The BUG statement which triggers here seems to be introduced by
commit 723cacb
Author: Gerald Schaefer <gerald.schae...@de.ibm.com>
Date: Fri Apr 15 16:38:40 2016 +0200
s390/mm: fix asce_bits handling with dynamic pagetable levels
and will be modified by
commit 1aea9b3
Author: Martin Schwidefsky <schwidef...@de.ibm.com>
Date: Mon Apr 24 18:19:10 2017 +0200
s390/mm: implement 5 level pages tables
Maybe this only happens in certain cases which we do not always hit or
4.12 contains something which starts to use the upgrade incorrectly.
Otherwise we should have observed something like this since Yakkety
(4.8).
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https://bugs.launchpad.net/bugs/1712724
Title:
s390 zKVM complains about "illegal operation" to s390/mm/pgalloc.c
Status in linux package in Ubuntu:
Incomplete
Bug description:
[ 543.516708] kernel BUG at
/build/linux-a7axPg/linux-4.12.0/arch/s390/mm/pgalloc.c:84!
[ 543.516783] illegal operation: 0001 ilc:1 [#1] SMP
[ 543.516785] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat xt_tcpudp bridge stp llc iptable_filter
openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack binfmt_misc zfs(PO) zunicode(PO)
zavl(PO) zcommon(PO) znvpair(PO) spl(O) vfio_ccw vfio_mdev mdev
vfio_iommu_type1 vfio ib_iser rdma_cm iw_cm ib_cm ib_core nfsd iscsi_tcp
auth_rpcgss nfs_acl lockd grace libiscsi_tcp libiscsi sunrpc
scsi_transport_iscsi ip_tables x_tables btrfs zlib_deflate raid10 raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq
libcrc32c raid1 raid0 linear ghash_s390 prng aes_s390 des_s390 des_generic
sha512_s390 sha256_s390 virtio_net sha1_s390 sha_common virtio_blk virtio_scsi
[ 543.516828] CPU: 0 PID: 10024 Comm: task-size-overr Tainted: P O
4.12.0-12-generic #13-Ubuntu
[ 543.516829] Hardware name: IBM 2964 N63 400 (KVM/Linux)
[ 543.516830] task: 000000000cdb9e00 task.stack: 00000000099e8000
[ 543.516831] Krnl PSW : 0704d00180000000 00000000001274ec
(crst_table_upgrade+0x124/0x130)
[ 543.516841] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0
RI:0 EA:3
[ 543.516842] Krnl GPRS: 0000000000010000 0000040000000000 00000000243d7800
0020000000000000
[ 543.516843] 0000000000001000 0000000000000000 0000000000000032
0000000000000000
[ 543.516844] 0000000080000000 0020000000000000 0000000000000000
0000000000001000
[ 543.516845] 0020000000000000 00000000243d7800 00000000001239f6
00000000099ebbe0
[ 543.516853] Krnl Code: 00000000001274de: c0e5002446c1 brasl
%r14,5b0260
[ 543.516853] 00000000001274e4: a7f4ffb8 brc
15,127454
[ 543.516853] #00000000001274e8: a7f40001 brc
15,1274ea
[ 543.516853] >00000000001274ec: a728fff4 lhi %r2,-12
[ 543.516853] 00000000001274f0: a7f4ffee brc
15,1274cc
[ 543.516853] 00000000001274f4: 0707 bcr 0,%r7
[ 543.516853] 00000000001274f6: 0707 bcr 0,%r7
[ 543.516853] 00000000001274f8: c00400000000 brcl 0,1274f8
[ 543.516862] Call Trace:
[ 543.516864] ([<00000000085d8578>] 0x85d8578)
[ 543.516868] [<00000000002f529a>] get_unmapped_area+0x72/0x120
[ 543.516870] [<00000000002f931a>] do_mmap+0xfa/0x3e0
[ 543.516873] [<00000000002d6292>] vm_mmap_pgoff+0xca/0x120
[ 543.516874] [<00000000002f6962>] SyS_mmap_pgoff+0x10a/0x2a0
[ 543.516875] [<00000000002f6b72>] SyS_old_mmap+0x7a/0xa8
[ 543.516880] [<0000000000864c1c>] system_call+0xc4/0x27c
[ 543.516881] Last Breaking-Event-Address:
[ 543.516882] [<00000000001274e8>] crst_table_upgrade+0x120/0x130
[ 543.516883]
[ 543.516883] ---[ end trace 036f94bf79a83905 ]---
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.12.0-12-generic 4.12.0-12.13
ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8
Uname: Linux 4.12.0-12-generic s390x
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.6-0ubuntu6
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
Date: Thu Aug 24 05:01:08 2017
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:
ProcEnviron:
TERM=vt220
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C
SHELL=/bin/bash
ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=UUID=d86dc8de-6ac8-4e4b-aba8-92872a209a8c
crashkernel=196M
RelatedPackageVersions:
linux-restricted-modules-4.12.0-12-generic N/A
linux-backports-modules-4.12.0-12-generic N/A
linux-firmware 1.167
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
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