On Tue, Sep 29, 2026 at 04:39:05PM +0530, Amit Machhiwal wrote: > On 2026/09/29 01:04 PM, Michal Suchánek wrote: > > On Tue, Sep 29, 2026 at 09:36:05AM +0530, Amit Machhiwal wrote: > > > On 2026/09/28 11:43 AM, Amit Machhiwal wrote: > > > > Hi Michal, > > > > > > > > Thanks for the report. We have been looking at the crash and have some > > > > findings > > > > and follow-up questions. > > > > > > > > On 2026/09/25 10:10 AM, Michal Suchánek wrote: > > > > > Hello, > > > > > > > > > > There appears to be a regression between > > > > > > < snip > > > > > > > > > > > > > > Linux 7.0.12 > > > > > https://github.com/openSUSE/kernel/tree/4c9922875554ec191166ba6c0145f12d8ff9d4fc > > > > > https://github.com/openSUSE/kernel-source/blob/2ebf0bc/config/ppc64le/default > > > > > > I have been trying to recreate the issue with this kernel and config but I > > > haven't been able to. The L2 KVM guest boots fine everytime. > > > > > > In addition to the requested information, could you please also share > > > your qemu > > > cmdline/guest xml you used? > > > > The XML of the VM is below. What other information do you require? > > Thanks for sharing the guest XML. I had requested some more info [1]. Could > you please share that? > > [1] > https://lore.kernel.org/all/[email protected]/
Hello, full log below. host: numactl --hardware available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 node 0 size: 122139 MB node 0 free: 103635 MB node 1 cpus: 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 node 1 size: 139516 MB node 1 free: 128483 MB node distances: node 0 1 0: 10 20 1: 20 10 The patch does indeed make it possible to boot when the buffer allocation fails. Thanks Michal Loading Linux 7.2.8-2.g9b36732-default ... Loading initial ramdisk ... OF stdout device is: /vdevice/vty@30000000 Preparing to boot Linux version 7.2.8-2.g9b36732-default (geeko@buildhost) (gcc (SUSE Linux) 16.2.0, GNU ld (GNU Binutils; openSUSE Tumbleweed) 2.45.0.20251103-4) #1 SMP PREEMPT_DYNAMIC Sat Sep 26 07:00:58 UTC 2026 (9b36732) Detected machine type: 0000000000000101 command line: BOOT_IMAGE=/boot/vmlinux-7.2.8-2.g9b36732-default root=UUID=304c7f07-efbb-1070-2f27-accd935ec088 rw ignore_loglevel systemd.show_status=1 security=selinux selinux=1 Max number of cores passed to firmware: 8192 (NR_CPUS = 8192) Calling ibm,client-architecture-support... done memory layout at init: memory_limit : 0000000000000000 (16 MB aligned) alloc_bottom : 00000000076d0000 alloc_top : 0000000030000000 alloc_top_hi : 0000003e00000000 rmo_top : 0000000030000000 ram_top : 0000003e00000000 instantiating rtas at 0x000000002fff0000... done prom_hold_cpus: skipped copying OF device tree... Building dt strings... Building dt structure... Device tree strings 0x00000000076e0000 -> 0x00000000076e0bec Device tree struct 0x00000000076f0000 -> 0x0000000007710000 Quiescing Open Firmware ... Booting Linux via __start() @ 0x0000000000250000 ... [ 0.000000][ T0] random: crng init done [ 0.000000][ T0] printk: debug: ignoring loglevel setting. [ 0.000000][ T0] radix-mmu: Page sizes from device-tree: [ 0.000000][ T0] radix-mmu: Page size shift = 12 AP=0x0 [ 0.000000][ T0] radix-mmu: Page size shift = 16 AP=0x5 [ 0.000000][ T0] radix-mmu: Page size shift = 21 AP=0x1 [ 0.000000][ T0] radix-mmu: Page size shift = 30 AP=0x2 [ 0.000000][ T0] Activating Kernel Userspace Access Prevention [ 0.000000][ T0] Activating Kernel Userspace Execution Prevention [ 0.000000][ T0] radix-mmu: Mapped 0x0000000000000000-0x0000000003800000 with 2.00 MiB pages (exec) [ 0.000000][ T0] radix-mmu: Mapped 0x0000000003800000-0x0000000040000000 with 2.00 MiB pages [ 0.000000][ T0] radix-mmu: Mapped 0x0000000040000000-0x0000003e00000000 with 1.00 GiB pages [ 0.000000][ T0] lpar: Using radix MMU under hypervisor [ 0.000000][ T0] Linux version 7.2.8-2.g9b36732-default (geeko@buildhost) (gcc (SUSE Linux) 16.2.0, GNU ld (GNU Binutils; openSUSE Tumbleweed) 2.45.0.20251103-4) #1 SMP PREEMPT_DYNAMIC Sat Sep 26 07:00:58 UTC 2026 (9b36732) [ 0.000000][ T0] OF: reserved mem: Reserved memory: No reserved-memory node in the DT [ 0.000000][ T0] Found initrd at 0xc000000006200000:0xc0000000076c986e [ 0.000000][ T0] Hardware name: IBM pSeries (emulated by qemu) Power11 (architected) 0x820200 0xf000007 of:SLOF,HEAD hv:linux,kvm pSeries [ 0.000000][ T0] printk: legacy bootconsole [udbg0] enabled [ 0.000000][ T0] Partition configured for 120 cpus. [ 0.000000][ T0] CPU maps initialized for 1 thread per core [ 0.000000][ T0] (thread shift is 0) [ 0.000000][ T0] Allocated 4288 bytes for 120 pacas [ 0.000000][ T0] numa: Partition configured for 1 NUMA nodes. [ 0.000000][ T0] ----------------------------------------------------- [ 0.000000][ T0] phys_mem_size = 0x3e00000000 [ 0.000000][ T0] dcache_bsize = 0x80 [ 0.000000][ T0] icache_bsize = 0x80 [ 0.000000][ T0] cpu_features = 0x003c00eb8f4f9183 [ 0.000000][ T0] possible = 0x003ffbebcf5fb187 [ 0.000000][ T0] always = 0x0000000380008181 [ 0.000000][ T0] cpu_user_features = 0xdc0065c2 0xaef60000 [ 0.000000][ T0] mmu_features = 0x3c007641 [ 0.000000][ T0] possible = 0x00000000fe00fe41 [ 0.000000][ T0] always = 0x0000000000000000 [ 0.000000][ T0] firmware_features = 0x00000a85455a445f [ 0.000000][ T0] vmalloc start = 0xc008000000000000 [ 0.000000][ T0] IO start = 0xc00a000000000000 [ 0.000000][ T0] vmemmap start = 0xc00c000000000000 [ 0.000000][ T0] ----------------------------------------------------- [ 0.000000][ T0] NODE_DATA(0) allocated [mem 0x3dff6e9b80-0x3dff6f197f] [ 0.000000][ T0] rfi-flush: fallback displacement flush available [ 0.000000][ T0] rfi-flush: ori type flush available [ 0.000000][ T0] rfi-flush: mttrig type flush available [ 0.000000][ T0] rfi-flush: patched 12 locations (ori+mttrig type flush) [ 0.000000][ T0] count-cache-flush: hardware flush enabled. [ 0.000000][ T0] link-stack-flush: software flush enabled. [ 0.000000][ T0] entry-flush: patched 61 locations (ori+mttrig type flush) [ 0.000000][ T0] uaccess-flush: patched 1 locations (ori+mttrig type flush) [ 0.000000][ T0] stf-barrier: eieio barrier available [ 0.000000][ T0] stf-barrier: patched 61 entry locations (eieio barrier) [ 0.000000][ T0] stf-barrier: patched 12 exit locations (eieio barrier) [ 0.000000][ T0] PPC64 nvram contains 65536 bytes [ 0.000000][ T0] barrier-nospec: using ORI speculation barrier [ 0.000000][ T0] barrier-nospec: patched 164 locations [ 0.000000][ T0] Top of RAM: 0x3e00000000, Total RAM: 0x3e00000000 [ 0.000000][ T0] Memory hole size: 0MB [ 0.000000][ T0] Zone ranges: [ 0.000000][ T0] Normal [mem 0x0000000000000000-0x0000003dffffffff] [ 0.000000][ T0] Device empty [ 0.000000][ T0] Movable zone start for each node [ 0.000000][ T0] Early memory node ranges [ 0.000000][ T0] node 0: [mem 0x0000000000000000-0x0000003dffffffff] [ 0.000000][ T0] Initmem setup node 0 [mem 0x0000000000000000-0x0000003dffffffff] [ 0.000000][ T0] percpu: Embedded 4 pages/cpu s127000 r0 d135144 u262144 [ 0.000000][ T0] pcpu-alloc: s127000 r0 d135144 u262144 alloc=4*65536 [ 0.000000][ T0] pcpu-alloc: [0] 000 [0] 001 [0] 002 [0] 003 [ 0.000000][ T0] pcpu-alloc: [0] 004 [0] 005 [0] 006 [0] 007 [ 0.000000][ T0] pcpu-alloc: [0] 008 [0] 009 [0] 010 [0] 011 [ 0.000000][ T0] pcpu-alloc: [0] 012 [0] 013 [0] 014 [0] 015 [ 0.000000][ T0] pcpu-alloc: [0] 016 [0] 017 [0] 018 [0] 019 [ 0.000000][ T0] pcpu-alloc: [0] 020 [0] 021 [0] 022 [0] 023 [ 0.000000][ T0] pcpu-alloc: [0] 024 [0] 025 [0] 026 [0] 027 [ 0.000000][ T0] pcpu-alloc: [0] 028 [0] 029 [0] 030 [0] 031 [ 0.000000][ T0] pcpu-alloc: [0] 032 [0] 033 [0] 034 [0] 035 [ 0.000000][ T0] pcpu-alloc: [0] 036 [0] 037 [0] 038 [0] 039 [ 0.000000][ T0] pcpu-alloc: [0] 040 [0] 041 [0] 042 [0] 043 [ 0.000000][ T0] pcpu-alloc: [0] 044 [0] 045 [0] 046 [0] 047 [ 0.000000][ T0] pcpu-alloc: [0] 048 [0] 049 [0] 050 [0] 051 [ 0.000000][ T0] pcpu-alloc: [0] 052 [0] 053 [0] 054 [0] 055 [ 0.000000][ T0] pcpu-alloc: [0] 056 [0] 057 [0] 058 [0] 059 [ 0.000000][ T0] pcpu-alloc: [0] 060 [0] 061 [0] 062 [0] 063 [ 0.000000][ T0] pcpu-alloc: [0] 064 [0] 065 [0] 066 [0] 067 [ 0.000000][ T0] pcpu-alloc: [0] 068 [0] 069 [0] 070 [0] 071 [ 0.000000][ T0] pcpu-alloc: [0] 072 [0] 073 [0] 074 [0] 075 [ 0.000000][ T0] pcpu-alloc: [0] 076 [0] 077 [0] 078 [0] 079 [ 0.000000][ T0] pcpu-alloc: [0] 080 [0] 081 [0] 082 [0] 083 [ 0.000000][ T0] pcpu-alloc: [0] 084 [0] 085 [0] 086 [0] 087 [ 0.000000][ T0] pcpu-alloc: [0] 088 [0] 089 [0] 090 [0] 091 [ 0.000000][ T0] pcpu-alloc: [0] 092 [0] 093 [0] 094 [0] 095 [ 0.000000][ T0] pcpu-alloc: [0] 096 [0] 097 [0] 098 [0] 099 [ 0.000000][ T0] pcpu-alloc: [0] 100 [0] 101 [0] 102 [0] 103 [ 0.000000][ T0] pcpu-alloc: [0] 104 [0] 105 [0] 106 [0] 107 [ 0.000000][ T0] pcpu-alloc: [0] 108 [0] 109 [0] 110 [0] 111 [ 0.000000][ T0] pcpu-alloc: [0] 112 [0] 113 [0] 114 [0] 115 [ 0.000000][ T0] pcpu-alloc: [0] 116 [0] 117 [0] 118 [0] 119 [ 0.000000][ T0] Kernel command line: BOOT_IMAGE=/boot/vmlinux-7.2.8-2.g9b36732-default root=UUID=304c7f07-efbb-1070-2f27-accd935ec088 rw ignore_loglevel systemd.show_status=1 security=selinux selinux=1 [ 0.000000][ T0] printk: log_buf_len individual max cpu contribution: 32768 bytes [ 0.000000][ T0] printk: log_buf_len total cpu_extra contributions: 3899392 bytes [ 0.000000][ T0] printk: log_buf_len min size: 524288 bytes [ 0.000000][ T0] printk: log buffer data + meta data: 8388608 + 35651584 = 44040192 bytes [ 0.000000][ T0] printk: early log buf free: 518504(98%) [ 0.000000][ T0] Dentry cache hash table entries: 16777216 (order: 11, 134217728 bytes, linear) [ 0.000000][ T0] Inode-cache hash table entries: 8388608 (order: 10, 67108864 bytes, linear) [ 0.000000][ T0] Fallback order for Node 0: 0 [ 0.000000][ T0] Built 1 zonelists, mobility grouping on. Total pages: 4063232 [ 0.000000][ T0] Policy zone: Normal [ 0.000000][ T0] mem auto-init: stack:off, heap alloc:off, heap free:off [ 0.000000][ T0] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=120, Nodes=1 [ 0.000000][ T0] ftrace: allocating 44890 entries in 17 pages [ 0.000000][ T0] ftrace: allocated 17 pages with 2 groups [ 0.000000][ T0] ERROR: Failed to allocate trace buffer [ 0.000000][ T0] ERROR: tracer: failed to allocate ring buffer! [ 0.000000][ T0] Dynamic Preempt: full [ 0.000000][ T0] rcu: Preemptible hierarchical RCU implementation. [ 0.000000][ T0] rcu: RCU event tracing is enabled. [ 0.000000][ T0] rcu: RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=120. [ 0.000000][ T0] Trampoline variant of Tasks RCU enabled. [ 0.000000][ T0] Rude variant of Tasks RCU enabled. [ 0.000000][ T0] Tracing variant of Tasks RCU enabled. [ 0.000000][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. [ 0.000000][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=120 [ 0.000000][ T0] RCU Tasks: Setting shift to 7 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=120. [ 0.000000][ T0] RCU Tasks Rude: Setting shift to 7 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=120. [ 0.000000][ T0] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16 [ 0.000000][ T0] xive: Using IRQ range [0-77] [ 0.000000][ T0] xive: Interrupt handling initialized with spapr backend [ 0.000000][ T0] xive: Using priority 6 for all interrupts [ 0.000000][ T0] xive: Using 64kB queues [ 0.000000][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention. [ 0.000000][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 0.000000][ T0] time_init: decrementer frequency = 512.000000 MHz [ 0.000000][ T0] time_init: processor frequency = 2800.000000 MHz [ 0.000001][ T0] time_init: 56 bit decrementer (max: 7fffffffffffff) [ 0.001053][ T0] clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0x761537d007, max_idle_ns: 440795202126 ns [ 0.002809][ T0] clocksource: timebase mult[1f40000] shift[24] registered [ 0.003930][ T0] clockevent: decrementer mult[83126f] shift[24] cpu[0] [ 0.005371][ T0] Console: colour dummy device 80x25 [ 0.006213][ T0] printk: legacy console [hvc0] enabled [ 0.006213][ T0] printk: legacy console [hvc0] enabled [ 0.007133][ T0] printk: legacy bootconsole [udbg0] disabled [ 0.007133][ T0] printk: legacy bootconsole [udbg0] disabled [ 0.008252][ T0] pid_max: default: 122880 minimum: 960 [ 0.008855][ T0] landlock: Up and running. [ 0.008923][ T0] Yama: becoming mindful. [ 0.008988][ T0] SELinux: Initializing. [ 0.009888][ T0] LSM support for eBPF active [ 0.010417][ T0] Mount-cache hash table entries: 262144 (order: 5, 2097152 bytes, linear) [ 0.010650][ T0] Mountpoint-cache hash table entries: 262144 (order: 5, 2097152 bytes, linear) [ 0.011174][ T0] VFS: Finished mounting rootfs on nullfs [ 0.012508][ T1] Power11 performance monitor hardware support registered [ 0.012658][ T1] rcu: Hierarchical SRCU implementation. [ 0.012718][ T1] rcu: Max phase no-delay instances is 1000. [ 0.012835][ T1] Timer migration: 3 hierarchy levels; 8 children per group; 3 crossnode level [ 0.014144][ T1] smp: Bringing up secondary CPUs ... [ 0.106463][ T1] smp: Brought up 1 node, 120 CPUs [ 0.106558][ T1] numa: Node 0 CPUs: 0-119 [ 0.149312][ T743] node 0 deferred pages initialised in 20ms [ 0.149492][ T1] Memory: 259300352K/260046848K available (20352K kernel code, 4608K rwdata, 28800K rodata, 7872K init, 2163K bss, 639744K reserved, 0K cma-reserved) [ 0.156625][ T1] devtmpfs: initialized [ 0.162536][ T1] PCI host bridge /pci@800000020000000 ranges: [ 0.162635][ T1] IO 0x0000200000000000..0x000020000000ffff -> 0x0000000000000000 [ 0.162725][ T1] MEM 0x0000200080000000..0x00002000ffffffff -> 0x0000000080000000 [ 0.162813][ T1] MEM 0x0000210000000000..0x000021ffffffffff -> 0x0000210000000000 [ 0.163498][ T1] posixtimers hash table entries: 65536 (order: 4, 1048576 bytes, linear) [ 0.163947][ T1] futex hash table entries: 32768 (4194304 bytes on 1 NUMA nodes, total 4096 KiB, linear). [ 0.164925][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family [ 0.165296][ T1] audit: initializing netlink subsys (disabled) [ 0.165763][ T750] audit: type=2000 audit(1790681581.160:1): state=initialized audit_enabled=0 res=1 [ 0.174857][ T1] thermal_sys: Registered thermal governor 'fair_share' [ 0.174860][ T1] thermal_sys: Registered thermal governor 'bang_bang' [ 0.175066][ T1] thermal_sys: Registered thermal governor 'step_wise' [ 0.175159][ T1] thermal_sys: Registered thermal governor 'user_space' [ 0.175781][ T1] cpuidle: using governor ladder [ 0.176356][ T1] cpuidle: using governor menu [ 0.176554][ T1] RTAS daemon started [ 0.176961][ T1] pstore: Using crash dump compression: deflate [ 0.177039][ T1] pstore: Registered nvram as persistent store backend Linux ppc64le #1 SMP PREEMPT_D[ 0.177970][ T1] EEH: pSeries platform initialized [ 0.212558][ T1] kprobes: kprobe jump-optimization is enabled. All kprobes are optimized if possible. [ 0.225791][ T1] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages [ 0.225922][ T1] HugeTLB: 0 KiB vmemmap can be freed for a 2.00 MiB page [ 0.226062][ T1] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages [ 0.226172][ T1] HugeTLB: 0 KiB vmemmap can be freed for a 1.00 GiB page [ 0.229547][ T1] iommu: Default domain type: Translated [ 0.229642][ T1] iommu: DMA domain TLB invalidation policy: strict mode [ 0.247237][ T1] pps_core: LinuxPPS API ver. 1 registered [ 0.247334][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <[email protected]> [ 0.247453][ T1] PTP clock support registered [ 0.247520][ T1] EDAC MC: Ver: 3.0.0 [ 0.248675][ T1] NetLabel: Initializing [ 0.248729][ T1] NetLabel: domain hash size = 128 [ 0.248788][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO [ 0.248901][ T1] NetLabel: unlabeled traffic allowed by default [ 0.248977][ T1] mctp: management component transport protocol core [ 0.249048][ T1] NET: Registered PF_MCTP protocol family [ 0.249146][ T1] PCI: Probing PCI hardware [ 0.250643][ T1] PCI host bridge to bus 0000:00 [ 0.250714][ T1] pci_bus 0000:00: root bus resource [io 0x10000-0x1ffff] (bus address [0x0000-0xffff]) [ 0.250818][ T1] pci_bus 0000:00: root bus resource [mem 0x200080000000-0x2000ffffffff] (bus address [0x80000000-0xffffffff]) [ 0.250945][ T1] pci_bus 0000:00: root bus resource [mem 0x210000000000-0x21ffffffffff 64bit] [ 0.251046][ T1] pci_bus 0000:00: root bus resource [bus 00-ff] [ 0.251348][ T1] pci 0000:00:01.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.252338][ T1] pci 0000:00:02.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.252998][ T1] pci 0000:00:03.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.254045][ T1] pci 0000:00:04.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.255125][ T1] pci 0000:00:05.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.256231][ T1] pci 0000:00:06.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.257309][ T1] pci 0000:00:07.0: No hypervisor support for SR-IOV on this device, IOV BARs disabled. [ 0.262428][ T1] IOMMU table initialized, virtual merging enabled [ 0.262728][ T1] PCI 0000:00 Cannot reserve Legacy IO [io 0x10000-0x10fff] [ 0.262824][ T1] pci_bus 0000:00: resource 4 [io 0x10000-0x1ffff] [ 0.262896][ T1] pci_bus 0000:00: resource 5 [mem 0x200080000000-0x2000ffffffff] [ 0.262982][ T1] pci_bus 0000:00: resource 6 [mem 0x210000000000-0x21ffffffffff 64bit] [ 0.263156][ T1] pci 0000:00:01.0: ibm,query-pe-dma-windows(2026) 800 8000000 20000000 returned 0, lb=2000000000 ps=107 wn=1 [ 0.263297][ T1] pci 0000:00:01.0: Adding to iommu group 0 [ 0.264251][ T1] pci 0000:00:02.0: Adding to iommu group 0 [ 0.265231][ T1] pci 0000:00:03.0: Adding to iommu group 0 [ 0.266076][ T1] pci 0000:00:04.0: Adding to iommu group 0 [ 0.266920][ T1] pci 0000:00:05.0: Adding to iommu group 0 [ 0.267736][ T1] pci 0000:00:06.0: Adding to iommu group 0 [ 0.268556][ T1] pci 0000:00:07.0: Adding to iommu group 0 [ 0.269377][ T1] EEH: No capable adapters found: recovery disabled. [ 0.269458][ T1] PCI: Probing PCI hardware done [ 0.269698][ T1] vgaarb: loaded [ 0.305281][ T1] clocksource: Switched to clocksource timebase [ 0.305844][ T1] VFS: Disk quotas dquot_6.6.0 [ 0.305938][ T1] VFS: Dquot-cache hash table entries: 8192 (65536 bytes) [ 0.306588][ T715] Could not create tracefs directory 'options' [ 0.306689][ T715] BUG: Kernel NULL pointer dereference on read at 0x00000010 [ 0.306845][ T715] Faulting instruction address: 0xc0000000004a0470 [ 0.306936][ T715] Oops: Kernel access of bad area, sig: 7 [#1] [ 0.307158][ T715] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA pSeries [ 0.307306][ T715] Modules linked in: [ 0.307353][ T715] CPU: 92 UID: 0 PID: 715 Comm: kworker/u573:0 Not tainted 7.2.8-2.g9b36732-default #1 PREEMPT(full) openSUSE Tumbleweed (unreleased) 03932d3ccf6ccfe58e0684743c65e360adc8d044 [ 0.307539][ T715] Hardware name: IBM pSeries (emulated by qemu) Power11 (architected) 0x820200 0xf000007 of:SLOF,HEAD hv:linux,kvm pSeries [ 0.307681][ T715] Workqueue: trace_init_wq tracer_init_tracefs_work_func [ 0.307760][ T715] NIP: c0000000004a0470 LR: c000000000460f38 CTR: c0000000005d6b70 [ 0.307846][ T715] REGS: c00000000bacb960 TRAP: 0300 Not tainted (7.2.8-2.g9b36732-default) [ 0.307946][ T715] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 44088204 XER: 0000005b [ 0.308051][ T715] CFAR: c000000000460f34 DAR: 0000000000000010 DSISR: 00080000 IRQMASK: 0 [ 0.308051][ T715] GPR00: c000000000460f38 c00000000bacbc00 c00000000205ad00 c000000003abc210 [ 0.308051][ T715] GPR04: c0000000018da480 c0000000018da478 00000000000000b9 0000000000000064 [ 0.308051][ T715] GPR08: c0000000018da4b8 0000000000000480 0000000000000478 0000000084000204 [ 0.308051][ T715] GPR12: c0000000005d6b70 c000003dffee4300 c00000000145d128 c0000000014603a8 [ 0.308051][ T715] GPR16: c000000001883210 c0000000014604b8 c0000000019e65d8 c0000000018da418 [ 0.308051][ T715] GPR20: c0000000018bc060 c0000000019e5e68 c0000000019e5d58 c0000000018da368 [ 0.308051][ T715] GPR24: c0000000018da358 c0000000018da4b8 c000000003bfd4a0 0000000000000000 [ 0.308051][ T715] GPR28: c0000000018da478 0000000000000000 c0000000018da480 c000000003abe180 [ 0.308882][ T715] NIP [c0000000004a0470] __find_event_file+0x70/0x3f0 [ 0.308957][ T715] LR [c000000000460f38] init_tracer_tracefs+0x7b8/0xc80 [ 0.309031][ T715] Call Trace: [ 0.309075][ T715] [c00000000bacbc00] [c00000000bacbc60] 0xc00000000bacbc60 (unreliable) [ 0.309174][ T715] [c00000000bacbc60] [c000000000460f38] init_tracer_tracefs+0x7b8/0xc80 [ 0.309261][ T715] [c00000000bacbdc0] [c00000000304b7c8] tracer_init_tracefs_work_func+0x60/0x304 [ 0.309362][ T715] [c00000000bacbe50] [c000000000262878] process_one_work+0x1e8/0x560 [ 0.309450][ T715] [c00000000bacbf10] [c0000000002637ec] worker_thread+0x1ec/0x3e0 [ 0.309538][ T715] [c00000000bacbf90] [c00000000027224c] kthread+0x19c/0x1b0 [ 0.309626][ T715] [c00000000bacbfe0] [c00000000000de58] start_kernel_thread+0x14/0x18 [ 0.309713][ T715] Code: fb410030 fb810040 fba10048 7cbc2b78 3ba00000 fbc10050 7d194378 7c9e2378 2e2a0fc0 2da90fc0 f8010070 60420000 <e93b0010> 81490058 e8890018 714a0208 [ 0.309892][ T715] ---[ end trace 0000000000000000 ]--- [ 0.311618][ T715] pstore: backend (nvram) writing error (-1) [ 0.311702][ T715] [ 0.311735][ T715] note: kworker/u573:0[715] exited with irqs disabled [ 0.324507][ T1] NET: Registered PF_INET protocol family [ 0.324815][ T1] IP idents hash table entries: 262144 (order: 5, 2097152 bytes, linear) [ 0.328240][ T1] tcp_listen_portaddr_hash hash table entries: 65536 (order: 4, 1048576 bytes, linear) [ 0.328480][ T1] Table-perturb hash table entries: 65536 (order: 2, 262144 bytes, linear) [ 0.328595][ T1] TCP established hash table entries: 524288 (order: 6, 4194304 bytes, linear) [ 0.329240][ T1] TCP bind hash table entries: 65536 (order: 5, 2097152 bytes, linear) [ 0.329583][ T1] TCP: Hash tables configured (established 524288 bind 65536) [ 0.330131][ T1] MPTCP token hash table entries: 65536 (order: 5, 1572864 bytes, linear) [ 0.330339][ T1] UDP hash table entries: 65536 (order: 6, 4194304 bytes, linear) [ 0.331089][ T1] NET: Registered PF_UNIX/PF_LOCAL protocol family [ 0.331247][ T1] NET: Registered PF_XDP protocol family [ 0.332150][ T1] PCI: CLS 0 bytes, default 128 [ 0.332713][ T741] Trying to unpack rootfs image as initramfs... [ 0.336221][ T1] rtas_flash: no firmware flash support [ 0.339614][ T1] Initialise system trusted keyrings [ 0.339753][ T1] Key type blacklist registered [ 0.346290][ T1] workingset: timestamp_bits=38 (anon: 33) max_order=22 bucket_order=0 (anon: 0) [ 0.348685][ T1] integrity: Platform Keyring initialized [ 0.348792][ T1] integrity: Machine keyring initialized [ 0.348855][ T1] Allocating IMA blacklist keyring. [ 0.356845][ T1] Key type asymmetric registered [ 0.356916][ T1] Asymmetric key parser 'x509' registered [ 0.358009][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246) [ 0.358510][ T1] io scheduler mq-deadline registered [ 0.358577][ T1] io scheduler kyber registered [ 0.358684][ T1] io scheduler bfq registered [ 0.404683][ T1] ledtrig-cpu: registered to indicate activity on CPUs [ 0.404950][ T1] virtio-pci 0000:00:01.0: enabling device (0100 -> 0103) [ 0.406751][ T1] virtio-pci 0000:00:01.0: ibm,query-pe-dma-windows(2026) 800 8000000 20000000 returned 0, lb=2000000000 ps=107 wn=1 [ 0.407544][ T1] virtio-pci 0000:00:01.0: ibm,create-pe-dma-window(2027) 800 8000000 20000000 18 26 returned 0 (liobn = 0x80000001 starting addr = 8000000 0) [ 0.410779][ T1] virtio-pci 0000:00:01.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.410894][ T1] virtio-pci 0000:00:01.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.411006][ T1] virtio-pci 0000:00:01.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.411110][ T1] virtio-pci 0000:00:01.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.412473][ T1] virtio-pci 0000:00:03.0: enabling device (0100 -> 0103) [ 0.413988][ T1] virtio-pci 0000:00:03.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.414090][ T1] virtio-pci 0000:00:03.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.414198][ T1] virtio-pci 0000:00:03.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.414295][ T1] virtio-pci 0000:00:03.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.416317][ T1] virtio-pci 0000:00:04.0: enabling device (0100 -> 0103) [ 0.418273][ T1] virtio-pci 0000:00:04.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.418380][ T1] virtio-pci 0000:00:04.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.418485][ T1] virtio-pci 0000:00:04.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.418583][ T1] virtio-pci 0000:00:04.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.419921][ T1] virtio-pci 0000:00:05.0: enabling device (0100 -> 0103) [ 0.421893][ T1] virtio-pci 0000:00:05.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.422001][ T1] virtio-pci 0000:00:05.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.422109][ T1] virtio-pci 0000:00:05.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.422211][ T1] virtio-pci 0000:00:05.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.423534][ T1] virtio-pci 0000:00:06.0: enabling device (0100 -> 0103) [ 0.425294][ T1] virtio-pci 0000:00:06.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.425410][ T1] virtio-pci 0000:00:06.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.425515][ T1] virtio-pci 0000:00:06.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.425614][ T1] virtio-pci 0000:00:06.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.427555][ T1] virtio-pci 0000:00:07.0: enabling device (0100 -> 0103) [ 0.429660][ T1] virtio-pci 0000:00:07.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.429765][ T1] virtio-pci 0000:00:07.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.429870][ T1] virtio-pci 0000:00:07.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [ 0.429968][ T1] virtio-pci 0000:00:07.0: iommu: 64-bit OK but direct DMA is limited by 800004000000000 [ 0.433452][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.435876][ T741] Freeing initrd memory: 21248K [ 0.456548][ T1] Non-volatile memory driver v1.3 [ 0.456628][ T1] pseries_rng: Registering IBM pSeries RNG driver [ 0.458556][ T1] mousedev: PS/2 mouse device common for all mice [ 0.460262][ T1] pseries_idle_driver registered [ 0.460402][ T1] hid: raw HID events driver (C) Jiri Kosina [ 0.460557][ T1] drop_monitor: Initializing network drop monitor service [ 0.460894][ T1] NET: Registered PF_INET6 protocol family [ 0.462331][ T1] Segment Routing with IPv6 [ 0.462427][ T1] RPL Segment Routing with IPv6 [ 0.462514][ T1] In-situ OAM (IOAM) with IPv6 [ 0.462617][ T1] PFKEY is deprecated and scheduled to be removed in 2027, please contact the netdev mailing list [ 0.462736][ T1] NET: Registered PF_KEY protocol family [ 0.463182][ T1] secvar-sysfs: Failed to retrieve secvar operations [ 0.465966][ T1] registered taskstats version 1 [ 0.488370][ T1] Loading compiled-in X.509 certificates [ 0.504872][ T1] Loaded X.509 cert 'Kernel OBS Project: 1fb41512acbc8eebdf828d877e4367bf6c719af3' [ 0.511066][ T1] Demotion targets for Node 0: null [ 0.511165][ T1] page_owner is disabled [ 0.542843][ T1] Key type .fscrypt registered [ 0.542917][ T1] Key type fscrypt-provisioning registered [ 0.543156][ T1] Key type big_key registered [ 0.557927][ T1] Key type encrypted registered [ 0.558126][ T1] Secure boot mode disabled [ 0.558201][ T1] ima: No TPM chip found, activating TPM-bypass! [ 0.558277][ T1] Loading compiled-in module X.509 certificates [ 0.558540][ T1] Loaded X.509 cert 'Kernel OBS Project: 1fb41512acbc8eebdf828d877e4367bf6c719af3' [ 0.558643][ T1] ima: Allocated hash algorithm: sha256 [ 0.559731][ T1] Secure boot mode disabled [ 0.559834][ T1] Trusted boot mode disabled [ 0.559900][ T1] ima: No architecture policies found [ 0.559996][ T1] evm: Initialising EVM extended attributes: [ 0.560069][ T1] evm: security.selinux [ 0.560119][ T1] evm: security.SMACK64 (disabled) [ 0.560178][ T1] evm: security.SMACK64EXEC (disabled) [ 0.560236][ T1] evm: security.SMACK64TRANSMUTE (disabled) [ 0.560309][ T1] evm: security.SMACK64MMAP (disabled) [ 0.560368][ T1] evm: security.apparmor [ 0.560412][ T1] evm: security.ima [ 0.560457][ T1] evm: security.capability [ 0.560515][ T1] evm: HMAC attrs: 0x1 [ 0.569151][ T1] SED: plpks not available
