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Date: Mon, 30 Mar 2020 16:56:36 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Anshuman Khandual <anshuman.khandual@....com>
Cc: linux-mm@...ck.org, christophe.leroy@....fr,
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] f675f2f91d:
WARNING:at_mm/debug_vm_pgtable.c:#debug_vm_pgtable
FYI, we noticed the following commit (built with gcc-7):
commit: f675f2f91d0457e2b430936f0d756457fdcad1ca ("[PATCH V2 1/3] mm/debug: Add tests validating arch page table helpers for core features")
url: https://github.com/0day-ci/linux/commits/Anshuman-Khandual/mm-debug-Add-more-arch-page-table-helper-tests/20200324-161233
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------------------+---------------+------------+
| | next-20200323 | f675f2f91d |
+-------------------------------------------------------------------------------+---------------+------------+
| boot_successes | 1 | 0 |
| boot_failures | 3 | 4 |
| WARNING:suspicious_RCU_usage | 3 | 4 |
| drivers/char/ipmi/ipmi_msghandler.c:#RCU-list_traversed_in_non-reader_section | 3 | 4 |
| net/ipv4/fib_trie.c:#RCU-list_traversed_in_non-reader_section | 3 | 2 |
| WARNING:at_mm/debug_vm_pgtable.c:#debug_vm_pgtable | 0 | 4 |
| RIP:debug_vm_pgtable | 0 | 4 |
| calltrace:hrtimers_dead_cpu | 0 | 1 |
| calltrace:irq_exit | 0 | 3 |
+-------------------------------------------------------------------------------+---------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 283.486118] WARNING: CPU: 1 PID: 1 at mm/debug_vm_pgtable.c:371 debug_vm_pgtable+0x4dc/0x7e3
[ 283.487342] Modules linked in:
[ 283.487752] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.6.0-rc7-next-20200323-00001-gf675f2f91d045 #1
[ 283.488817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 283.489794] RIP: 0010:debug_vm_pgtable+0x4dc/0x7e3
[ 283.490361] Code: b5 fd 48 8b 7d d0 be 20 01 00 00 e8 3d 9f b5 fd 48 8b 75 c8 48 8b 7d d0 e8 30 9f b5 fd 48 8b 75 c8 48 8b 7d d0 e8 23 9f b5 fd <0f> 0b 48 8b 75 c8 48 8b 7d d0 e8 14 9f b5 fd 0f 0b 48 8b 75 c8 48
[ 283.492577] RSP: 0000:ffff888236493ed8 EFLAGS: 00010202
[ 283.493235] RAX: 00000001e1d31025 RBX: ffff88823e7f6cd8 RCX: ffffffffffffffff
[ 283.494135] RDX: 0000000000000000 RSI: 0000000000000025 RDI: 00000001e1d31000
[ 283.495002] RBP: ffff888236493f38 R08: 0000000000000001 R09: 0000000000000001
[ 283.495858] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88821d907000
[ 283.496748] R13: ffff88821d8fc498 R14: ffff88821d8fda90 R15: ffff88821d8fc000
[ 283.497614] FS: 0000000000000000(0000) GS:ffff888237800000(0000) knlGS:0000000000000000
[ 283.498585] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 283.499290] CR2: 00000000ffffffff CR3: 00000001e1222000 CR4: 00000000000406e0
[ 283.500165] Call Trace:
[ 283.500499] ? rest_init+0x240/0x240
[ 283.500985] kernel_init+0x13/0x110
[ 283.501433] ret_from_fork+0x24/0x30
[ 283.501907] irq event stamp: 4760776
[ 283.502366] hardirqs last enabled at (4760775): [<ffffffffb481e34d>] _raw_spin_unlock_irqrestore+0x4d/0x60
[ 283.511686] hardirqs last disabled at (4760776): [<ffffffffb3c038d4>] trace_hardirqs_off_thunk+0x1a/0x1c
[ 283.512914] softirqs last enabled at (4760748): [<ffffffffb4c002cf>] __do_softirq+0x2cf/0x4ad
[ 283.514086] softirqs last disabled at (4760741): [<ffffffffb3cf4f4d>] irq_exit+0xcd/0xe0
[ 283.515114] ---[ end trace 7e3383c4261f8faa ]---
To reproduce:
# build kernel
cd linux
cp config-5.6.0-rc7-next-20200323-00001-gf675f2f91d045 .config
make HOSTCC=gcc-7 CC=gcc-7 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,
Rong Chen
View attachment "config-5.6.0-rc7-next-20200323-00001-gf675f2f91d045" of type "text/plain" (133330 bytes)
View attachment "job-script" of type "text/plain" (4613 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (51016 bytes)
View attachment "trinity" of type "text/plain" (279264 bytes)
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