rax) e: 75 3e jne 0x4e 10: 83 78 3c 00 cmpl $0x0,0x3c(%rax) 14: 74 38 je 0x4e [ 12.853232][ T1] EAX: eb6cd0b0 EBX: c2d13838 ECX: 00000000 EDX: 00000000 [ 12.853946][ T1] ESI: eb6cd0b0 EDI: eb6cd0b0 EBP: c3973dac ESP: c3973da8 [ 12.854647][ T1] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00210092 [ 12.855440][ T1] CR0: 80050033 CR2: b7e1eb80 CR3: 2b908000 CR4: 00040690 [ 12.856143][ T1] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 12.856867][ T1] DR6: fffe0ff0 DR7: 00000400 [ 12.857404][ T1] Call Trace: [ 12.857816][ T1] page_counter_uncharge (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/page_counter.c:183) [ 12.858419][ T1] drain_stock (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/memcontrol.c:1868) [ 12.858872][ T1] refill_stock (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/memcontrol.c:1958) [ 12.859323][ T1] obj_cgroup_uncharge_pages (kbuild/obj/consumer/i386-randconfig-054-20250505/include/linux/cgroup_refcnt.h:78 kbuild/obj/consumer/i386-randconfig-054-20250505/mm/memcontrol.c:2743) [ 12.859837][ T1] refill_obj_stock (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/memcontrol.c:?) [ 12.860313][ T1] __memcg_slab_free_hook (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/memcontrol.c:3169) [ 12.860829][ T1] kmem_cache_free (kbuild/obj/consumer/i386-randconfig-054-20250505/mm/slub.c:?) [ 12.861305][ T1] ? seq_release (kbuild/obj/consumer/i386-randconfig-054-20250505/fs/seq_file.c:357) [ 12.861752][ T1] seq_release (kbuild/obj/consumer/i386-randconfig-054-20250505/fs/seq_file.c:357) [ 12.862225][ T1] kernfs_fop_release (kbuild/obj/consumer/i386-randconfig-054-20250505/fs/kernfs/file.c:767) [ 12.862777][ T1] __fput (kbuild/obj/consumer/i386-randconfig-054-20250505/fs/file_table.c:466) [ 12.863259][ T1] fput_close_sync (kbuild/obj/consumer/i386-randconfig-054-20250505/fs/file_table.c:571) [ 12.863792][ T1] __ia32_sys_close (kbuild/obj/consumer/i386-randconfig-054-20250505/fs/open.c:?) [ 12.864347][ T1] ia32_sys_call (kbuild/obj/consumer/i386-randconfig-054-20250505/./arch/x86/include/generated/asm/syscalls_32.h:9) [ 12.864927][ T1] __do_fast_syscall_32 (kbuild/obj/consumer/i386-randconfig-054-20250505/arch/x86/entry/syscall_32.c:?) [ 12.865539][ T1] ? up_read (kbuild/obj/consumer/i386-randconfig-054-20250505/kernel/locking/rwsem.c:1621) [ 12.866048][ T1] ? irqentry_exit_to_user_mode (kbuild/obj/consumer/i386-randconfig-054-20250505/kernel/entry/common.c:234) [ 12.866692][ T1] do_fast_syscall_32 (kbuild/obj/consumer/i386-randconfig-054-20250505/arch/x86/entry/syscall_32.c:331) [ 12.867263][ T1] do_SYSENTER_32 (kbuild/obj/consumer/i386-randconfig-054-20250505/arch/x86/entry/syscall_32.c:369) [ 12.867774][ T1] entry_SYSENTER_32 (kbuild/obj/consumer/i386-randconfig-054-20250505/arch/x86/entry/entry_32.S:836) [ 12.868328][ T1] EIP: 0xb7f9a539 [ 12.868770][ T1] Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 58 b8 77 00 00 00 cd 80 90 90 90 All code ======== 0: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 4: 10 07 adc %al,(%rdi) 6: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi a: 10 08 adc %cl,(%rax) c: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi ... 20: 00 51 52 add %dl,0x52(%rcx) 23:* 55 push %rbp <-- trapping instruction 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 2a: 5d pop %rbp 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 ret 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 90 nop 33: 90 nop 34: 90 nop 35: 58 pop %rax 36: b8 77 00 00 00 mov $0x77,%eax 3b: cd 80 int $0x80 3d: 90 nop 3e: 90 nop 3f: 90 nop Code starting with the faulting instruction =========================================== 0: 5d pop %rbp 1: 5a pop %rdx 2: 59 pop %rcx 3: c3 ret 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 58 pop %rax c: b8 77 00 00 00 mov $0x77,%eax 11: cd 80 int $0x80 13: 90 nop 14: 90 nop 15: 90 nop The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250507/202505071038.5b0f43cd-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki