hi, Alex,
On Tue, Jul 23, 2024 at 09:58:25AM +0800, Alex Shi wrote:
>
>
> On 7/23/24 9:05 AM, kernel test robot wrote:
> >
> > hi, Alex Shi,
> >
> > we noticed there is a mmunstable3 branch now, but there is no same title patch
> > there. not sure if this report is still useful, below report just FYI.
>
> Hi Oliver,
>
> Thanks a lot for your testing and founding on my unreleased code branch!
> The problem should be resolved on my latest code yesterday.
> But multiple archs maybe still are fragile in the branch. Are there bootable in virtual machine, like arm, s390, etc?
we did boot test in vm, but only for x86_64 or i386.
you may notice we also send another report
"[alexshi:mmunstable3] [mm/memory] f6ba7ce983: kernel_BUG_at_mm/page_alloc.c"
for both commit, we made some further check and cofirmed they cannot boot
successfully on both vm/bm, again, we only test x86_64/i386 for now.
>
> Thanks again for your great work!
>
> Alex
>
> >
> >
> >
> > 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 <oliver.sang@xxxxxxxxx>
> > | Closes: https://lore.kernel.org/oe-lkp/202407221607.49138a71-oliver.sang@xxxxxxxxx
> >
> >
> > [ 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 <f3> 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@xxxxxxxxx
> >
> >
> >
>
