Hello, kernel test robot noticed "BUG:kernel_NULL_pointer_dereference,address" on: commit: b22a2ae5b4ed0cc0b7f66a6b0b359563c18b63e9 ("[PATCH] mm: introduce statistic for inode's gen&tier") url: https://github.com/intel-lab-lkp/linux/commits/zhaoyang-huang/mm-introduce-statistic-for-inode-s-gen-tier/20230627-172036 base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/all/1687857438-29142-1-git-send-email-zhaoyang.huang@unisoc.com/ patch subject: [PATCH] mm: introduce statistic for inode's gen&tier in testcase: boot compiler: gcc-12 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +---------------------------------------------+------------+------------+ | | 1e8d64bb8c | b22a2ae5b4 | +---------------------------------------------+------------+------------+ | boot_successes | 8 | 0 | | boot_failures | 0 | 7 | | BUG:kernel_NULL_pointer_dereference,address | 0 | 7 | | Oops:#[##] | 0 | 7 | | EIP:folio_mark_accessed | 0 | 7 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 7 | +---------------------------------------------+------------+------------+ 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/202306282225.53fbc6e9-oliver.sang@intel.com [ 11.939571][ T71] BUG: kernel NULL pointer dereference, address: 000000e8 [ 11.940485][ T71] #PF: supervisor write access in kernel mode [ 11.941239][ T71] #PF: error_code(0x0002) - not-present page [ 11.941910][ T71] *pde = 00000000 [ 11.942425][ T71] Oops: 0002 [#1] PREEMPT SMP [ 11.943029][ T71] CPU: 1 PID: 71 Comm: init Not tainted 6.4.0-rc4-00532-gb22a2ae5b4ed #10 [ 11.944053][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 11.945294][ T71] EIP: folio_mark_accessed+0x67/0x129 [ 11.945967][ T71] Code: 00 8d 8a 00 00 00 02 89 c2 81 e2 ff ff ff f9 09 ca f0 0f b1 13 74 10 89 c2 81 e2 00 00 00 06 81 fa 00 00 00 06 75 da 8b 43 0c ff 80 e8 00 00 00 e9 b2 00 00 00 a8 02 75 06 f0 80 0b 02 eb 7d [ 11.948103][ T71] EAX: 00000000 EBX: e8a4b7d0 ECX: 02000000 EDX: 42001042 [ 11.948953][ T71] ESI: c5677da8 EDI: 00000000 EBP: c5677c70 ESP: c5677c68 [ 11.949750][ T71] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246 [ 11.950693][ T71] CR0: 80050033 CR2: 000000e8 CR3: 2df60000 CR4: 000406d0 [ 11.951426][ T71] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 11.952130][ T71] DR6: fffe0ff0 DR7: 00000400 [ 11.952659][ T71] Call Trace: [ 11.953146][ T71] ? show_regs+0x60/0x66 [ 11.953625][ T71] ? __die_body+0x13/0x4b [ 11.954068][ T71] ? __die+0x22/0x24 [ 11.954516][ T71] ? page_fault_oops+0x4a/0x73 [ 11.955128][ T71] ? kernelmode_fixup_or_oops+0x98/0xa0 [ 11.955916][ T71] ? __bad_area_nosemaphore+0x41/0x1ca [ 11.956642][ T71] ? __lock_acquire+0x66c/0x89b [ 11.957257][ T71] ? bad_area_nosemaphore+0xa/0xd [ 11.957889][ T71] ? do_user_addr_fault+0xed/0x41f [ 11.958554][ T71] ? exc_page_fault+0x13b/0x15b [ 11.959176][ T71] ? pvclock_clocksource_read_nowd+0x172/0x172 [ 11.959903][ T71] ? handle_exception+0x14d/0x14d [ 11.960548][ T71] ? get_user_pages_unlocked+0x100/0x1e2 [ 11.961197][ T71] ? pvclock_clocksource_read_nowd+0x172/0x172 [ 11.961887][ T71] ? folio_mark_accessed+0x67/0x129 [ 11.962507][ T71] ? get_user_pages_unlocked+0x100/0x1e2 [ 11.963143][ T71] ? pvclock_clocksource_read_nowd+0x172/0x172 [ 11.963727][ T71] ? folio_mark_accessed+0x67/0x129 [ 11.964242][ T71] mark_page_accessed+0xd/0xf [ 11.964727][ T71] zap_pte_range+0x173/0x336 [ 11.965213][ T71] unmap_page_range+0xb2/0x125 [ 11.965816][ T71] unmap_single_vma+0x9e/0xa8 [ 11.966409][ T71] unmap_vmas+0x6d/0x9d [ 11.966927][ T71] exit_mmap+0xb3/0x22a [ 11.967479][ T71] __mmput+0x19/0x81 [ 11.968046][ T71] mmput+0x27/0x2a [ 11.968572][ T71] exec_mmap+0x210/0x225 [ 11.969131][ T71] begin_new_exec+0xb9/0x2d0 [ 11.969726][ T71] load_elf_binary+0x204/0x808 [ 11.970322][ T71] ? search_binary_handler+0x8e/0x195 [ 11.970978][ T71] ? search_binary_handler+0x8e/0x195 [ 11.971632][ T71] ? lock_release+0x99/0xc0 [ 11.972154][ T71] search_binary_handler+0x93/0x195 [ 11.972817][ T71] exec_binprm+0x91/0x18f [ 11.973376][ T71] bprm_execve+0x144/0x1cf [ 11.974002][ T71] bprm_execve+0x5d/0x6d [ 11.974562][ T71] do_execveat_common+0x150/0x16c [ 11.975205][ T71] __ia32_sys_execve+0x23/0x2a [ 11.975809][ T71] __do_fast_syscall_32+0x94/0xb3 [ 11.976437][ T71] do_fast_syscall_32+0x29/0x5b [ 11.977054][ T71] do_SYSENTER_32+0x15/0x17 [ 11.977640][ T71] entry_SYSENTER_32+0xa2/0xfb [ 11.978246][ T71] EIP: 0xb7faa579 [ 11.978743][ T71] Code: Unable to access opcode bytes at 0xb7faa54f. [ 11.979529][ T71] EAX: ffffffda EBX: 00468928 ECX: 00467778 EDX: 00451f20 [ 11.980351][ T71] ESI: 00451f20 EDI: b7f27ff4 EBP: bfcc8438 ESP: bfcc83c4 [ 11.981188][ T71] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000292 [ 11.982140][ T71] Modules linked in: [ 11.982661][ T71] CR2: 00000000000000e8 [ 11.983208][ T71] ---[ end trace 0000000000000000 ]--- [ 11.983883][ T71] EIP: folio_mark_accessed+0x67/0x129 [ 11.984569][ T71] Code: 00 8d 8a 00 00 00 02 89 c2 81 e2 ff ff ff f9 09 ca f0 0f b1 13 74 10 89 c2 81 e2 00 00 00 06 81 fa 00 00 00 06 75 da 8b 43 0c ff 80 e8 00 00 00 e9 b2 00 00 00 a8 02 75 06 f0 80 0b 02 eb 7d [ 11.986726][ T71] EAX: 00000000 EBX: e8a4b7d0 ECX: 02000000 EDX: 42001042 [ 11.987547][ T71] ESI: c5677da8 EDI: 00000000 EBP: c5677c70 ESP: c5677c68 [ 11.988372][ T71] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246 [ 11.989334][ T71] CR0: 80050033 CR2: b7faa54f CR3: 2df60000 CR4: 000406d0 [ 12.000570][ T71] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 12.001448][ T71] DR6: fffe0ff0 DR7: 00000400 [ 12.002053][ T71] Kernel panic - not syncing: Fatal exception [ 12.003103][ T71] Kernel Offset: disabled To reproduce: # build kernel cd linux cp config-6.4.0-rc4-00532-gb22a2ae5b4ed .config make HOSTCC=gcc-12 CC=gcc-12 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-12 CC=gcc-12 ARCH=i386 INSTALL_MOD_PATH= modules_install cd find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki