** Changed in: linux (Ubuntu Disco)
Status: Triaged => Fix Committed
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https://bugs.launchpad.net/bugs/1811259
Title:
4.20 kernel on s390x VM crashes
Status in Linux:
Fix Released
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Bug description:
Booting with 4.20.0-2-generic on a s390x 2 CPU VM we hit a panic:
[ 0.394835] Linux version 4.20.0-2-generic (buildd@bos02-s390x-015) (gcc
version 8.2.0 (Ubuntu 8.2.0-13ubuntu1)) #3-Ubuntu SMP Thu Jan 3 18:43:01 UTC
2019 (Ubuntu 4.20.0-2.3-generic 4.20.0)
[ 0.394838] setup.289988: Linux is running under KVM in 64-bit mode
[ 0.394846] setup.b050d0: The maximum memory size is 2048MB
[ 0.394866] numa.196305: NUMA mode: plain
[ 0.394893] cpu.33a262: 2 configured CPUs, 0 standby CPUs
[ 0.394999] Write protected kernel read-only data: 10464k
[ 0.395034] Zone ranges:
[ 0.395035] DMA [mem 0x0000000000000000-0x000000007fffffff]
[ 0.395037] Normal empty
[ 0.395038] Movable zone start for each node
[ 0.395039] Early memory node ranges
[ 0.395041] node 0: [mem 0x0000000000000000-0x000000007fffffff]
[ 0.395042] Initmem setup node 0 [mem
0x0000000000000000-0x000000007fffffff]
[ 0.413802] percpu: Embedded 25 pages/cpu @(____ptrval____) s62208 r8192
d32000 u102400
[ 0.413824] Built 1 zonelists, mobility grouping on. Total pages: 516096
[ 0.413825] Policy zone: DMA
[ 0.413827] Kernel command line: root=LABEL=cloudimg-rootfs
[ 0.450276] Memory: 2034164K/2097152K available (8116K kernel code, 1079K
rwdata, 2344K rodata, 992K init, 772K bss, 62988K reserved, 0K cma-reserved)
[ 0.450283] random: get_random_u64 called from kmem_cache_open+0x4c/0x4f0
with crng_init=0
[ 0.450432] SLUB: HWalign=256, Order=0-3, MinObjects=0, CPUs=3, Nodes=1
[ 0.450434] ftrace: allocating 27385 entries in 107 pages
[ 0.473325] rcu: Hierarchical RCU implementation.
[ 0.473327] rcu: RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=3.
[ 0.473328] Tasks RCU enabled.
[ 0.473329] rcu: RCU calculated value of scheduler-enlistment delay is 10
jiffies.
[ 0.473330] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=3
[ 0.475371] NR_IRQS: 3, nr_irqs: 3, preallocated irqs: 3
[ 0.475402] clocksource: tod: mask: 0xffffffffffffffff max_cycles:
0x3b0a9be803b0a9, max_idle_ns: 1805497147909793 ns
[ 0.475558] printk: console [ttyS1] enabled
[ 0.475623] pid_max: default: 32768 minimum: 301
[ 0.475658] LSM: Security Framework initializing
[ 0.475660] Yama: becoming mindful.
[ 0.475677] AppArmor: AppArmor initialized
[ 0.476134] Dentry cache hash table entries: 262144 (order: 9, 2097152
bytes)
[ 0.476352] Inode-cache hash table entries: 131072 (order: 8, 1048576
bytes)
[ 0.476370] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.476377] Mountpoint-cache hash table entries: 4096 (order: 3, 32768
bytes)
[ 0.476726] rcu: Hierarchical SRCU implementation.
[ 0.476927] smp: Bringing up secondary CPUs ...
[ 0.477181] smp: Brought up 1 node, 2 CPUs
[ 0.477549] devtmpfs: initialized
[ 0.477882] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff,
max_idle_ns: 19112604462750000 ns
[ 0.477902] futex hash table entries: 1024 (order: 6, 262144 bytes)
[ 0.478105] NET: Registered protocol family 16
[ 0.478134] audit: initializing netlink subsys (disabled)
[ 0.478183] audit: type=2000 audit(1547122707.960:1): state=initialized
audit_enabled=0 res=1
[ 0.478222] Spectre V2 mitigation: execute trampolines
[ 0.479205] HugeTLB registered 1.00 MiB page size, pre-allocated 0 pages
[ 0.479623] SCSI subsystem initialized
[ 0.479856] NetLabel: Initializing
[ 0.479858] NetLabel: domain hash size = 128
[ 0.479859] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 0.479871] NetLabel: unlabeled traffic allowed by default
[ 0.507362] VFS: Disk quotas dquot_6.6.0
[ 0.507378] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.507486] AppArmor: AppArmor Filesystem Enabled
[ 0.507847] NET: Registered protocol family 2
[ 0.507976] tcp_listen_portaddr_hash hash table entries: 1024 (order: 2,
16384 bytes)
[ 0.507994] TCP established hash table entries: 16384 (order: 5, 131072
bytes)
[ 0.508126] TCP bind hash table entries: 16384 (order: 6, 262144 bytes)
[ 0.508235] TCP: Hash tables configured (established 16384 bind 16384)
[ 0.508269] UDP hash table entries: 1024 (order: 3, 32768 bytes)
[ 0.508287] UDP-Lite hash table entries: 1024 (order: 3, 32768 bytes)
[ 0.508336] NET: Registered protocol family 1
[ 0.508343] NET: Registered protocol family 44
[ 0.508374] Unpacking initramfs...
[ 0.742412] Freeing initrd memory: 15824K
[ 0.742685] kvm-s390: SIE not available
[ 0.742706] hypfs.7f5705: The hardware system does not support hypfs
[ 0.742714] hypfs.7a79f0: Initialization of hypfs failed with rc=-61
[ 0.743110] Initialise system trusted keyrings
[ 0.743119] Key type blacklist registered
[ 0.743140] workingset: timestamp_bits=42 max_order=19 bucket_order=0
[ 0.744539] zbud: loaded
[ 0.745012] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.745211] fuse init (API version 7.28)
[ 0.771153] Key type asymmetric registered
[ 0.771157] Asymmetric key parser 'x509' registered
[ 0.771171] Block layer SCSI generic (bsg) driver version 0.4 loaded
(major 250)
[ 0.771203] io scheduler noop registered
[ 0.771204] io scheduler deadline registered
[ 0.771242] io scheduler cfq registered (default)
[ 0.771407] random: fast init done
[ 0.771413] hvc_iucv.691dff: The z/VM IUCV HVC device driver cannot be
used without z/VM
[ 0.772923] loop: module loaded
[ 0.772991] tun: Universal TUN/TAP device driver, 1.6
[ 0.773072] device-mapper: uevent: version 1.0.3
[ 0.773140] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03) initialised:
[email protected]
[ 0.773193] cio.b5d5f6: Channel measurement facility initialized using
format extended (mode autodetected)
[ 0.773515] ap.3677f7: The hardware system does not support AP instructions
[ 0.773762] NET: Registered protocol family 10
[ 0.773936] sclp_sd.ef2911: Store Data request failed (eq=2, di=3,
response=0x40f0, flags=0x00, status=0, rc=-5)
[ 0.775411] Unable to handle kernel pointer dereference in virtual kernel
address space
[ 0.775413] Failing address: 0000000000000000 TEID: 0000000000000483
[ 0.775414] Fault in home space mode while using kernel ASCE.
[ 0.775416] AS:0000000000d40007 R3:000000007ffd4007 S:000000007ffdb000
P:000000000000003d
[ 0.775468] Oops: 0004 ilc:3 [#1] SMP
[ 0.775470] Modules linked in:
[ 0.775473] CPU: 0 PID: 7 Comm: kworker/u6:0 Not tainted 4.20.0-2-generic
#3-Ubuntu
[ 0.775474] Hardware name: IBM 2964 N63 400 (KVM/Linux)
[ 0.775479] Workqueue: events_unbound async_run_entry_fn
[ 0.775481] Krnl PSW : 0404c00180000000 00000000008d1a9a
(rb_insert_color_cached+0x1b2/0x258)
[ 0.775487] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0
RI:0 EA:3
[ 0.775489] Krnl GPRS: 0000000000000000 0000000000000000 000000007f841118
000000007ff92630
[ 0.775491] 0000000000000000 0000000000001358 0000000000b5e3b0
0700000000000000
[ 0.775493] 000000002e37cbb5 0000000000000001 000000007f9eb100
000000007f841100
[ 0.775494] 0000000000001358 00000000008f6e70 00000000001aeb7c
000003e00035fb40
[ 0.775501] Krnl Code: 00000000008d1a88: e30040000024 stg
%r0,0(%r4)
[ 0.775501] 00000000008d1a8e: e32050000024 stg
%r2,0(%r5)
[ 0.775501] #00000000008d1a94: e34020080004 lg
%r4,8(%r2)
[ 0.775501] >00000000008d1a9a: e34010100024 stg
%r4,16(%r1)
[ 0.775501] 00000000008d1aa0: b9040052 lgr %r5,%r2
[ 0.775501] 00000000008d1aa4: e31050080024 stg
%r1,8(%r5)
[ 0.775501] 00000000008d1aaa: b90400c2 lgr %r12,%r2
[ 0.775501] 00000000008d1aae: ec46ff56007c cgij
%r4,0,6,8d195a
[ 0.775518] Call Trace:
[ 0.775522] ([<00000000001aecb2>] enqueue_entity+0x552/0xae8)
[ 0.775524] [<00000000001af2ba>] enqueue_task_fair+0x72/0x5a0
[ 0.775527] [<000000000019f878>] ttwu_do_activate+0x58/0xb0
[ 0.775529] [<00000000001a0a68>] try_to_wake_up+0x1f0/0x4e8
[ 0.775532] [<00000000001f9f1c>] call_timer_fn+0x3c/0x180
[ 0.775534] [<00000000001fb104>] expire_timers.part.5+0x134/0x160
[ 0.775536] [<00000000001fb1e6>] run_timer_softirq+0xb6/0x1d8
[ 0.775538] [<00000000008eaa18>] __do_softirq+0xf8/0x368
[ 0.775541] [<0000000000175d70>] irq_exit+0xb8/0xc8
[ 0.775581] [<000000000010c380>] do_IRQ+0x78/0xb0
[ 0.775586] [<00000000008e9f7c>] ext_int_handler+0x128/0x12c
[ 0.775590] [<000000000064b6aa>] __vring_new_virtqueue+0x13a/0x200
[ 0.775592] ([<000000000064b5ba>] __vring_new_virtqueue+0x4a/0x200)
[ 0.775594] [<000000000064b818>] vring_new_virtqueue+0xa8/0xb8
[ 0.775597] [<000000000074283a>] virtio_ccw_find_vqs+0x1e2/0x920
[ 0.775599] [<0000000000651670>] init_vqs+0xf8/0x208
[ 0.775601] [<0000000000651fde>] virtballoon_probe+0x116/0x3f8
[ 0.775603] [<000000000064a8aa>] virtio_dev_probe+0x172/0x2a0
[ 0.775607] [<0000000000688c32>] really_probe+0xf2/0x400
[ 0.775609] [<000000000068926a>] driver_probe_device+0x13a/0x1a0
[ 0.775611] [<0000000000686446>] bus_for_each_drv+0x86/0xc8
[ 0.775612] [<0000000000688a94>] __device_attach+0xec/0x188
[ 0.775614] [<00000000006879a8>] bus_probe_device+0xa8/0xc0
[ 0.775616] [<00000000006832dc>] device_add+0x3ac/0x6a0
[ 0.775618] [<000000000064a4d8>] register_virtio_device+0xe0/0x158
[ 0.775620] [<0000000000741e82>] virtio_ccw_online+0x1b2/0x258
[ 0.775623] [<000000000071eff6>] ccw_device_set_online+0x116/0x530
[ 0.775625] [<000000000074330e>] virtio_ccw_auto_online+0x26/0x58
[ 0.775627] [<0000000000197ca2>] async_run_entry_fn+0x62/0x1d0
[ 0.775629] [<000000000018cd18>] process_one_work+0x278/0x4b8
[ 0.775631] [<000000000018cfa8>] worker_thread+0x50/0x4e0
[ 0.775633] [<0000000000193e5c>] kthread+0x144/0x160
[ 0.775635] [<00000000008e99a2>] kernel_thread_starter+0xa/0x10
[ 0.775637] [<00000000008e9998>] kernel_thread_starter+0x0/0x10
[ 0.775638] Last Breaking-Event-Address:
[ 0.775640] [<00000000008d1a7a>] rb_insert_color_cached+0x192/0x258
[ 0.775641]
[ 0.775644] Kernel panic - not syncing: Fatal exception in interrupt
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