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Date: Sat, 28 Mar 2020 21:07:37 +0800
From: kernel test robot <lkp@...el.com>
To: Anshuman Khandual <anshuman.khandual@....com>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>,
Christophe Leroy <christophe.leroy@....fr>,
Qian Cai <cai@....pw>,
Catalin Marinas <catalin.marinas@....com>,
Ingo Molnar <mingo@...nel.org>,
Mike Rapoport <rppt@...ux.ibm.com>,
Vineet Gupta <vgupta@...opsys.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>,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: [mm/debug] f8bf55f05f: BUG:non-zero_pgtables_bytes_on_freeing_mm
FYI, we noticed the following commit (built with gcc-7):
commit: f8bf55f05f7d665fdf5942ceb28a82089ddad44a ("mm/debug: add tests validating architecture page table helpers")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: boot
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):
+-------------------------------------------+------------+------------+
| | bf99016ea0 | f8bf55f05f |
+-------------------------------------------+------------+------------+
| boot_successes | 20 | 0 |
| boot_failures | 0 | 20 |
| BUG:non-zero_pgtables_bytes_on_freeing_mm | 0 | 18 |
| BUG:kernel_hang_in_boot_stage | 0 | 1 |
| BUG:workqueue_lockup-pool | 0 | 1 |
+-------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>
[ 7.050643] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status
[ 7.051641] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status
[ 7.054849] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status
[ 7.054850] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status
[ 7.056452] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status
[ 7.059482] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status
[ 7.059483] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status
[ 7.076240] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status
[ 7.082878] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status
[ 7.082881] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status
[ 7.085979] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status
[ 7.093291] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status
[ 7.094066] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status
[ 7.096582] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status
[ 7.102576] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status
[ 7.102599] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status
[ 7.107367] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status
[ 7.113918] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status
[ 7.113920] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status
[ 7.117058] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status
[ 7.124533] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status
[ 7.125013] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status
[ 7.127918] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status
[ 7.134354] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status
[ 7.134357] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo
[ 7.137419] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo
[ 7.143157] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo
[ 7.143160] ### dt-test ### EXPECT \ : OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8
[ 7.146130] ### dt-test ### EXPECT \ : OF: overlay: overlay #6 is not topmost
[ 7.148434] OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8
[ 7.151941] OF: overlay: overlay #6 is not topmost
[ 7.152965] ### dt-test ### EXPECT / : OF: overlay: overlay #6 is not topmost
[ 7.152966] ### dt-test ### EXPECT / : OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8
[ 7.157527] ### dt-test ### EXPECT \ : i2c i2c-1: Added multiplexed i2c bus 2
[ 7.159418] i2c i2c-0: Added multiplexed i2c bus 1
[ 7.175401] ### dt-test ### EXPECT / : i2c i2c-1: Added multiplexed i2c bus 2
[ 7.175404] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status
[ 7.176802] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status
[ 7.183238] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status
[ 7.183241] ### dt-test ### EXPECT \ : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status
[ 7.186407] OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status
[ 7.193861] ### dt-test ### EXPECT / : OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status
[ 7.193864] ### dt-test ### EXPECT \ : i2c i2c-1: Added multiplexed i2c bus 3
[ 7.200011] i2c i2c-0: Added multiplexed i2c bus 2
[ 7.202698] ### dt-test ### EXPECT / : i2c i2c-1: Added multiplexed i2c bus 3
[ 7.209235] ### dt-test ### EXPECT \ : GPIO line <<int>> (line-B-input) hogged as input
[ 7.212134] ### dt-test ### EXPECT \ : GPIO line <<int>> (line-A-input) hogged as input
[ 7.213792] GPIO line 509 (line-B-input) hogged as input
[ 7.215209] GPIO line 503 (line-A-input) hogged as input
[ 7.216541] ### dt-test ### EXPECT / : GPIO line <<int>> (line-A-input) hogged as input
[ 7.218292] ### dt-test ### EXPECT / : GPIO line <<int>> (line-B-input) hogged as input
[ 7.219753] ### dt-test ### EXPECT \ : GPIO line <<int>> (line-D-input) hogged as input
[ 7.224715] GPIO line 501 (line-D-input) hogged as input
[ 7.226085] ### dt-test ### EXPECT / : GPIO line <<int>> (line-D-input) hogged as input
[ 7.229424] ### dt-test ### EXPECT \ : GPIO line <<int>> (line-C-input) hogged as input
[ 7.231653] GPIO line 495 (line-C-input) hogged as input
[ 7.232861] ### dt-test ### EXPECT / : GPIO line <<int>> (line-C-input) hogged as input
[ 7.239447] ### dt-test ### FAIL of_unittest_overlay_high_level():2982 overlay_base_root not initialized
[ 7.240485] ### dt-test ### end of unittest - 254 passed, 1 failed
[ 7.570301] CE: hpet increased min_delta_ns to 5000 nsec
[ 7.570449] CE: hpet increased min_delta_ns to 7500 nsec
[ 7.570563] CE: hpet increased min_delta_ns to 11250 nsec
[ 7.570645] CE: hpet increased min_delta_ns to 16875 nsec
[ 7.570783] CE: hpet increased min_delta_ns to 25312 nsec
[ 9.273375] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[ 9.276257] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 9.279231] _warn_unseeded_randomness: 27 callbacks suppressed
[ 9.279239] random: get_random_bytes called from addrconf_dad_kick+0x55/0xb0 with crng_init=1
[ 9.292890] Sending DHCP requests .
[ 9.292901] random: get_random_bytes called from ip_auto_config+0x510/0xebf with crng_init=1
[ 9.293233] , OK
[ 9.296007] IP-Config: Got DHCP answer from 10.0.2.2, my address is 10.0.2.15
[ 9.297449] IP-Config: Complete:
[ 9.298054] device=eth0, hwaddr=52:54:00:12:34:56, ipaddr=10.0.2.15, mask=255.255.255.0, gw=10.0.2.2
[ 9.299789] host=vm-snb-6, domain=, nis-domain=(none)
[ 9.300976] bootserver=10.0.2.2, rootserver=10.0.2.2, rootpath=
[ 9.300978] nameserver0=10.0.2.3
[ 9.304270] debug_vm_pgtable: debug_vm_pgtable: Validating architecture page table helpers
[ 9.306147] random: get_random_u32 called from debug_vm_pgtable+0x2c/0x6a5 with crng_init=1
[ 9.306206] BUG: non-zero pgtables_bytes on freeing mm: -4096
[ 9.317950] Freeing unused kernel image (initmem) memory: 872K
[ 9.319376] Write protecting kernel text and read-only data: 21104k
[ 9.322456] NX-protecting the kernel data: 14216k
[ 9.324940] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 9.326221] rodata_test: all tests were successful
[ 9.327341] x86/mm: Checking user space page tables
[ 9.328395] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 9.329867] Run /init as init process
[ 9.330602] with arguments:
[ 9.331216] /init
[ 9.331698] with environment:
[ 9.332360] HOME=/
[ 9.333015] TERM=linux
[ 9.333592] user=lkp
[ 9.334128] job=/lkp/jobs/scheduled/vm-snb-6/boot-1-openwrt-i386-generic-20190428.cgz-f8bf55f05f7d665fdf5942ceb28a82089ddad44a-20200328-60525-1ymm2c4-11.yaml
[ 9.337271] ARCH=i386
[ 9.337855] kconfig=i386-randconfig-h003-20200326
[ 9.338861] branch=linux-devel/devel-catchup-202003270319
[ 9.340058] commit=f8bf55f05f7d665fdf5942ceb28a82089ddad44a
[ 9.341438] BOOT_IMAGE=/pkg/linux/i386-randconfig-h003-20200326/gcc-7/f8bf55f05f7d665fdf5942ceb28a82089ddad44a/vmlinuz-5.6.0-rc7-12014-gf8bf55f05f7d6
[ 9.343123] max_uptime=600
[ 9.343456] RESULT_ROOT=/result/boot/1/vm-snb/openwrt-i386-generic-20190428.cgz/i386-randconfig-h003-20200326/gcc-7/f8bf55f05f7d665fdf5942ceb28a82089ddad44a/8
[ 9.345009] LKP_SERVER=inn
[ 9.345337] selinux=0
[ 9.345618] apic=debug
[ 9.345908] softlockup_panic=1
[ 9.346285] nmi_watchdog=panic
[ 9.346643] prompt_ramdisk=0
[ 9.346984] vga=normal
[ 9.347272] watchdog_thresh=60
[ 9.352224] init: Console is alive
[ 9.353943] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 9.355146] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 9.367256] init: - preinit -
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[ 10.425360] _warn_unseeded_randomness: 56 callbacks suppressed
[ 10.425370] random: get_random_bytes called from flow_hash_from_keys+0xd6/0x1c0 with crng_init=1
[ 10.425630] random: get_random_bytes called from addrconf_dad_kick+0x55/0xb0 with crng_init=1
[ 10.426200] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 11.560234] _warn_unseeded_randomness: 3 callbacks suppressed
[ 11.560242] random: get_random_u32 called from cache_alloc_refill+0x62d/0xf10 with crng_init=1
[ 11.560951] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 11.560960] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 12.584597] _warn_unseeded_randomness: 7 callbacks suppressed
[ 12.584607] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 12.587470] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 12.587477] random: get_random_u32 called from arch_align_stack+0x35/0x50 with crng_init=1
[ 12.609699] mount_root: mounting /dev/root
[ 12.632418] urandom-seed: Seed file not found (/etc/urandom.seed)
[ 12.642196] procd: - early -
[ 13.190774] procd: - ubus -
[ 13.196472] random: ubusd: uninitialized urandom read (4 bytes read)
[ 13.242855] random: ubusd: uninitialized urandom read (4 bytes read)
[ 13.244220] random: ubusd: uninitialized urandom read (4 bytes read)
[ 13.249986] procd: - init -
Please press Enter to activate this console.
[ 13.327004] kmodloader: loading kernel modules from /etc/modules.d/*
[ 13.330177] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 14.336904] _warn_unseeded_randomness: 102 callbacks suppressed
[ 14.336912] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 14.336922] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 14.336927] random: get_random_u32 called from arch_align_stack+0x35/0x50 with crng_init=1
[ 14.556753] urandom_read: 5 callbacks suppressed
[ 14.556755] random: jshn: uninitialized urandom read (4 bytes read)
[ 14.564888] random: ubusd: uninitialized urandom read (4 bytes read)
[ 15.345890] _warn_unseeded_randomness: 615 callbacks suppressed
[ 15.345898] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 15.345905] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 15.345909] random: get_random_u32 called from arch_align_stack+0x35/0x50 with crng_init=1
[ 16.361307] _warn_unseeded_randomness: 390 callbacks suppressed
[ 16.361314] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 16.361322] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 16.361327] random: get_random_u32 called from arch_align_stack+0x35/0x50 with crng_init=1
[ 17.365403] _warn_unseeded_randomness: 284 callbacks suppressed
[ 17.365412] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 17.365420] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 17.365425] random: get_random_u32 called from arch_align_stack+0x35/0x50 with crng_init=1
LKP: HOSTNAME vm-snb-6, MAC 52:54:00:12:34:56, kernel 5.6.0-rc7-12014-gf8bf55f05f7d6 2, serial console /dev/ttyS0
[ 18.346174] Kernel tests: Boot OK!
[ 18.346174] /lkp/lkp/src/bin/run-lkp
[ 18.346174] RESULT_ROOT=/result/boot/1/vm-snb/openwrt-i386-generic-20190428.cgz/i386-randconfig-h003-20200326/gcc-7/f8bf55f05f7d665fdf5942ceb28a82089ddad44a/8
[ 18.346174] job=/lkp/jobs/scheduled/vm-snb-6/boot-1-openwrt-i386-generic-20190428.cgz-f8bf55f05f7d665fdf5942ceb28a82089ddad44a-20200328-60525-1ymm2c4-11.yaml
[ 18.346174] result_service=raw_upload, RESULT_MNT=/inn/result, RESULT_ROOT=/inn/result/boot/1/vm-snb/openwrt-i386-generic-20190428.cgz/i386-randconfig-h003-20200326/gcc-7/f8bf55f05f7d665fdf5942ceb28a82089ddad44a/8
[ 18.346174] run-job /lkp/jobs/scheduled/vm-snb-6/boot-1-openwrt-i386-generic-20190428.cgz-f8bf55f05f7d665fdf5942ceb28a82089ddad44a-20200328-60525-1ymm2c4-11.yaml
[ 18.491299] _warn_unseeded_randomness: 216 callbacks suppressed
[ 18.491308] random: get_random_u32 called from arch_pick_mmap_layout+0x59/0x130 with crng_init=1
[ 18.491318] random: get_random_u32 called from randomize_stack_top+0x1d/0x40 with crng_init=1
[ 18.491323] random: get_random_u32 called from arch_align_stack+0x35/0x50 with crng_init=1
[ 19.892854] random: crng init done
[ 19.893497] random: 82 get_random_xx warning(s) missed due to ratelimiting
[ 23.382687] target ucode:
[ 24.383652] sleep started
[ 25.384495] /bin/wget -q http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-snb-6/boot-1-openwrt-i386-generic-20190428.cgz-f8bf55f05f7d665fdf5942ceb28a82089ddad44a-20200328-60525-1ymm2c4-11.yaml&job_state=post_run -O /dev/null
[ 32.652245] kill 869 vmstat --timestamp -n 10
[ 32.652245] kill 865 cat /proc/kmsg
[ 32.652245] wait for background processes: 878 873 oom-killer meminfo
[ 34.365971] CE: hpet increased min_delta_ns to 37968 nsec
[ 35.265079] CE: hpet increased min_delta_ns to 56952 nsec
[ 36.654596] /bin/wget -q http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-snb-6/boot-1-openwrt-i386-generic-20190428.cgz-f8bf55f05f7d665fdf5942ceb28a82089ddad44a-20200328-60525-1ymm2c4-11.yaml&loadavg=1.46%200.37%200.12%201/75%201017&start_time=1585341190&end_time=1585341191&version=/lkp/lkp/.src-20200327-172855:1a2d9638:5a9d8b33b& -O /dev/null
To reproduce:
# build kernel
cd linux
cp config-5.6.0-rc7-12014-gf8bf55f05f7d6 .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 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-5.6.0-rc7-12014-gf8bf55f05f7d6" of type "text/plain" (139144 bytes)
View attachment "job-script" of type "text/plain" (4728 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (14980 bytes)
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