Ubuntu
linux package

[Artful] ltp rwtest - Unable to handle kernel paging request at virtual address

Bug #1721067 reported by Manoj Iyer on 2017-10-03

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Fix Released	Critical	Manoj Iyer
	Artful	Fix Released	Critical	Manoj Iyer

Bug Description

[Impact]
Running LTP rwtest casues system crash on ARM64 with 4k pages in THP code.

Ubuntu Artful Aardvark (development branch) XXX ttyAMA1

XXX login: [412822.864619] Unable to handle kernel paging request at virtual address ffffb119c0000fc0
[412822.871676] swapper pgtable: 4k pages, 48-bit VAs, pgd = ffff14a623699000
[412822.878551] [ffffb119c0000fc0] *pgd=00000017ffff7003, *pud=00000017ffff6003, *pmd=0000000000000000
[412822.887571] Internal error: Oops: 96000006 [#1] SMP
[412822.892499] Modules linked in: binfmt_misc nls_iso8859_1 shpchp tpm_crb ipmi_ssif cppc_cpufreq ipmi_devintf ipmi_msghandler hdma i2c_qup hdma_mgmt ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage at803x aes_ce_blk aes_ce_cipher crc32_ce crct10dif_ce ghash_ce mlx5_core sha2_ce sha1_ce mlxfw devlink ptp pps_core ahci_platform libahci_platform libahci qcom_emac sdhci_acpi sdhci xhci_plat_hcd aes_neon_bs aes_neon_blk crypto_simd cryptd
[412822.949443] CPU: 3 PID: 19639 Comm: doio Not tainted 4.13.0-12-generic #13-Ubuntu
[412822.956993] Hardware name: XXX
[412822.970882] task: ffffb1314c43ad00 task.stack: ffffb1314c610000
[412822.976877] PC is at check_pte+0x20/0x148
[412822.980953] LR is at page_vma_mapped_walk+0x244/0x4c0
[412822.986073] pc : [<ffff14a6222d8070>] lr : [<ffff14a6222d83dc>] pstate: 00400145
[412822.993538] sp : ffffb1314c613770
[412822.996923] x29: ffffb1314c613770 x28: ffffb1314c613be0
[412823.002305] x27: 0000ffffaf7f8000 x26: 0008000000000080
[412823.007687] x25: 00000000000001f8 x24: 0400000000000001
[412823.013069] x23: ffff14a622e8f000 x22: ffffb12c9afc8400
[412823.018451] x21: ffff7ec4bedfe080 x20: 0400000000000001
[412823.023833] x19: ffffb1314c613850 x18: 0000000000000001
[412823.029215] x17: 0000000000000001 x16: 0000000000000000
[412823.034597] x15: 0000000000000000 x14: ffffb12579b91fd0
[412823.039979] x13: 0000000000000040 x12: ffffffffffffff83
[412823.045360] x11: 0000000000000000 x10: ffffb131bffddd00
[412823.050742] x9 : 0000000000000006 x8 : 0000000000000001
[412823.056124] x7 : ffff14a623051811 x6 : 0000008000080000
[412823.061506] x5 : 01ffff000000107d x4 : ffff14a6222d96e0
[412823.066888] x3 : 0000000000000001 x2 : 0000000000000001
[412823.072270] x1 : ffffb119c0000fc0 x0 : 0000000000000001
[412823.077652] Process doio (pid: 19639, stack limit = 0xffffb1314c610000)
[412823.084336] Stack: (0xffffb1314c613770 to 0xffffb1314c614000)
[412823.090152] 3760: ffffb1314c613790 ffff14a6222d83dc
[412823.098052] 3780: ffffb1314c613850 ffffb12500000000 ffffb1314c6137e0 ffff14a6222d97a0
[412823.105951] 37a0: ffffb13144152af0 ffffb1314c61393c 0000ffffaf7f9000 0040000000000001
[412823.113850] 37c0: 0040000000000041 ffffb1314c61393c 0000000000000000 0000000001011200
[412823.121750] 37e0: ffffb1314c613890 ffff14a6222d9a40 0000ffffaf7f8000 ffff7ec4bedfe080
[412823.129649] 3800: ffffb1314c613940 00000000000009a1 00000000000009a1 ffffb12579cd3d70
[412823.137548] 3820: 0000000000000000 ffffb13144152af0 ffffb12579cd3d98 ffffb1314c613be0
[412823.145447] 3840: ffffb1306b144bb8 0000ffffaf7f9000 ffff7ec4bedfe080 ffffb13144152af0
[412823.153347] 3860: 0000ffffaf7f8000 ffffb130ff713bd8 ffffb119c0000fc0 ffff7ec4b6a854b0
[412823.161246] 3880: 0000000000000001 0000000000040d00 ffffb1314c6138f0 ffff14a6222dbb0c
[412823.169145] 38a0: ffff7ec4bedfe080 ffffb1314c613940 0000000000000001 ffffb1314c613be0
[412823.177045] 38c0: ffffb1257880ebc8 0000000000000000 ffffb12579cd3d70 0000000000000002
[412823.184944] 38e0: ffff14a623428000 ffff14a62240ebd0 ffffb1314c613910 ffff14a6222dbda4
[412823.192843] 3900: ffff14a623428000 ffff7ec4bedfe080 ffffb1314c613970 ffff14a62229a210
[412823.200743] 3920: ffff7ec4bedfe080 ffffb12579cd3bf8 ffff7ec4a803a280 000000012240e7e8
[412823.208642] 3940: ffffb1314c61393c ffff14a6222d96e0 0000000000000000 0000000000000000
[412823.216541] 3960: ffff14a6222d9340 0000000000040d00 ffffb1314c6139b0 ffff14a6223ed224
[412823.224441] 3980: ffffb1314c613be0 ffff7ec4bedfe080 0000000000000c35 ffffb1314c613be0
[412823.232340] 39a0: ffffb1257880ebc8 00000001000009c0 ffffb1314c6139d0 ffff14a6223ed3e4
[412823.240239] 39c0: ffffb1257880ebc8 00000000000009a2 ffffb1314c613a10 ffff14a6223ed530
[412823.248138] 39e0: ffff7ec4bedfe080 ffffb1314c613ac0 7fffffffffffffeb ffffb1314c613af8
[412823.256038] 3a00: 0000000000000c34 ffff14a6222f5858 ffffb1314c613b00 ffff14a6223f2f60
[412823.263937] 3a20: 0000000004000000 ffffb12579cd3bf8 ffffb1314c613d18 ffff14a623428000
[412823.271836] 3a40: ffffb1314abd1000 ffffb12579cd3d70 ffffb1314abd1580 0000000000000000
[412823.279736] 3a60: 7fffffffffffffff 0000000000000000 00000000000009a9 000000000000000e
[412823.287635] 3a80: 0000000000000000 ffff7ec4b6144ec0 ffff7ec49d3c21c0 ffff7ec4b737c940
[412823.295534] 3aa0: ffff7ec4a02a1580 ffff7ec4bca37140 ffff7ec4a803a280 ffff7ec4bedfe080
[412823.303433] 3ac0: ffff7ec4ae9d6080 ffff7ec4bef06a40 ffff7ec4bde80980 ffff7ec4a0e36380
[412823.311333] 3ae0: ffff7ec4bbd0c0c0 ffff7ec4b7a297c0 ffff7ec4affc3e80 0000000000040d00
[412823.319232] 3b00: ffffb1314c613c50 ffff14a62229cddc ffffb1314c613d18 ffffb12579cd3d70
[412823.327132] 3b20: ffffb12579cd3bf8 ffff14a623428000 ffff14a622299c80 0000000000c34fff
[412823.335031] 3b40: ffffb12c9aeebf00 0000000000000000 0000000000000000 0000000000000000
[412823.342930] 3b60: ffff14a622b34f88 ffff14a622372c18 ffff7ec4adab8f40 0000000000000000
[412823.350829] 3b80: ffffb1314c613bb0 0000000000000000 ffffb1314abd1580 0000000100000000
[412823.358729] 3ba0: 0000000000000000 ffff14a622b34bd0 ffffb1314c613bb0 ffffb1314c613bb0
[412823.366628] 3bc0: ffffb1314c613bc0 ffffb1314c613bc0 ffffb1314c613bd0 ffffb1314c613bd0
[412823.374527] 3be0: ffffb12579cd3bf8 ffffb1314c613d18 00000000000009a1 00000000000009a2
[412823.382427] 3c00: 0000000000000c34 ffff14a6222c8f70 00000000adab8f40 ffffb12579cd3d70
[412823.390326] 3c20: ffffb1314c613d18 ffffb130ff513d00 ffffb1312e0066c0 00000000004e31a1
[412823.398225] 3c40: ffffb1314c613cf0 0000000000040d00 ffffb1314c613cd0 ffff14a62228c66c
[412823.406124] 3c60: ffff14a623428000 ffffb12579cd3d70 ffffb12579cd3bf8 0000000000c34fff
[412823.414024] 3c80: 0000000000000000 ffffb1306b144bb8 0000ffffaf800000 0000000000000040
[412823.421923] 3ca0: ffffb1314c613d60 ffff14a6222ceadc ffffb1314c613cd0 ffff14a62228c660
[412823.429822] 3cc0: ffff14a623428000 0000000000040d00 ffffb1314c613d80 ffff14a62228ce78
[412823.437722] 3ce0: ffffb12579cd3d70 ffffb12579cd3bf8 ffffb12c9aeebf00 0000000000000000
[412823.445621] 3d00: 0000000000c34fff 0000ffffaf804000 ffffb12daa9a1be0 7fffffffffffffeb
[412823.453520] 3d20: 0000000000000000 0000000000000000 0000000000c34fff 0000000000000001
[412823.461420] 3d40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[412823.469319] 3d60: 0000000000000000 0000000000000000 0000000000000000 0000000000040d00
[412823.477218] 3d80: ffffb1314c613dc0 ffff14a6223e1bf0 0000000000000000 ffffb12579cd3bf8
[412823.485118] 3da0: 0000000000000001 ffffb1314abd5800 0000000000000000 ffffb1314c613ec0
[412823.493017] 3dc0: ffffb1314c613e10 ffff14a62236b634 ffffb12c9aeebf00 0000000000000001
[412823.500916] 3de0: 0000000000000000 0000000000c34fff ffffb12c9aeebf00 ffffb12c9afcc068
[412823.508816] 3e00: ffffb12c9afcc000 ffff14a6222d1ac4 ffffb1314c613e50 ffff14a6222d7ff8
[412823.516715] 3e20: 0000ffffafa8c000 0000ffffaee57000 0000ffffafa8c000 0000000000000004
[412823.524614] 3e40: 0000ffffafa8c000 0000000000000006 0000000000000000 ffff14a6220f3930
[412823.532513] 3e60: 0000000000000000 00009c8b3c710000 ffffffffffffffff 0000ffffafbf46e0
[412823.540413] 3e80: 0000000080000000 0000000000000015 0000000000000124 00000000000000e3
[412823.548312] 3ea0: ffff14a622b01000 ffffb1314c43ad00 ffffffffffffffff ffff0000511a9000
[412823.556211] 3ec0: 0000ffffaee57000 0000000000c35000 0000000000000004 0000000000000000
[412823.564111] 3ee0: 0000aaaae3248f66 0000ffffaf8045d5 3670657277613a39 3a472a6f696f643a
[412823.572010] 3f00: 00000000000000e3 696f643a36706572 333639313a472a6f 3670657277613a39
[412823.579909] 3f20: 472a6f696f643a36 613a39333639313a 0000000000000003 0000000000000000
[412823.587809] 3f40: 0000aaaadcd52c80 0000ffffafbf46b8 0000000000000001 0000aaaae3229030
[412823.595708] 3f60: 0000aaaadcd53470 0000ffffffd09a40 0000aaaadcd52000 0000aaaae3210280
[412823.603607] 3f80: 0000000000000001 0000aaaae3229054 0000ffffaee57000 0000000000000006
[412823.611507] 3fa0: 0000ffffffd09a40 0000ffffffd09410 0000aaaadcd38f8c 0000ffffffd09410
[412823.619406] 3fc0: 0000ffffafbf46e0 0000000080000000 0000ffffaee57000 00000000000000e3
[412823.627305] 3fe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[412823.635204] Call trace:
[412823.637722] Exception stack(0xffffb1314c613580 to 0xffffb1314c6136b0)
[412823.644232] 3580: ffffb1314c613850 0001000000000000 ffffb1314c613770 ffff14a6222d8070
[412823.652131] 35a0: 0000000000400145 0000000000000000 0000000000000000 0000000000000000
[412823.660031] 35c0: ffffb1314c6135e0 ffff14a6223028b0 ffffb130ff513d00 ffff14a6223c5bd0
[412823.667930] 35e0: ffffb1314c613620 ffff14a62228e3c8 ffffb1315e007a80 0000000001091220
[412823.675829] 3600: ffffb13156d9be00 0000000001091220 0000000000000000 ffffb13136394f78
[412823.683729] 3620: ffffb1314c613640 ffff14a62228e740 0000000001091220 0000000000040d00
[412823.691628] 3640: 0000000000000001 ffffb119c0000fc0 0000000000000001 0000000000000001
[412823.699527] 3660: ffff14a6222d96e0 01ffff000000107d 0000008000080000 ffff14a623051811
[412823.707427] 3680: 0000000000000001 0000000000000006 ffffb131bffddd00 0000000000000000
[412823.715326] 36a0: ffffffffffffff83 0000000000000040
[412823.720275] [<ffff14a6222d8070>] check_pte+0x20/0x148
[412823.725395] [<ffff14a6222d83dc>] page_vma_mapped_walk+0x244/0x4c0
[412823.731559] [<ffff14a6222d97a0>] page_mkclean_one+0xc0/0x278
[412823.737288] [<ffff14a6222d9a40>] rmap_walk_file+0xe8/0x228
[412823.742844] [<ffff14a6222dbb0c>] rmap_walk+0x64/0xa0
[412823.747878] [<ffff14a6222dbda4>] page_mkclean+0xb4/0xc8
[412823.753175] [<ffff14a62229a210>] clear_page_dirty_for_io+0x80/0x220
[412823.759513] [<ffff14a6223ed224>] mpage_submit_page+0x34/0x90
[412823.765239] [<ffff14a6223ed3e4>] mpage_process_page_bufs+0x164/0x170
[412823.771663] [<ffff14a6223ed530>] mpage_prepare_extent_to_map+0x140/0x2d8
[412823.778434] [<ffff14a6223f2f60>] ext4_writepages+0x3d8/0xcf8
[412823.784163] [<ffff14a62229cddc>] do_writepages+0x5c/0x108
[412823.789632] [<ffff14a62228c66c>] __filemap_fdatawrite_range+0xec/0x128
[412823.796229] [<ffff14a62228ce78>] file_write_and_wait_range+0x58/0xe8
[412823.802653] [<ffff14a6223e1bf0>] ext4_sync_file+0x80/0x468
[412823.808209] [<ffff14a62236b634>] vfs_fsync_range+0x64/0xc0
[412823.813763] [<ffff14a6222d7ff8>] SyS_msync+0x188/0x1e0
[412823.818973] [<ffff14a6220f3930>] el0_svc_naked+0x24/0x28
[412823.824354] Code: aa1e03e0 d503201f b9403260 f9401261 (f9400021)
[412823.830518] ---[ end trace 1d08e28a6fe8dd8e ]---
[412850.810875] watchdog: BUG: soft lockup - CPU#30 stuck for 23s! [doio:19640]

[Test]
Compile LTP and run the following test:
sudo ./runltp -p -f fs -s rwtest

[Fix]
The following patch posted to linux-arm-kernel fixes this issue.
http://lists.infradead.org/pipermail/linux-arm-kernel/2017-September/533623.html

[Regression Potential]
This patch applies to ARM64 and does not impact any other architecture. Regression potential none.

See original description

Tags:

CVE References

2017-1000252

Revision history for this message

Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote on 2017-10-03: Missing required logs.

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1721067

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status:	New → Incomplete
tags:	added: artful

Manoj Iyer (manjo) on 2017-10-03

description:

updated

Manoj Iyer (manjo) on 2017-10-03

summary:

- [zesty][Artful] ltp rwtest - Unable to handle kernel paging request at
- virtual address
+ [Artful] ltp rwtest - Unable to handle kernel paging request at virtual
+ address

Revision history for this message

Manoj Iyer (manjo) wrote on 2017-10-03:

Download full text (7.0 KiB)

== After the patch ==
After applying the patch the test does not crash the kernel, the test completes as expected with all tests passing.

ubuntu@XXX:~$ uname -a
Linux XXX 4.13.0-13-generic #14~pgtable+build.1 SMP Tue Oct 3 18:05:38 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux

$ sudo ./runltp -p -f fs -s rwtest
INFO: creating /opt/ltp/output directory
INFO: creating /opt/ltp/results directory
Checking for required user/group ids

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=17.10
DISTRIB_CODENAME=artful
DISTRIB_DESCRIPTION="Ubuntu Artful Aardvark (development branch)"
NAME="Ubuntu"
VERSION="17.10 (Artful Aardvark)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu Artful Aardvark (development branch)"
VERSION_ID="17.10"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=artful
UBUNTU_CODENAME=artful
Linux awrep6 4.13.0-13-generic #14~pgtable+build.1 SMP Tue Oct 3 18:05:38 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux

Gnu C gcc (Ubuntu/Linaro 7.2.0-7ubuntu1) 7.2.0
Gnu make 4.1
util-linux linux 2.30.1
mount linux 2.30.1 (libmount 2.30.1: selinux, btrfs, assert, debug)
modutils 24
e2fsprogs 1.43.5
Linux C Library > libc.2.26
Dynamic linker (ldd) 2.26
Procps 3.3.12
Net-tools 2.10-alpha
iproute2 iproute2-ss161212
Kbd 2.0.3
Sh-utils 8.26
Modules Loaded nls_iso8859_1 ipmi_ssif cppc_cpufreq shpchp tpm_crb ipmi_devintf ipmi_msghandler hdma_mgmt hdma i2c_qup ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage at803x aes_ce_blk aes_ce_cipher crc32_ce mlx5_core crct10dif_ce ghash_ce sha2_ce sha1_ce mlxfw devlink ptp pps_core ahci_platform libahci_platform libahci qcom_emac sdhci_acpi sdhci xhci_plat_hcd aes_neon_bs aes_neon_blk crypto_simd cryptd

free reports:
total used free shared buff/cache available
Mem: 98853816 633832 97987408 18964 232576 97479284
Swap: 8388604 0 8388604

== After the patch ==
After applying the patch the test does not crash the kernel, the test completes as expected with all tests passing.

ubuntu@XXX:~$ uname -a 
Linux XXX 4.13.0-13-generic #14~pgtable+build.1 SMP Tue Oct 3 18:05:38 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux

$ sudo ./runltp -p -f fs -s rwtest
INFO: creating /opt/ltp/output directory
INFO: creating /opt/ltp/results directory
Checking for required user/group ids

'nobody' user id and group found.
'bin' user id and group found.
'daemon' user id and group found.
Users group found.
Sys group found.
Required users/groups exist.
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=17.10
DISTRIB_CODENAME=artful
DISTRIB_DESCRIPTION="Ubuntu Artful Aardvark (development branch)"
NAME="Ubuntu"
VERSION="17.10 (Artful Aardvark)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu Artful Aardvark (development branch)"
VERSION_ID="17.10"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=artful
UBUNTU_CODENAME=artful
Linux awrep6 4.13.0-13-generic #14~pgtable+build.1 SMP Tue Oct 3 18:05:38 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux
 
Gnu C                  gcc (Ubuntu/Linaro 7.2.0-7ubuntu1) 7.2.0
Gnu make               4.1
util-linux             linux 2.30.1
mount                  linux 2.30.1 (libmount 2.30.1: selinux, btrfs, assert, debug)
modutils               24
e2fsprogs              1.43.5
Linux C Library        > libc.2.26
Dynamic linker (ldd)   2.26
Procps                 3.3.12
Net-tools              2.10-alpha
iproute2              iproute2-ss161212
Kbd                    2.0.3
Sh-utils               8.26
Modules Loaded         nls_iso8859_1 ipmi_ssif cppc_cpufreq shpchp tpm_crb ipmi_devintf ipmi_msghandler hdma_mgmt hdma i2c_qup ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage at803x aes_ce_blk aes_ce_cipher crc32_ce mlx5_core crct10dif_ce ghash_ce sha2_ce sha1_ce mlxfw devlink ptp pps_core ahci_platform libahci_platform libahci qcom_emac sdhci_acpi sdhci xhci_plat_hcd aes_neon_bs aes_neon_blk crypto_simd cryptd

free reports:
              total        used        free      shared  buff/cache   available
Mem:       98853816      633832    97987408       18964      232576    97479284
Swap:       8388604           0     8388604

no big block device was specified on commandline.
Tests which require a big block device are disabled.
You can specify it with option -z
COMMAND:    /opt/ltp/bin/ltp-pan  -e -S   -a 2170     -n 2170  -p  -f /tmp/ltp-JrFEc0NFH8/alltests -l /opt/ltp/results/LTP_RUN_ON-2017_10_03-19h_17m_56s.log  -C /opt/ltp/output/LTP_RUN_ON-2017_10_03-19h_17m_56s.failed -T /opt/ltp/output/LTP_RUN_ON-2017_10_03-19h_17m_56s.tconf
INFO: Restricted to rwtest
LOG File: /opt/ltp/results/LTP_RUN_ON-2017_10_03-19h_17m_56s.log
FAILED COMMAND File: /opt/ltp/output/LTP_RUN_ON-2017_10_03-19h_17m_56s.failed
TCONF COMMAND File: /opt/ltp/output/LTP_RUN_ON-2017_10_03-19h_17m_56s.tconf
Running tests.......
<<<test_start>>>
tag=rwtest01 stime=1507058278
cmdline="export LTPROOT; rwtest -N rwtest01 -c -q -i 60s  -f sync 10%25000:$TMPDIR/rw-sync-$$"
contacts=""
analysis=exit
<<<test_output>>>
rwtest01    1  TPASS  :  Test passed
Test passed
<<<execution_status>>>
initiation_status="ok"
duration=65 termination_type=exited termination_id=0 corefile=no
cutime=7 cstime=62
<<<test_end>>>
<<<test_start>>>
tag=rwtest02 stime=1507058343
cmdline="export LTPROOT; rwtest -N rwtest02 -c -q -i 60s  -f buffered 10%25000:$TMPDIR/rw-buffered-$$"
contacts=""
analysis=exit
<<<test_output>>>
rwtest02    1  TPASS  :  Test passed
Test passed
<<<execution_status>>>
initiation_status="ok"
duration=61 termination_type=exited termination_id=0 corefile=no
cutime=1472 cstime=5226
<<<test_end>>>
<<<test_start>>>
tag=rwtest03 stime=1507058404
cmdline="export LTPROOT; rwtest -N rwtest03 -c -q -i 60s -n 2  -f buffered -s mmread,mmwrite -m random -Dv 10%25000:$TMPDIR/mm-buff-$$"
contacts=""
analysis=exit
<<<test_output>>>
rwtest03    1  TPASS  :  Test passed
Test passed
<<<execution_status>>>
initiation_status="ok"
duration=62 termination_type=exited termination_id=0 corefile=no
cutime=58 cstime=440
<<<test_end>>>
<<<test_start>>>
tag=rwtest04 stime=1507058466
cmdline="export LTPROOT; rwtest -N rwtest04 -c -q -i 60s -n 2  -f sync -s mmread,mmwrite -m random -Dv 10%25000:$TMPDIR/mm-sync-$$"
contacts=""
analysis=exit
<<<test_output>>>
rwtest04    1  TPASS  :  Test passed
Test passed
<<<execution_status>>>
initiation_status="ok"
duration=62 termination_type=exited termination_id=0 corefile=no
cutime=50 cstime=449
<<<test_end>>>
<<<test_start>>>
tag=rwtest05 stime=1507058528
cmdline="export LTPROOT; rwtest -N rwtest05 -c -q -i 50 -T 64b 500b:$TMPDIR/rwtest01%s"
contacts=""
analysis=exit
<<<test_output>>>
rwtest05    1  TPASS  :  Test passed
Test passed
<<<execution_status>>>
initiation_status="ok"
duration=0 termination_type=exited termination_id=0 corefile=no
cutime=1 cstime=2
<<<test_end>>>
<<<test_start>>>
tag=iogen01 stime=1507058528
cmdline="export LTPROOT; rwtest -N iogen01 -i 120s -s read,write -Da -Dv -n 2 500b:$TMPDIR/doio.f1.$$ 1000b:$TMPDIR/doio.f2.$$"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
/opt/ltp/testcases/bin/iogen -N iogen01 -i 120s -s read,write 500b:/tmp/ltp-JrFEc0NFH8/doio.f1.2386 1000b:/tmp/ltp-JrFEc0NFH8/doio.f2.2386 | /opt/ltp/testcases/bin/doio -N iogen01 -a -v -n 2 -k

iogen(iogen01) starting up with the following:

Out-pipe:              stdout
Iterations:            120 seconds
Seed:                  2393
Offset-Mode:           sequential
Overlap Flag:          off
Mintrans:              1           (1 blocks)
Maxtrans:              131072      (256 blocks)
O_RAW/O_SSD Multiple:  (Determined by device)
Syscalls:              read write 
Aio completion types:  none 
Flags:                 buffered sync

Test Files:

Path                                          Length    iou   raw iou file
                                              (bytes) (bytes) (bytes) type
-----------------------------------------------------------------------------
/tmp/ltp-JrFEc0NFH8/doio.f1.2386               256000       1     512 regular
/tmp/ltp-JrFEc0NFH8/doio.f2.2386               512000       1     512 regular
iogen01     1  TPASS  :  Test passed
Test passed
<<<execution_status>>>
initiation_status="ok"
duration=123 termination_type=exited termination_id=0 corefile=no
cutime=16 cstime=111
<<<test_end>>>
INFO: ltp-pan reported all tests PASS
LTP Version: 20170516

###############################################################

Done executing testcases.
            LTP Version:  20170516
       ###############################################################

Seth Forshee (sforshee) on 2017-10-03

Changed in linux (Ubuntu Artful):
status:	Incomplete → Fix Committed

Revision history for this message

Launchpad Janitor (janitor) wrote on 2017-10-11:

Download full text (16.2 KiB)

This bug was fixed in the package linux - 4.13.0-15.16

---------------
linux (4.13.0-15.16) artful; urgency=low

* linux: 4.13.0-15.16 -proposed tracker (LP: #1721373)

  * Boot regression on POWER9 (LP: #1721391)
    - Revert "crypto/nx: Add P9 NX support for 842 compression engine"
    - Revert "crypto/nx: Add P9 NX specific error codes for 842 engine"
    - Revert "crypto/nx: Use kzalloc for workmem allocation"
    - Revert "crypto/nx: Add nx842_add_coprocs_list function"
    - Revert "crypto/nx: Create nx842_delete_coprocs function"
    - Revert "crypto/nx: Create nx842_configure_crb function"
    - Revert "crypto/nx: Rename nx842_powernv_function as icswx function"
    - Revert "UBUNTU: [Config] CONFIG_PPC_VAS=y"
    - Revert "powerpc/powernv/vas: Define copy/paste interfaces"
    - Revert "powerpc/powernv/vas: Define vas_tx_win_open()"
    - Revert "powerpc/powernv/vas: Define vas_win_close() interface"
    - Revert "powerpc/powernv/vas: Define vas_rx_win_open() interface"
    - Revert "powerpc/powernv/vas: Define helpers to alloc/free windows"
    - Revert "powerpc/powernv/vas: Define helpers to init window context"
    - Revert "powerpc/powernv/vas: Define helpers to access MMIO regions"
    - Revert "powerpc/powernv/vas: Define vas_init() and vas_exit()"
    - Revert "powerpc/powernv: Move GET_FIELD/SET_FIELD to vas.h"
    - Revert "powerpc/powernv/vas: Define macros, register fields and structures"
    - Revert "powerpc/powernv: Enable PCI peer-to-peer"
    - Revert "powerpc/powernv: Add support to set power-shifting-ratio"
    - Revert "powerpc/powernv: Add support for powercap framework"
    - Revert "powerpc/perf: Add nest IMC PMU support"
    - Revert "powerpc/powernv: Detect and create IMC device"
    - Revert "powerpc/powernv: Add IMC OPAL APIs"

  * smartpqi patches for Artful (LP: #1721381)
    - scsi: smartpqi: add pqi reset quiesce support
    - scsi: smartpqi: enhance BMIC cache flush
    - scsi: smartpqi: update pqi passthru ioctl
    - scsi: smartpqi: cleanup doorbell register usage.
    - scsi: smartpqi: update kexec and power down support
    - scsi: smartpqi: add in new controller ids
    - scsi: smartpqi: change driver version to 1.1.2-125

  * CONFIG_DEBUG_FS is not enabled by "make zfcpdump_defconfig" with Ubuntu
    17.10 (kernel 4.13) (LP: #1719290)
    - SAUCE: s390: update zfcpdump_defconfig

* [Feature] PXE boot with Intel Omni-Path (LP: #1712031)
- d-i: Add hfi1 to nic-modules

* [Feature]CNL:New device IDs for CNL (LP: #1685729)
- pinctrl: intel: Add Intel Cannon Lake PCH-H pin controller support

linux (4.13.0-14.15) artful; urgency=low

* linux: 4.13.0-14.15 -proposed tracker (LP: #1721122)

  * [Artful] ltp rwtest - Unable to handle kernel paging request at virtual
    address (LP: #1721067)
    - arm64: mm: Use READ_ONCE when dereferencing pointer to pte table

* linux 4.13.0-13.14 ADT test failure with linux 4.13.0-13.14 (LP: #1720779)
- SAUCE: LSM stacking: check for invalid zero sized writes

* Add installer support for Broadcom BCM573xx network drivers. (LP: #1720466)
- d-i: Add bnxt_en to nic-modules.

* Miscellaneous Ubuntu changes
- [Packaging] Include arch/arm6...

This bug was fixed in the package linux - 4.13.0-15.16

---------------
linux (4.13.0-15.16) artful; urgency=low

* linux: 4.13.0-15.16 -proposed tracker (LP: #1721373)

* CONFIG_DEBUG_FS is not enabled by "make zfcpdump_defconfig" with Ubuntu
    17.10 (kernel 4.13) (LP: #1719290)
    - SAUCE: s390: update zfcpdump_defconfig

* [Feature] PXE boot with Intel Omni-Path (LP: #1712031)
    - d-i: Add hfi1 to nic-modules

* [Feature]CNL:New device IDs for CNL (LP: #1685729)
    - pinctrl: intel: Add Intel Cannon Lake PCH-H pin controller support

linux (4.13.0-14.15) artful; urgency=low

* linux: 4.13.0-14.15 -proposed tracker (LP: #1721122)

* [Artful] ltp rwtest - Unable to handle kernel paging request at virtual
    address (LP: #1721067)
    - arm64: mm: Use READ_ONCE when dereferencing pointer to pte table

* linux 4.13.0-13.14 ADT test failure with linux 4.13.0-13.14 (LP: #1720779)
    - SAUCE: LSM stacking: check for invalid zero sized writes

* Add installer support for Broadcom BCM573xx network drivers. (LP: #1720466)
    - d-i: Add bnxt_en to nic-modules.

* Miscellaneous Ubuntu changes
    - [Packaging] Include arch/arm64/kernel/ftrace-mod.o in headers package

linux (4.13.0-13.14) artful; urgency=low

* linux: 4.13.0-13.14 -proposed tracker (LP: #1720239)

* [Bug] USB 3.1 Gen2 works as 5Gbps (LP: #1720045)
    - xhci: set missing SuperSpeedPlus Link Protocol bit in roothub descriptor

* [Feature]Memory Bandwidth Monitoring(MBM) port to new Cache Quality
    Monitoring (CQM) (LP: #1591609)
    - x86/perf/cqm: Wipe out perf based cqm
    - x86/intel_rdt/cqm: Documentation for resctrl based RDT Monitoring
    - x86/intel_rdt: Introduce a common compile option for RDT
    - x86/intel_rdt: Change file names to accommodate RDT monitor code
    - x86/intel_rdt: Mark rdt_root and closid_alloc as static
    - x86/intel_rdt: Cleanup namespace to support RDT monitoring
    - x86/intel_rdt: Make rdt_resources_all more readable
    - x86/intel_rdt/cqm: Add RDT monitoring initialization
    - x86/intel_rdt/cqm: Add RMID (Resource monitoring ID) management
    - x86/intel_rdt: Simplify info and base file lists
    - x86/intel_rdt/cqm: Add info files for RDT monitoring
    - x86/intel_rdt: Prepare for RDT monitoring mkdir support
    - x86/intel_rdt/cqm: Add mkdir support for RDT monitoring
    - x86/intel_rdt: Change closid type from int to u32
    - x86/intel_rdt/cqm: Add tasks file support
    - x86/intel_rdt: Prepare to add RDT monitor cpus file support
    - x86/intel_rdt/cqm: Add cpus file support
    - x86/intel_rdt: Prepare for RDT monitor data support
    - x86/intel_rdt/cqm: Add mon_data
    - x86/intel_rdt: Separate the ctrl bits from rmdir
    - x86/intel_rdt/cqm: Add rmdir support
    - x86/intel_rdt/cqm: Add mount,umount support
    - x86/intel_rdt: Introduce rdt_enable_key for scheduling
    - x86/intel_rdt/cqm: Add sched_in support
    - x86/intel_rdt/cqm: Add CPU hotplug support
    - x86/intel_rdt/mbm: Basic counting of MBM events (total and local)
    - x86/intel_rdt/mbm: Add mbm counter initialization
    - x86/intel_rdt/mbm: Handle counter overflow
    - x86/intel_rdt: Show bitmask of shareable resource with other executing units
    - x86/intel_rdt/cqm: Clear the default RMID during hotcpu
    - x86/intel_rdt: Modify the intel_pqr_state for better performance
    - x86/intel_rdt/mbm: Fix MBM overflow handler during CPU hotplug
    - x86/intel_rdt/cqm: Improve limbo list processing
    - x86/intel_rdt: Remove redundant ternary operator on return
    - [Config] CONFIG_INTEL_RDT=y

* [Feature] RDT: Disable most RDT features on Skylake server (LP: #1713619)
    - x86/intel_rdt: Move special case code for Haswell to a quirk function
    - x86/intel_rdt: Add command line options for resource director technology
    - x86/intel_rdt: Turn off most RDT features on Skylake

* CVE-2017-1000252
    - KVM: VMX: Do not BUG() on out-of-bounds guest IRQ

* POWER9: NX842 module changes (LP: #1718292)
    - crypto/nx: Rename nx842_powernv_function as icswx function
    - crypto/nx: Create nx842_configure_crb function
    - crypto/nx: Create nx842_delete_coprocs function
    - crypto/nx: Add nx842_add_coprocs_list function
    - crypto/nx: Use kzalloc for workmem allocation
    - crypto/nx: Add P9 NX specific error codes for 842 engine
    - crypto/nx: Add P9 NX support for 842 compression engine

* [Ubuntu 17.10] POWER9 - Base - Integrate P9 VAS (Virtual Accelerator
    Switchboard) support in kernel (LP: #1718293)
    - powerpc/powernv: Add IMC OPAL APIs
    - powerpc/powernv: Detect and create IMC device
    - powerpc/perf: Add nest IMC PMU support
    - powerpc/powernv: Add support for powercap framework
    - powerpc/powernv: Add support to set power-shifting-ratio
    - powerpc/powernv: Enable PCI peer-to-peer
    - powerpc/powernv/vas: Define macros, register fields and structures
    - powerpc/powernv: Move GET_FIELD/SET_FIELD to vas.h
    - powerpc/powernv/vas: Define vas_init() and vas_exit()
    - powerpc/powernv/vas: Define helpers to access MMIO regions
    - powerpc/powernv/vas: Define helpers to init window context
    - powerpc/powernv/vas: Define helpers to alloc/free windows
    - powerpc/powernv/vas: Define vas_rx_win_open() interface
    - powerpc/powernv/vas: Define vas_win_close() interface
    - powerpc/powernv/vas: Define vas_tx_win_open()
    - powerpc/powernv/vas: Define copy/paste interfaces
    - [Config] CONFIG_PPC_VAS=y

* Artful update to v4.13.4 stable release (LP: #1720154)
    - orangefs: Don't clear SGID when inheriting ACLs
    - <linux/uaccess.h>: Fix copy_in_user() declaration
    - IB/hfi1: Revert egress pkey check enforcement
    - IB/{qib, hfi1}: Avoid flow control testing for RDMA write operation
    - IB/mlx5: Fix cached MR allocation flow
    - srcu: Provide ordering for CPU not involved in grace period
    - smp/hotplug: Handle removal correctly in cpuhp_store_callbacks()
    - Input: xpad - validate USB endpoint type during probe
    - drm/amdgpu: read reg in each iterator of psp_wait_for loop
    - tty: improve tty_insert_flip_char() fast path
    - tty: improve tty_insert_flip_char() slow path
    - tty: fix __tty_insert_flip_char regression
    - pinctrl: samsung: Fix invalid register offset used for Exynos5433 external
      interrupts
    - pinctrl: samsung: Fix NULL pointer exception on external interrupts on
      S3C24xx
    - pinctrl/amd: save pin registers over suspend/resume
    - MIPS: math-emu: <MAX|MAXA|MIN|MINA>.<D|S>: Fix quiet NaN propagation
    - MIPS: math-emu: <MAX|MAXA|MIN|MINA>.<D|S>: Fix cases of both inputs zero
    - MIPS: math-emu: <MAX|MIN>.<D|S>: Fix cases of both inputs negative
    - MIPS: math-emu: <MAXA|MINA>.<D|S>: Fix cases of input values with opposite
      signs
    - MIPS: math-emu: <MAXA|MINA>.<D|S>: Fix cases of both infinite inputs
    - MIPS: math-emu: MINA.<D|S>: Fix some cases of infinity and zero inputs
    - MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Fix NaN propagation
    - MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Fix some cases of infinite inputs
    - MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Fix some cases of zero inputs
    - MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Clean up "maddf_flags" enumeration
    - MIPS: math-emu: <MADDF|MSUBF>.S: Fix accuracy (32-bit case)
    - MIPS: math-emu: <MADDF|MSUBF>.D: Fix accuracy (64-bit case)
    - docs: disable KASLR when debugging kernel
    - crypto: ccp - Fix XTS-AES-128 support on v5 CCPs
    - crypto: scompress - don't sleep with preemption disabled
    - crypto: caam/qi - fix typo in authenc alg driver name
    - crypto: caam/qi - properly set IV after {en,de}crypt
    - crypto: AF_ALG - remove SGL terminator indicator when chaining
    - regulator: cpcap: Fix standby mode
    - wcn36xx: Introduce mutual exclusion of fw configuration
    - ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets
    - ext4: fix incorrect quotaoff if the quota feature is enabled
    - ext4: fix quota inconsistency during orphan cleanup for read-only mounts
    - cxl: Fix driver use count
    - powerpc/powernv/npu: Move tlb flush before launching ATSD
    - powerpc/pseries: Don't attempt to acquire drc during memory hot add for
      assigned lmbs
    - powerpc: Fix DAR reporting when alignment handler faults
    - block: Relax a check in blk_start_queue()
    - block: directly insert blk-mq request from blk_insert_cloned_request()
    - md/bitmap: copy correct data for bitmap super
    - md/bitmap: disable bitmap_resize for file-backed bitmaps.
    - skd: Avoid that module unloading triggers a use-after-free
    - skd: Submit requests to firmware before triggering the doorbell
    - scsi: zfcp: fix queuecommand for scsi_eh commands when DIX enabled
    - scsi: zfcp: add handling for FCP_RESID_OVER to the fcp ingress path
    - scsi: zfcp: fix capping of unsuccessful GPN_FT SAN response trace records
    - scsi: zfcp: fix passing fsf_req to SCSI trace on TMF to correlate with HBA
    - scsi: zfcp: fix missing trace records for early returns in TMF eh handlers
    - scsi: zfcp: fix payload with full FCP_RSP IU in SCSI trace records
    - scsi: zfcp: trace HBA FSF response by default on dismiss or timedout late
      response
    - scsi: zfcp: trace high part of "new" 64 bit SCSI LUN
    - scsi: qedi: off by one in qedi_get_cmd_from_tid()
    - scsi: aacraid: Fix command send race condition
    - scsi: megaraid_sas: mismatch of allocated MFI frame size and length exposed
      in MFI MPT pass through command
    - scsi: megaraid_sas: set minimum value of resetwaittime to be 1 secs
    - scsi: megaraid_sas: Check valid aen class range to avoid kernel panic
    - scsi: megaraid_sas: Return pended IOCTLs with cmd_status
      MFI_STAT_WRONG_STATE in case adapter is dead
    - scsi: storvsc: fix memory leak on ring buffer busy
    - scsi: sg: factor out sg_fill_request_table()
    - scsi: sg: fixup infoleak when using SG_GET_REQUEST_TABLE
    - scsi: qla2xxx: Update fw_started flags at qpair creation.
    - scsi: qla2xxx: Correction to vha->vref_count timeout
    - scsi: qla2xxx: Fix target multiqueue configuration
    - scsi: qla2xxx: Use BIT_6 to acquire FAWWPN from switch
    - scsi: qla2xxx: Use fabric name for Get Port Speed command
    - scsi: qla2xxx: Fix an integer overflow in sysfs code
    - mailbox: bcm-flexrm-mailbox: Fix mask used in CMPL_START_ADDR_VALUE()
    - ftrace: Fix debug preempt config name in stack_tracer_{en,dis}able
    - ftrace: Fix selftest goto location on error
    - ftrace: Fix memleak when unregistering dynamic ops when tracing disabled
    - tracing: Add barrier to trace_printk() buffer nesting modification
    - tracing: Fix clear of RECORDED_TGID flag when disabling trace event
    - tracing: Apply trace_clock changes to instance max buffer
    - ARC: Re-enable MMU upon Machine Check exception
    - PCI: shpchp: Enable bridge bus mastering if MSI is enabled
    - PCI: pciehp: Report power fault only once until we clear it
    - net/netfilter/nf_conntrack_core: Fix net_conntrack_lock()
    - media: v4l2-compat-ioctl32: Fix timespec conversion
    - media: Revert "[media] lirc_dev: remove superfluous get/put_device() calls"
    - media: venus: fix copy/paste error in return_buf_error
    - media: uvcvideo: Prevent heap overflow when accessing mapped controls
    - media: adv7180: add missing adv7180cp, adv7180st i2c device IDs
    - PM / devfreq: Fix memory leak when fail to register device
    - ALSA: seq: Cancel pending autoload work at unbinding device
    - bcache: initialize dirty stripes in flash_dev_run()
    - bcache: Fix leak of bdev reference
    - bcache: do not subtract sectors_to_gc for bypassed IO
    - bcache: correct cache_dirty_target in __update_writeback_rate()
    - bcache: Correct return value for sysfs attach errors
    - bcache: fix sequential large write IO bypass
    - bcache: fix for gc and write-back race
    - bcache: fix bch_hprint crash and improve output
    - sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs
    - iwlwifi: add workaround to disable wide channels in 5GHz
    - Linux 4.13.4

* [17.10 FEAT] KVM: CPU Model z14 (LP: #1719297)
    - KVM: s390: Support Configuration z/Architecture Mode

* sata reset hangs w/ early cn99xx silicon (LP: #1719031)
    - SAUCE: ahci: thunderx2: Fix for errata that affects stop engine
    - SAUCE: ahci: thunderx2: stop engine fix update

* PCI quirk required for SATA on early cn99xx silicon (LP: #1718760)
    - SAUCE: PCI: Vulcan: AHCI PCI bar fix for Broadcom Vulcan early silicon

* Please make linux-libc-dev Provide: aufs-dev (LP: #1716091)
    - [Packaging] Add aufs-dev to the Provides: for linux-libc-dev

* Miscellaneous Ubuntu changes
    - [Packaging] Use SRCPKGNAME rather than hard-coding the source package name
    - SAUCE: LSM stacking: procfs: add smack subdir to attrs
    - SAUCE: LSM stacking: LSM: manage credential security blobs
    - SAUCE: LSM stacking: LSM: Manage file security blobs
    - SAUCE: LSM stacking: LSM: manage task security blobs
    - SAUCE: LSM stacking: LSM: Infrastructure management of the remaining blobs
    - SAUCE: LSM stacking: LSM: general but not extreme module stacking
    - SAUCE: LSM stacking: LSM: Complete task_alloc hook
    - SAUCE: LSM stacking: fixup procsfs: add smack subdir to attrs
    - SAUCE: LSM stacking: fixup initialize task->security
    - SAUCE: LSM stacking: fixup: alloc_task_ctx is dead code
    - SAUCE: LSM stacking: add support for stacking getpeersec_stream
    - SAUCE: LSM stacking: add stacking support to apparmor network hooks
    - SAUCE: LSM stacking: fixup apparmor stacking enablement
    - SAUCE: LSM stacking: fixup stacking kconfig
    - SAUCE: LSM stacking: allow selecting multiple LSMs using kernel boot params
    - SAUCE: LSM stacking: provide prctl interface for setting context
    - SAUCE: LSM stacking: inherit current display LSM
    - SAUCE: LSM stacking: keep an index for each registered LSM
    - SAUCE: LSM stacking: verify display LSM
    - SAUCE: LSM stacking: provide a way to specify the default display lsm
    - SAUCE: LSM stacking: make sure LSM blob align on 64 bit boundaries
    - SAUCE: LSM stacking: add /proc/<pid>/attr/display_lsm
    - SAUCE: LSM stacking: add Kconfig to set default display LSM
    - SAUCE: LSM stacking: add configs for LSM stacking
    - [Config] Run updateconfigs after merging LSM stacking

-- Seth Forshee <seth.forshee@canonical.com>  Wed, 04 Oct 2017 16:21:48 -0500

Changed in linux (Ubuntu Artful):
status:	Fix Committed → Fix Released

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[Artful] ltp rwtest - Unable to handle kernel paging request at virtual address

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