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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 12 Mar 2020 08:23:27 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02C8NQhp47185990 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 12 Mar 2020 08:23:26 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F3AF3A4053; Thu, 12 Mar 2020 08:23:25 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D340AA4040; Thu, 12 Mar 2020 08:23:23 +0000 (GMT) Received: from [9.199.197.43] (unknown [9.199.197.43]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 12 Mar 2020 08:23:23 +0000 (GMT) From: Sachin Sant Content-Type: multipart/mixed; boundary="Apple-Mail=_84315D49-E70C-46FA-A7DE-364B0CA38ACB" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Re: [PATCH 1/3] powerpc/numa: Set numa_node for all possible cpus Date: Thu, 12 Mar 2020 13:53:22 +0530 In-Reply-To: <20200312052707.GA3277@linux.vnet.ibm.com> To: Srikar Dronamraju References: <20200311110237.5731-1-srikar@linux.vnet.ibm.com> <20200311110237.5731-2-srikar@linux.vnet.ibm.com> <20200311115735.GM23944@dhcp22.suse.cz> <20200312052707.GA3277@linux.vnet.ibm.com> X-Mailer: Apple Mail (2.3445.104.11) X-TM-AS-GCONF: 00 x-cbid: 20031208-0020-0000-0000-000003B3213C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031208-0021-0000-0000-0000220B7453 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-12_01:2020-03-11, 2020-03-12 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 adultscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 suspectscore=0 impostorscore=0 clxscore=1015 malwarescore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003120044 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, LKML , Michal Hocko , linux-mm@kvack.org, Mel Gorman , "Kirill A. Shutemov" , Andrew Morton , Linus Torvalds , Christopher Lameter , Vlastimil Babka Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" --Apple-Mail=_84315D49-E70C-46FA-A7DE-364B0CA38ACB Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On 12-Mar-2020, at 10:57 AM, Srikar Dronamraju = wrote: >=20 > * Michal Hocko [2020-03-11 12:57:35]: >=20 >> On Wed 11-03-20 16:32:35, Srikar Dronamraju wrote: >>> A Powerpc system with multiple possible nodes and with CONFIG_NUMA >>> enabled always used to have a node 0, even if node 0 does not any = cpus >>> or memory attached to it. As per PAPR, node affinity of a cpu is = only >>> available once its present / online. For all cpus that are possible = but >>> not present, cpu_to_node() would point to node 0. >>>=20 >>> To ensure a cpuless, memoryless dummy node is not online, powerpc = need >>> to make sure all possible but not present cpu_to_node are set to a >>> proper node. >>=20 >> Just curious, is this somehow related to >> http://lkml.kernel.org/r/20200227182650.GG3771@dhcp22.suse.cz? >>=20 >=20 > The issue I am trying to fix is a known issue in Powerpc since many = years. > So this surely not a problem after a75056fc1e7c (mm/memcontrol.c: = allocate > shrinker_map on appropriate NUMA node").=20 >=20 > I tried v5.6-rc4 + a75056fc1e7c but didnt face any issues booting the > kernel. Will work with Sachin/Abdul (reporters of the issue). >=20 I applied this 3 patch series on top of March 11 next tree (commit = d44a64766795 ) The kernel still fails to boot with same call trace. [ 6.159357] BUG: Kernel NULL pointer dereference on read at = 0x000073b0 [ 6.159363] Faulting instruction address: 0xc0000000003d7174 [ 6.159368] Oops: Kernel access of bad area, sig: 11 [#1] [ 6.159372] LE PAGE_SIZE=3D64K MMU=3DHash SMP NR_CPUS=3D2048 NUMA = pSeries [ 6.159378] Modules linked in: [ 6.159382] CPU: 17 PID: 1 Comm: systemd Not tainted = 5.6.0-rc5-next-20200311-autotest+ #1 [ 6.159388] NIP: c0000000003d7174 LR: c0000000003d7714 CTR: = c000000000400e70 [ 6.159393] REGS: c0000008b36836d0 TRAP: 0300 Not tainted = (5.6.0-rc5-next-20200311-autotest+) [ 6.159398] MSR: 8000000000009033 CR: = 24004848 XER: 00000000 [ 6.159406] CFAR: c00000000000dec4 DAR: 00000000000073b0 DSISR: = 40000000 IRQMASK: 1 [ 6.159406] GPR00: c0000000003d7714 c0000008b3683960 c00000000155e300 = c0000008b301f500 [ 6.159406] GPR04: 0000000000000dc0 0000000000000000 c0000000003456f8 = c0000008bb198620 [ 6.159406] GPR08: 00000008ba0f0000 0000000000000001 0000000000000000 = 0000000000000000 [ 6.159406] GPR12: 0000000024004848 c00000001ec55e00 0000000000000000 = 0000000000000000 [ 6.159406] GPR16: c0000008b0a82048 c000000001595898 c000000001750ca8 = 0000000000000002 [ 6.159406] GPR20: c000000001750cb8 c000000001624478 0000000fffffffe0 = 5deadbeef0000122 [ 6.159406] GPR24: 0000000000000001 0000000000000dc0 0000000000000000 = c0000000003456f8 [ 6.159406] GPR28: c0000008b301f500 c0000008bb198620 0000000000000000 = c00c000002285a40 [ 6.159453] NIP [c0000000003d7174] ___slab_alloc+0x1f4/0x760 [ 6.159458] LR [c0000000003d7714] __slab_alloc+0x34/0x60 [ 6.159462] Call Trace: [ 6.159465] [c0000008b3683a40] [c0000008b3683a70] 0xc0000008b3683a70 [ 6.159471] [c0000008b3683a70] [c0000000003d8b20] = __kmalloc_node+0x110/0x490 [ 6.159477] [c0000008b3683af0] [c0000000003456f8] = kvmalloc_node+0x58/0x110 [ 6.159483] [c0000008b3683b30] [c000000000400f78] = mem_cgroup_css_online+0x108/0x270 [ 6.159489] [c0000008b3683b90] [c000000000236ed8] = online_css+0x48/0xd0 [ 6.159494] [c0000008b3683bc0] [c00000000023ffac] = cgroup_apply_control_enable+0x2ec/0x4d0 [ 6.159501] [c0000008b3683ca0] [c0000000002437c8] = cgroup_mkdir+0x228/0x5f0 [ 6.159506] [c0000008b3683d10] [c000000000521780] = kernfs_iop_mkdir+0x90/0xf0 [ 6.159512] [c0000008b3683d50] [c00000000043f670] = vfs_mkdir+0x110/0x230 [ 6.159517] [c0000008b3683da0] [c000000000443150] = do_mkdirat+0xb0/0x1a0 [ 6.159523] [c0000008b3683e20] [c00000000000b278] = system_call+0x5c/0x68 [ 6.159527] Instruction dump: [ 6.159531] 7c421378 e95f0000 714a0001 4082fff0 4bffff64 60000000 = 60000000 faa10088 [ 6.159538] 3ea2000c 3ab56178 7b4a1f24 7d55502a 2faa0000 = 409e0394 3d02002a [ 6.159545] ---[ end trace 36d65cb66091a5b6 ]=E2=80=94 Boot log attached. Thanks -Sachin= --Apple-Mail=_84315D49-E70C-46FA-A7DE-364B0CA38ACB Content-Disposition: attachment; filename=memory-less-node-boot.log Content-Type: application/octet-stream; x-unix-mode=0644; name="memory-less-node-boot.log" Content-Transfer-Encoding: 7bit # kexec -e [ 4149.149473] kexec_core: Starting new kernel [ 4149.169501] kexec: waiting for cpu 2 (physical 2) to enter 1 state [ 4149.169512] kexec: waiting for cpu 23 (physical 23) to enter 1 state [ 4149.169521] kexec: waiting for cpu 1 (physical 1) to enter 2 state [ 4149.169596] kexec: waiting for cpu 2 (physical 2) to enter 2 state [ 4149.169610] kexec: waiting for cpu 3 (physical 3) to enter 2 state [ 4149.169620] kexec: waiting for cpu 8 (physical 8) to enter 2 state [ 4149.333175] kexec: Starting switchover sequence. I'm in purgatory [ 0.000000] hash-mmu: Page sizes from device-tree: [ 0.000000] hash-mmu: base_shift=12: shift=12, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=0 [ 0.000000] hash-mmu: base_shift=12: shift=16, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=7 [ 0.000000] hash-mmu: base_shift=12: shift=24, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=56 [ 0.000000] hash-mmu: base_shift=16: shift=16, sllp=0x0110, avpnm=0x00000000, tlbiel=1, penc=1 [ 0.000000] hash-mmu: base_shift=16: shift=24, sllp=0x0110, avpnm=0x00000000, tlbiel=1, penc=8 [ 0.000000] hash-mmu: base_shift=24: shift=24, sllp=0x0100, avpnm=0x00000001, tlbiel=0, penc=0 [ 0.000000] hash-mmu: base_shift=34: shift=34, sllp=0x0120, avpnm=0x000007ff, tlbiel=0, penc=3 [ 0.000000] Using 1TB segments [ 0.000000] hash-mmu: Initializing hash mmu with SLB [ 0.000000] Linux version 5.6.0-rc5-next-20200311-autotest+ (root@ltc-zzci-2.aus.stglabs.ibm.com) (gcc version 8.3.1 20190507 (Red Hat 8.3.1-4) (GCC)) #1 SMP Thu Mar 12 03:03:59 CDT 2020 [ 0.000000] Found initrd at 0xc000000003350000:0xc000000004d9808f [ 0.000000] Using pSeries machine description [ 0.000000] printk: bootconsole [udbg0] enabled [ 0.000000] Partition configured for 32 cpus. [ 0.000000] CPU maps initialized for 8 threads per core [ 0.000000] ----------------------------------------------------- [ 0.000000] phys_mem_size = 0x8c0000000 [ 0.000000] dcache_bsize = 0x80 [ 0.000000] icache_bsize = 0x80 [ 0.000000] cpu_features = 0x0001c07f8f5f91a7 [ 0.000000] possible = 0x0003fbffcf5fb1a7 [ 0.000000] always = 0x00000003800081a1 [ 0.000000] cpu_user_features = 0xdc0065c2 0xefe00000 [ 0.000000] mmu_features = 0x7c006001 [ 0.000000] firmware_features = 0x00000097c45bfc57 [ 0.000000] vmalloc start = 0xc008000000000000 [ 0.000000] IO start = 0xc00a000000000000 [ 0.000000] vmemmap start = 0xc00c000000000000 [ 0.000000] hash-mmu: ppc64_pft_size = 0x1c [ 0.000000] hash-mmu: htab_hash_mask = 0x1fffff [ 0.000000] ----------------------------------------------------- [ 0.000000] numa: NODE_DATA [mem 0x8bfedc900-0x8bfee3fff] [ 0.000000] rfi-flush: fallback displacement flush available [ 0.000000] rfi-flush: mttrig type flush available [ 0.000000] link-stack-flush: software flush enabled. [ 0.000000] count-cache-flush: software flush disabled. [ 0.000000] stf-barrier: eieio barrier available [ 0.000000] lpar: H_BLOCK_REMOVE supports base psize:0 psize:0 block size:8 [ 0.000000] lpar: H_BLOCK_REMOVE supports base psize:0 psize:2 block size:8 [ 0.000000] lpar: H_BLOCK_REMOVE supports base psize:0 psize:10 block size:8 [ 0.000000] lpar: H_BLOCK_REMOVE supports base psize:2 psize:2 block size:8 [ 0.000000] lpar: H_BLOCK_REMOVE supports base psize:2 psize:10 block size:8 [ 0.000000] PPC64 nvram contains 15360 bytes [ 0.000000] barrier-nospec: using ORI speculation barrier [ 0.000000] Zone ranges: [ 0.000000] Normal [mem 0x0000000000000000-0x00000008bfffffff] [ 0.000000] Device empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 1: [mem 0x0000000000000000-0x00000008bfffffff] [ 0.000000] Initmem setup node 1 [mem 0x0000000000000000-0x00000008bfffffff] [ 0.000000] percpu: Embedded 11 pages/cpu s624024 r0 d96872 u1048576 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 572880 [ 0.000000] Policy zone: Normal [ 0.000000] Kernel command line: root=UUID=681ebf25-b7c8-49b9-b247-35a96bc8183f [ 0.000000] Dentry cache hash table entries: 8388608 (order: 10, 67108864 bytes, linear) [ 0.000000] Inode-cache hash table entries: 4194304 (order: 9, 33554432 bytes, linear) [ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off [ 0.000000] Memory: 36388480K/36700160K available (11840K kernel code, 1728K rwdata, 3712K rodata, 4992K init, 2845K bss, 311680K reserved, 0K cma-reserved) [ 0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=32, Nodes=32 [ 0.000000] ftrace: allocating 29890 entries in 11 pages [ 0.000000] ftrace: allocated 11 pages with 3 groups [ 0.000000] rcu: Hierarchical RCU implementation. [ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=2048 to nr_cpu_ids=32. [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. [ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=32 [ 0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16 [ 0.000000] xive: Using IRQ range [94000-9401f] [ 0.000000] xive: Interrupt handling initialized with spapr backend [ 0.000000] xive: Using priority 7 for all interrupts [ 0.000000] xive: Using 64kB queues [ 0.000000] rcu: Offload RCU callbacks from CPUs: (none). [ 0.000000] random: get_random_u64 called from start_kernel+0x748/0x9a4 with crng_init=0 [ 0.000001] time_init: 56 bit decrementer (max: 7fffffffffffff) [ 0.000065] clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0x761537d007, max_idle_ns: 440795202126 ns [ 0.000173] clocksource: timebase mult[1f40000] shift[24] registered [ 0.000299] Console: colour dummy device 80x25 [ 0.000350] printk: console [hvc0] enabled [ 0.000350] printk: console [hvc0] enabled [ 0.000397] printk: bootconsole [udbg0] disabled [ 0.000397] printk: bootconsole [udbg0] disabled [ 0.000472] pid_max: default: 32768 minimum: 301 [ 0.000621] Mount-cache hash table entries: 131072 (order: 4, 1048576 bytes, linear) [ 0.000690] Mountpoint-cache hash table entries: 131072 (order: 4, 1048576 bytes, linear) [ 0.001491] EEH: pSeries platform initialized [ 0.001499] POWER9 performance monitor hardware support registered [ 0.001531] rcu: Hierarchical SRCU implementation. [ 0.002227] smp: Bringing up secondary CPUs ... [ 0.011406] smp: Brought up 1 node, 32 CPUs [ 0.011413] numa: Node 1 CPUs: 0-31 [ 0.011417] Using small cores at SMT level [ 0.011420] Using shared cache scheduler topology [ 0.012363] devtmpfs: initialized [ 0.015539] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 0.015550] futex hash table entries: 8192 (order: 4, 1048576 bytes, linear) [ 0.015773] thermal_sys: Registered thermal governor 'fair_share' [ 0.015774] thermal_sys: Registered thermal governor 'step_wise' [ 0.015880] NET: Registered protocol family 16 [ 0.016023] audit: initializing netlink subsys (disabled) [ 0.016073] audit: type=2000 audit(1584000985.010:1): state=initialized audit_enabled=0 res=1 [ 0.016180] cpuidle: using governor menu [ 0.016353] pstore: Registered nvram as persistent store backend [ 0.020998] PCI: Probing PCI hardware [ 0.021005] EEH: No capable adapters found: recovery disabled. [ 0.021071] pseries-rng: Registering arch random hook. [ 0.022801] HugeTLB registered 16.0 MiB page size, pre-allocated 0 pages [ 0.022808] HugeTLB registered 16.0 GiB page size, pre-allocated 0 pages [ 0.263342] random: fast init done [ 0.264479] iommu: Default domain type: Translated [ 0.264517] vgaarb: loaded [ 0.264595] SCSI subsystem initialized [ 0.264626] usbcore: registered new interface driver usbfs [ 0.264635] usbcore: registered new interface driver hub [ 0.264714] usbcore: registered new device driver usb [ 0.264835] EDAC MC: Ver: 3.0.0 [ 0.265112] clocksource: Switched to clocksource timebase [ 0.276114] VFS: Disk quotas dquot_6.6.0 [ 0.276139] VFS: Dquot-cache hash table entries: 8192 (order 0, 65536 bytes) [ 0.277659] NET: Registered protocol family 2 [ 0.277834] tcp_listen_portaddr_hash hash table entries: 32768 (order: 3, 524288 bytes, linear) [ 0.277888] TCP established hash table entries: 524288 (order: 6, 4194304 bytes, linear) [ 0.278586] TCP bind hash table entries: 65536 (order: 4, 1048576 bytes, linear) [ 0.278680] TCP: Hash tables configured (established 524288 bind 65536) [ 0.278718] UDP hash table entries: 32768 (order: 4, 1048576 bytes, linear) [ 0.278817] UDP-Lite hash table entries: 32768 (order: 4, 1048576 bytes, linear) [ 0.279011] NET: Registered protocol family 1 [ 0.279020] PCI: CLS 0 bytes, default 128 [ 0.279056] Trying to unpack rootfs image as initramfs... [ 0.690890] Freeing initrd memory: 26880K [ 0.693555] IOMMU table initialized, virtual merging enabled [ 0.713723] hv-24x7: read 1530 catalog entries, created 537 event attrs (0 failures), 275 descs [ 0.714748] workingset: timestamp_bits=38 max_order=20 bucket_order=0 [ 0.715826] zbud: loaded [ 0.725026] NET: Registered protocol family 38 [ 0.725033] Key type asymmetric registered [ 0.725037] Asymmetric key parser 'x509' registered [ 0.725046] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249) [ 0.725138] io scheduler mq-deadline registered [ 0.725143] io scheduler kyber registered [ 0.725573] atomic64_test: passed [ 0.725607] PowerPC PowerNV PCI Hotplug Driver version: 0.1 [ 0.725872] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.726066] Non-volatile memory driver v1.3 [ 0.726089] Linux agpgart interface v0.103 [ 6.005301] tpm_ibmvtpm 30000003: CRQ initialization completed [ 6.005309] tpm_ibmvtpm 30000003: ibmvtpm device is not ready [ 6.005310] tpm_ibmvtpm 30000003: ibmvtpm device is not ready [ 6.005540] rdac: device handler registered [ 6.005579] hp_sw: device handler registered [ 6.005583] emc: device handler registered [ 6.005651] alua: device handler registered [ 6.005730] libphy: Fixed MDIO Bus: probed [ 6.005763] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 6.005773] ehci-pci: EHCI PCI platform driver [ 6.005781] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 6.005790] ohci-pci: OHCI PCI platform driver [ 6.005797] uhci_hcd: USB Universal Host Controller Interface driver [ 6.005828] usbcore: registered new interface driver usbserial_generic [ 6.005835] usbserial: USB Serial support registered for generic [ 6.005882] mousedev: PS/2 mouse device common for all mice [ 6.005988] rtc-generic rtc-generic: registered as rtc0 [ 6.006323] nx_compress_pseries ibm,compression-v1: nx842_OF_upd: max_sync_size new:65536 old:0 [ 6.006332] nx_compress_pseries ibm,compression-v1: nx842_OF_upd: max_sync_sg new:510 old:0 [ 6.006339] nx_compress_pseries ibm,compression-v1: nx842_OF_upd: max_sg_len new:4080 old:0 [ 6.006396] alg: No test for 842 (842-nx) [ 6.007511] hid: raw HID events driver (C) Jiri Kosina [ 6.007602] usbcore: registered new interface driver usbhid [ 6.007605] usbhid: USB HID core driver [ 6.007657] drop_monitor: Initializing network drop monitor service [ 6.007735] Initializing XFRM netlink socket [ 6.007866] NET: Registered protocol family 10 [ 6.008125] Segment Routing with IPv6 [ 6.008141] NET: Registered protocol family 17 [ 6.008645] registered taskstats version 1 [ 6.008677] zswap: loaded using pool lzo/zbud [ 6.008809] pstore: Using crash dump compression: deflate [ 6.012620] Key type big_key registered [ 6.012774] rtc-generic rtc-generic: setting system clock to 2020-03-12T08:16:31 UTC (1584000991) [ 6.014119] Freeing unused kernel memory: 4992K [ 6.014124] Kernel memory protection not selected by kernel config. [ 6.014128] Run /init as init process [ 6.023254] systemd[1]: systemd 239 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=legacy) [ 6.023441] systemd[1]: Detected architecture ppc64-le. [ 6.023447] systemd[1]: Running in initial RAM disk. Welcome to Red Hat Enterprise Linux 8.1 Beta (Ootpa) dracut-049-26.git20190806.el8 (Initramfs)! [ 6.105290] systemd[1]: Set hostname to . [ 6.157928] random: systemd: uninitialized urandom read (16 bytes read) [ 6.157996] systemd[1]: Listening on udev Kernel Socket. [ OK ] Listening on udev Kernel Socket. [ 6.158142] random: systemd: uninitialized urandom read (16 bytes read) [ 6.158225] systemd[1]: Listening on Journal Socket. [ OK ] Listening on Journal Socket. [ 6.158356] random: systemd: uninitialized urandom read (16 bytes read) [ 6.158368] systemd[1]: Reached target Timers. [ OK ] Reached target Timers. [ 6.159357] BUG: Kernel NULL pointer dereference on read at 0x000073b0 [ 6.159363] Faulting instruction address: 0xc0000000003d7174 [ 6.159368] Oops: Kernel access of bad area, sig: 11 [#1] [ 6.159372] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries [ 6.159378] Modules linked in: [ 6.159382] CPU: 17 PID: 1 Comm: systemd Not tainted 5.6.0-rc5-next-20200311-autotest+ #1 [ 6.159388] NIP: c0000000003d7174 LR: c0000000003d7714 CTR: c000000000400e70 [ 6.159393] REGS: c0000008b36836d0 TRAP: 0300 Not tainted (5.6.0-rc5-next-20200311-autotest+) [ 6.159398] MSR: 8000000000009033 CR: 24004848 XER: 00000000 [ 6.159406] CFAR: c00000000000dec4 DAR: 00000000000073b0 DSISR: 40000000 IRQMASK: 1 [ 6.159406] GPR00: c0000000003d7714 c0000008b3683960 c00000000155e300 c0000008b301f500 [ 6.159406] GPR04: 0000000000000dc0 0000000000000000 c0000000003456f8 c0000008bb198620 [ 6.159406] GPR08: 00000008ba0f0000 0000000000000001 0000000000000000 0000000000000000 [ 6.159406] GPR12: 0000000024004848 c00000001ec55e00 0000000000000000 0000000000000000 [ 6.159406] GPR16: c0000008b0a82048 c000000001595898 c000000001750ca8 0000000000000002 [ 6.159406] GPR20: c000000001750cb8 c000000001624478 0000000fffffffe0 5deadbeef0000122 [ 6.159406] GPR24: 0000000000000001 0000000000000dc0 0000000000000000 c0000000003456f8 [ 6.159406] GPR28: c0000008b301f500 c0000008bb198620 0000000000000000 c00c000002285a40 [ 6.159453] NIP [c0000000003d7174] ___slab_alloc+0x1f4/0x760 [ 6.159458] LR [c0000000003d7714] __slab_alloc+0x34/0x60 [ 6.159462] Call Trace: [ 6.159465] [c0000008b3683a40] [c0000008b3683a70] 0xc0000008b3683a70 [ 6.159471] [c0000008b3683a70] [c0000000003d8b20] __kmalloc_node+0x110/0x490 [ 6.159477] [c0000008b3683af0] [c0000000003456f8] kvmalloc_node+0x58/0x110 [ 6.159483] [c0000008b3683b30] [c000000000400f78] mem_cgroup_css_online+0x108/0x270 [ 6.159489] [c0000008b3683b90] [c000000000236ed8] online_css+0x48/0xd0 [ 6.159494] [c0000008b3683bc0] [c00000000023ffac] cgroup_apply_control_enable+0x2ec/0x4d0 [ 6.159501] [c0000008b3683ca0] [c0000000002437c8] cgroup_mkdir+0x228/0x5f0 [ 6.159506] [c0000008b3683d10] [c000000000521780] kernfs_iop_mkdir+0x90/0xf0 [ 6.159512] [c0000008b3683d50] [c00000000043f670] vfs_mkdir+0x110/0x230 [ 6.159517] [c0000008b3683da0] [c000000000443150] do_mkdirat+0xb0/0x1a0 [ 6.159523] [c0000008b3683e20] [c00000000000b278] system_call+0x5c/0x68 [ 6.159527] Instruction dump: [ 6.159531] 7c421378 e95f0000 714a0001 4082fff0 4bffff64 60000000 60000000 faa10088 [ 6.159538] 3ea2000c 3ab56178 7b4a1f24 7d55502a 2faa0000 409e0394 3d02002a [ 6.159545] ---[ end trace 36d65cb66091a5b6 ]--- [ 6.161610] [ 7.161622] Kernel panic - not syncing: Fatal exception [ 7.169280] ------------[ cut here ]------------ [ 7.169289] WARNING: CPU: 17 PID: 1 at drivers/tty/vt/vt.c:4266 do_unblank_screen+0x190/0x250 [ 7.169297] Modules linked in: [ 7.169303] CPU: 17 PID: 1 Comm: systemd Tainted: G D 5.6.0-rc5-next-20200311-autotest+ #1 [ 7.169312] NIP: c0000000006ed370 LR: c0000000006ed35c CTR: c000000000b7b960 [ 7.169320] REGS: c0000008b36831b0 TRAP: 0700 Tainted: G D (5.6.0-rc5-next-20200311-autotest+) [ 7.169330] MSR: 8000000000021033 CR: 28002242 XER: 2004000c [ 7.169341] CFAR: c0000000001c8948 IRQMASK: 3 [ 7.169341] GPR00: c0000000006ed35c c0000008b3683440 c00000000155e300 0000000000000000 [ 7.169341] GPR04: 0000000000000003 c0000008b06c200e 0000000000001dd7 c0000008b3683380 [ 7.169341] GPR08: c000000001423760 0000000000000000 0000000000000000 c0000008b36831ff [ 7.169341] GPR12: 0000000028002448 c00000001ec55e00 0000000000000000 0000000000000000 [ 7.169341] GPR16: c0000008b0a82048 c000000001595898 c000000001750ca8 0000000000000002 [ 7.169341] GPR20: c000000001750cb8 c000000001624478 0000000fffffffe0 5deadbeef0000122 [ 7.169341] GPR24: 0000000000000001 0000000000000dc0 c00000000142c830 c0000000003456f8 [ 7.169341] GPR28: c000000001636f58 c000000001636f80 0000000000000000 c000000001745a88 [ 7.169409] NIP [c0000000006ed370] do_unblank_screen+0x190/0x250 [ 7.169417] LR [c0000000006ed35c] do_unblank_screen+0x17c/0x250 [ 7.169423] Call Trace: [ 7.169428] [c0000008b3683440] [c0000000006ed38c] do_unblank_screen+0x1ac/0x250 (unreliable) [ 7.169439] [c0000008b36834c0] [c00000000013eb24] panic+0x1e8/0x414 [ 7.169447] [c0000008b3683560] [c00000000002c71c] oops_end+0x1ac/0x1b0 [ 7.169455] [c0000008b36835e0] [c0000000000868e0] bad_page_fault+0x190/0x1e0 [ 7.169464] [c0000008b3683660] [c00000000000a8a4] handle_page_fault+0x2c/0x30 [ 7.169475] --- interrupt: 300 at ___slab_alloc+0x1f4/0x760 [ 7.169475] LR = __slab_alloc+0x34/0x60 [ 7.169484] [c0000008b3683960] [0000000000000000] 0x0 (unreliable) [ 7.169491] [c0000008b3683a40] [c0000008b3683a70] 0xc0000008b3683a70 [ 7.169500] [c0000008b3683a70] [c0000000003d8b20] __kmalloc_node+0x110/0x490 [ 7.169509] [c0000008b3683af0] [c0000000003456f8] kvmalloc_node+0x58/0x110 [ 7.169516] [c0000008b3683b30] [c000000000400f78] mem_cgroup_css_online+0x108/0x270 [ 7.169525] [c0000008b3683b90] [c000000000236ed8] online_css+0x48/0xd0 [ 7.169533] [c0000008b3683bc0] [c00000000023ffac] cgroup_apply_control_enable+0x2ec/0x4d0 [ 7.169542] [c0000008b3683ca0] [c0000000002437c8] cgroup_mkdir+0x228/0x5f0 [ 7.169550] [c0000008b3683d10] [c000000000521780] kernfs_iop_mkdir+0x90/0xf0 [ 7.169559] [c0000008b3683d50] [c00000000043f670] vfs_mkdir+0x110/0x230 [ 7.169567] [c0000008b3683da0] [c000000000443150] do_mkdirat+0xb0/0x1a0 [ 7.169575] [c0000008b3683e20] [c00000000000b278] system_call+0x5c/0x68 [ 7.169581] Instruction dump: [ 7.169586] 4e800020 60000000 60000000 60000000 7c0802a6 f8010090 4badb5e1 60000000 [ 7.169597] 813f0000 7d231b78 2f830000 409e0034 <0fe00000> e8010090 7c0803a6 4bfffeac [ 7.169608] ---[ end trace 36d65cb66091a5b7 ]--- [ 7.169615] Rebooting in 10 seconds.. --Apple-Mail=_84315D49-E70C-46FA-A7DE-364B0CA38ACB--