Message-ID: <20200709061122.GN3874@shao2-debian>
Date:   Thu, 9 Jul 2020 14:11:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     linux-mm@...ck.org, Anshuman Khandual <anshuman.khandual@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
        linux-riscv@...ts.infradead.org, x86@...nel.org,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        lkp@...ts.01.org
Subject: [mm/debug_vm_pgtable] a97a171093:
 BUG:unable_to_handle_page_fault_for_address

Greeting,

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

commit: a97a17109332c3a9e361553adfa383c1e5205f3b ("[PATCH V4 2/4] mm/debug_vm_pgtable: Add tests validating advanced arch page table helpers")
url: https://github.com/0day-ci/linux/commits/Anshuman-Khandual/mm-debug_vm_pgtable-Add-some-more-tests/20200706-085212
base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git dcb7fd82c75ee2d6e6f9d8cc71c52519ed52e258

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):


+---------------------------------------------+------------+------------+
|                                             | 30011bfca7 | a97a171093 |
+---------------------------------------------+------------+------------+
| boot_successes                              | 4          | 0          |
| boot_failures                               | 0          | 4          |
| BUG:unable_to_handle_page_fault_for_address | 0          | 4          |
| Oops:#[##]                                  | 0          | 4          |
| RIP:hugetlb_advanced_tests                  | 0          | 4          |
| Kernel_panic-not_syncing:Fatal_exception    | 0          | 4          |
+---------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>


[   94.349598] BUG: unable to handle page fault for address: ffffed10a7ffddff
[   94.351039] #PF: supervisor read access in kernel mode
[   94.352172] #PF: error_code(0x0000) - not-present page
[   94.353256] PGD 43ffed067 P4D 43ffed067 PUD 43fdee067 PMD 0 
[   94.354484] Oops: 0000 [#1] SMP KASAN
[   94.355238] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.8.0-rc4-00002-ga97a17109332c #1
[   94.360456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[   94.361950] RIP: 0010:hugetlb_advanced_tests+0x137/0x699
[   94.363026] Code: 8b 13 4d 85 f6 75 0b 48 ff 05 2c e4 6a 01 31 ed eb 41 bf f8 ff ff ff ba ff ff 37 00 4c 01 f7 48 c1 e2 2a 48 89 f9 48 c1 e9 03 <80> 3c 11 00 74 05 e8 cd c0 67 fa ba f8 ff ff ff 49 8b 2c 16 48 85
[   94.366592] RSP: 0000:ffffc90000047d30 EFLAGS: 00010a06
[   94.367693] RAX: 1ffffffff1049b80 RBX: ffff888380525308 RCX: 1ffff110a7ffddff
[   94.369215] RDX: dffffc0000000000 RSI: 1ffff11087ffdc00 RDI: ffff88853ffeeff8
[   94.370693] RBP: 000000000018e510 R08: 0000000000000025 R09: 0000000000000001
[   94.372165] R10: ffff888380523c07 R11: ffffed10700a4780 R12: ffff88843208e510
[   94.373674] R13: 0000000000000025 R14: ffff88843ffef000 R15: 000031e01ae61000
[   94.375147] FS:  0000000000000000(0000) GS:ffff8883a3800000(0000) knlGS:0000000000000000
[   94.376883] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   94.378051] CR2: ffffed10a7ffddff CR3: 0000000004e15000 CR4: 00000000000406a0
[   94.379522] Call Trace:
[   94.380073]  debug_vm_pgtable+0xd81/0x2029
[   94.380871]  ? pmd_advanced_tests+0x621/0x621
[   94.381819]  do_one_initcall+0x1eb/0xbd0
[   94.382551]  ? trace_event_raw_event_initcall_finish+0x240/0x240
[   94.383634]  ? rcu_read_lock_sched_held+0xb9/0x110
[   94.388727]  ? rcu_read_lock_held+0xd0/0xd0
[   94.389604]  ? __kasan_check_read+0x1d/0x30
[   94.390485]  kernel_init_freeable+0x430/0x4f8
[   94.391416]  ? rest_init+0x3f8/0x3f8
[   94.392185]  kernel_init+0x14/0x1e8
[   94.392918]  ret_from_fork+0x22/0x30
[   94.393662] Modules linked in:
[   94.394289] CR2: ffffed10a7ffddff
[   94.395000] ---[ end trace 8ca5a1655dfb8c39 ]---


To reproduce:

        # build kernel
	cd linux
	cp config-5.8.0-rc4-00002-ga97a17109332c .config
	make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 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,
lkp


View attachment "config-5.8.0-rc4-00002-ga97a17109332c" of type "text/plain" (115232 bytes)

View attachment "job-script" of type "text/plain" (4720 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (12620 bytes)

Powered by blists - more mailing lists