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Hello, kernel test robot noticed "BUG:unable_to_handle_page_fault_for_address" on: commit: 934c05f8c50fed91942a8aa9db46a0feae38594c ("use ptdesc in free_pte_range and pte_free_tlb series functions") https://github.com/alexshi/linux.git mmunstable2 in testcase: boot compiler: gcc-11 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (please refer to attached dmesg/kmsg for entire log/backtrace) +---------------------------------------------+------------+------------+ | | 5977eb9785 | 934c05f8c5 | +---------------------------------------------+------------+------------+ | BUG:unable_to_handle_page_fault_for_address | 0 | 6 | | EIP:clear_user | 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/202407221607.49138a71-oliver.sang@intel.com [ 3.645340][ T1] BUG: unable to handle page fault for address: 00100016 [ 3.645713][ T1] #PF: supervisor read access in kernel mode [ 3.646020][ T1] #PF: error_code(0x0000) - not-present page [ 3.646326][ T1] *pdpt = 000000002e992001 *pde = 0000000000000000 [ 3.646663][ T1] Oops: Oops: 0000 [#1] PREEMPT SMP [ 3.646933][ T1] CPU: 0 PID: 1 Comm: init Not tainted 6.10.0-rc6-00481-g934c05f8c50f #1 c5190225c17d1f7c5bcc60b13088ed2c9e32ac25 [ 3.647536][ T1] EIP: __lock_acquire (kernel/locking/lockdep.c:5006 (discriminator 1)) [ 3.647797][ T1] Code: 8b 75 d0 e8 d8 9b 3c 00 85 c0 0f 85 a0 01 00 00 31 db 83 c4 38 89 d8 5b 5e 5f 5d 31 d2 31 c9 e9 60 6d be 01 8d 74 26 00 31 c0 <81> 3b a0 cb 44 c4 0f 45 45 0c 83 fa 01 89 45 f0 0f 87 10 fb ff ff All code ======== 0: 8b 75 d0 mov -0x30(%rbp),%esi 3: e8 d8 9b 3c 00 call 0x3c9be0 8: 85 c0 test %eax,%eax a: 0f 85 a0 01 00 00 jne 0x1b0 10: 31 db xor %ebx,%ebx 12: 83 c4 38 add $0x38,%esp 15: 89 d8 mov %ebx,%eax 17: 5b pop %rbx 18: 5e pop %rsi 19: 5f pop %rdi 1a: 5d pop %rbp 1b: 31 d2 xor %edx,%edx 1d: 31 c9 xor %ecx,%ecx 1f: e9 60 6d be 01 jmp 0x1be6d84 24: 8d 74 26 00 lea 0x0(%rsi,%riz,1),%esi 28: 31 c0 xor %eax,%eax 2a:* 81 3b a0 cb 44 c4 cmpl $0xc444cba0,(%rbx) <-- trapping instruction 30: 0f 45 45 0c cmovne 0xc(%rbp),%eax 34: 83 fa 01 cmp $0x1,%edx 37: 89 45 f0 mov %eax,-0x10(%rbp) 3a: 0f 87 10 fb ff ff ja 0xfffffffffffffb50 Code starting with the faulting instruction =========================================== 0: 81 3b a0 cb 44 c4 cmpl $0xc444cba0,(%rbx) 6: 0f 45 45 0c cmovne 0xc(%rbp),%eax a: 83 fa 01 cmp $0x1,%edx d: 89 45 f0 mov %eax,-0x10(%rbp) 10: 0f 87 10 fb ff ff ja 0xfffffffffffffb26 [ 3.648776][ T1] EAX: 00000000 EBX: 00100016 ECX: 00000000 EDX: 00000000 [ 3.649136][ T1] ESI: 00100016 EDI: 00000000 EBP: c01f1b7c ESP: c01f1b38 [ 3.649504][ T1] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010046 [ 3.649890][ T1] CR0: 80050033 CR2: 00100016 CR3: 0054bd80 CR4: 000406b0 [ 3.650252][ T1] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 3.650611][ T1] DR6: fffe0ff0 DR7: 00000400 [ 3.650863][ T1] Call Trace: [ 3.651036][ T1] ? show_regs (arch/x86/kernel/dumpstack.c:479) [ 3.651256][ T1] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) [ 3.651457][ T1] ? oops_enter (kernel/panic.c:642) [ 3.651680][ T1] ? page_fault_oops (arch/x86/mm/fault.c:715) [ 3.651927][ T1] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 3.652177][ T1] ? kernelmode_fixup_or_oops+0x68/0x8c [ 3.652513][ T1] ? __bad_area_nosemaphore+0x133/0x238 [ 3.652850][ T1] ? bad_area_nosemaphore (arch/x86/mm/fault.c:835) [ 3.653116][ T1] ? do_user_addr_fault (arch/x86/mm/fault.c:1452) [ 3.653389][ T1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 3.653693][ T1] ? exc_page_fault (arch/x86/include/asm/irqflags.h:26 arch/x86/include/asm/irqflags.h:67 arch/x86/include/asm/irqflags.h:127 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) [ 3.653952][ T1] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 3.654265][ T1] ? handle_exception (arch/x86/entry/entry_32.S:1054) [ 3.654524][ T1] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 3.654838][ T1] ? __lock_acquire (kernel/locking/lockdep.c:5006 (discriminator 1)) [ 3.655087][ T1] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 3.655400][ T1] ? __lock_acquire (kernel/locking/lockdep.c:5006 (discriminator 1)) [ 3.655650][ T1] ? register_lock_class (kernel/locking/lockdep.c:1285 (discriminator 13)) [ 3.655916][ T1] ? filemap_get_entry (include/linux/rcupdate.h:339 include/linux/rcupdate.h:812 mm/filemap.c:1858) [ 3.656179][ T1] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 3.656408][ T1] ? pmd_install (mm/memory.c:424) [ 3.656638][ T1] ? slow_virt_to_phys (arch/x86/mm/pat/set_memory.c:811) [ 3.656896][ T1] _raw_spin_lock (include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 3.657130][ T1] ? pmd_install (mm/memory.c:424) [ 3.657451][ T1] pmd_install (mm/memory.c:424) [ 3.657669][ T1] finish_fault (mm/memory.c:4870) [ 3.657902][ T1] ? trace_hardirqs_on (kernel/trace/trace_preemptirq.c:63 (discriminator 13)) [ 3.658156][ T1] do_pte_missing (mm/memory.c:5100 mm/memory.c:5193 mm/memory.c:3947) [ 3.658398][ T1] handle_pte_fault (mm/memory.c:5522) [ 3.658647][ T1] ? __lock_release+0x4f/0x17c [ 3.658921][ T1] __handle_mm_fault (mm/memory.c:5666) [ 3.659174][ T1] ? mt_find (lib/maple_tree.c:6952) [ 3.659394][ T1] ? __handle_mm_fault (mm/memory.c:5800) [ 3.659656][ T1] handle_mm_fault (mm/memory.c:5745 mm/memory.c:5832) [ 3.659897][ T1] ? lock_mm_and_find_vma (mm/memory.c:5921) [ 3.660167][ T1] do_user_addr_fault (include/linux/sched/signal.h:425 arch/x86/mm/fault.c:1391) [ 3.660426][ T1] exc_page_fault (arch/x86/include/asm/irqflags.h:26 arch/x86/include/asm/irqflags.h:67 arch/x86/include/asm/irqflags.h:127 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) [ 3.660663][ T1] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 3.660905][ T1] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 3.661221][ T1] handle_exception (arch/x86/entry/entry_32.S:1054) [ 3.661478][ T1] EIP: clear_user (arch/x86/lib/usercopy_32.c:66) [ 3.661712][ T1] Code: 34 b8 00 00 00 c0 29 d8 39 c7 77 29 ba 42 00 00 00 b8 63 1d 95 c3 e8 fe 6f 5c fe 89 da 31 c0 c1 eb 02 83 e2 03 89 d9 8d 76 00 ab 89 d1 f3 aa 8d 76 00 89 cb 89 d8 5b 5f 5d 31 d2 31 c9 e9 4a All code ======== 0: 34 b8 xor $0xb8,%al 2: 00 00 add %al,(%rax) 4: 00 c0 add %al,%al 6: 29 d8 sub %ebx,%eax 8: 39 c7 cmp %eax,%edi a: 77 29 ja 0x35 c: ba 42 00 00 00 mov $0x42,%edx 11: b8 63 1d 95 c3 mov $0xc3951d63,%eax 16: e8 fe 6f 5c fe call 0xfffffffffe5c7019 1b: 89 da mov %ebx,%edx 1d: 31 c0 xor %eax,%eax 1f: c1 eb 02 shr $0x2,%ebx 22: 83 e2 03 and $0x3,%edx 25: 89 d9 mov %ebx,%ecx 27: 8d 76 00 lea 0x0(%rsi),%esi 2a:* f3 ab rep stos %eax,%es:(%rdi) <-- trapping instruction 2c: 89 d1 mov %edx,%ecx 2e: f3 aa rep stos %al,%es:(%rdi) 30: 8d 76 00 lea 0x0(%rsi),%esi 33: 89 cb mov %ecx,%ebx 35: 89 d8 mov %ebx,%eax 37: 5b pop %rbx 38: 5f pop %rdi 39: 5d pop %rbp 3a: 31 d2 xor %edx,%edx 3c: 31 c9 xor %ecx,%ecx 3e: e9 .byte 0xe9 3f: 4a rex.WX Code starting with the faulting instruction =========================================== 0: f3 ab rep stos %eax,%es:(%rdi) 2: 89 d1 mov %edx,%ecx 4: f3 aa rep stos %al,%es:(%rdi) 6: 8d 76 00 lea 0x0(%rsi),%esi 9: 89 cb mov %ecx,%ebx b: 89 d8 mov %ebx,%eax d: 5b pop %rbx e: 5f pop %rdi f: 5d pop %rbp 10: 31 d2 xor %edx,%edx 12: 31 c9 xor %ecx,%ecx 14: e9 .byte 0xe9 15: 4a rex.WX The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240722/202407221607.49138a71-oliver.sang@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki