Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: c7b2a6d1affb732cdb37677f31cc8c2499fbf57c ("[PATCHv2 1/2] x86/mm: Fix boot with some memory above MAXMEM")
url: https://github.com/0day-ci/linux/commits/Kirill-A-Shutemov/x86-Fix-boot-with-some-memory-above-MAXMEM/20200608-205827


in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+---------------------------------------------------------+----------+------------+
|                                                         | v5.7-rc7 | c7b2a6d1af |
+---------------------------------------------------------+----------+------------+
| boot_successes                                          | 35       | 0          |
| boot_failures                                           | 3        | 12         |
| BUG:unable_to_handle_page_fault_for_address             | 1        |            |
| Oops:#[##]                                              | 1        |            |
| invoked_oom-killer:gfp_mask=0x                          | 2        |            |
| Mem-Info                                                | 2        |            |
| Out_of_memory_and_no_killable_processes                 | 2        |            |
| Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 2        |            |
| kernel_BUG_at_arch/x86/mm/physaddr.c                    | 0        | 12         |
| invalid_opcode:#[##]                                    | 0        | 12         |
| EIP:__phys_addr                                         | 0        | 12         |
| Kernel_panic-not_syncing:Fatal_exception                | 0        | 12         |
+---------------------------------------------------------+----------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@intel.com>


[    0.270304] kernel BUG at arch/x86/mm/physaddr.c:81!
[    0.271167] invalid opcode: 0000 [#1] SMP
[    0.271930] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc7-00001-gc7b2a6d1affb7 #1
[    0.273438] EIP: __phys_addr+0x77/0x170
[    0.274191] Code: d4 ff cf b4 00 e8 c9 69 00 00 83 05 e8 ff cf b4 01 83 15 ec ff cf b4 00 39 f0 74 3d 83 05 f0 ff cf b4 01 83 15 f4 ff cf b4 00 <0f> 0b 83 05 f8 ff cf b4 01 83 15 fc ff cf b4 00 83 05 00 00 d0 b4
[    0.277762] EAX: 00000fff EBX: f73fdfff ECX: fffff000 EDX: 00000001
[    0.279012] ESI: 473fdfff EDI: 00000000 EBP: b44fde34 ESP: b44fde2c
[    0.280216] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210246
[    0.281576] CR0: 80050033 CR2: ffffffff CR3: 04cc2000 CR4: 00040690
[    0.282634] Call Trace:
[    0.283117]  memtype_kernel_map_sync+0x2e/0x130
[    0.283995]  ? __get_vm_area_node+0x13a/0x230
[    0.284939]  ? get_vm_area_caller+0x58/0x70
[    0.285757]  __ioremap_caller+0x2ea/0x510
[    0.286734]  ? walk_system_ram_range+0xb5/0x110
[    0.287599]  ioremap_cache+0x2f/0x40
[    0.288288]  ? acpi_os_map_iomem+0x34d/0x3c0
[    0.289103]  acpi_os_map_iomem+0x34d/0x3c0
[    0.289888]  acpi_os_map_memory+0x16/0x30
[    0.290704]  acpi_tb_acquire_table+0x4b/0x96
[    0.291571]  acpi_tb_validate_table+0x61/0xb9
[    0.292482]  acpi_tb_validate_temp_table+0x48/0x58
[    0.293464]  acpi_tb_verify_temp_table+0x49/0x4e1
[    0.294272]  ? acpi_ut_acquire_mutex+0x1d8/0x2d9
[    0.295103]  acpi_reallocate_root_table+0x169/0x21a
[    0.296011]  acpi_early_init+0x75/0x17f
[    0.296723]  start_kernel+0xad5/0xcf3
[    0.297414]  i386_start_kernel+0xc1/0xd1
[    0.298209]  startup_32_smp+0x15f/0x164
[    0.298991] Modules linked in:
[    0.299653] random: get_random_bytes called from init_oops_id+0x58/0x70 with crng_init=0
[    0.299660] ---[ end trace 0894cc2a10a079b3 ]---


To reproduce:

        # build kernel
	cd linux
	cp config-5.7.0-rc7-00001-gc7b2a6d1affb7 .config
	make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong Chen