Hi,
I run a PC Engines APU in my basement for local infrastructure with
KVM. Kernels 4.2.4 and 4.2.5 panic on bootup pretty fast after the
usual "x86: Booted up 1 node, 2 CPUs", "smpboot: Total of 2 processors
activated (3999.89 BogoMIPS)" message. The message I would expect
instead of the kernel panic would be "devtmpfs: initialized", as one
can see on a successful 4.2.3 boot with identical kernel configuration.
Loading Linux 4.2.5-zgsrv20080 ...
Loading initial ramdisk ...
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Initializing cgroup subsys cpuacct
Linux version 4.2.5-zgsrv20080 (mh@fan) (gcc version 5.2.1 20151010 (Debian 5.2.1-22) ) #1 SMP PREEMPT Wed Oct 28 18:14:25 UTC 2015
Command line: BOOT_IMAGE=/vmlinuz-4.2.5-zgsrv20080 root=/dev/mapper/aida-aida_root ro console=ttyS0,115200n8 net.ifnames=1
KERNEL supported cpus:
Intel GenuineIntel
AMD AuthenticAMD
Centaur CentaurHauls
x86/fpu: Legacy x87 FPU detected.
x86/fpu: Using 'lazy' FPU context switches.
e820: BIOS-provided physical RAM map:
BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
BIOS-e820: [mem 0x0000000000100000-0x00000000df14dfff] usable
BIOS-e820: [mem 0x00000000df14e000-0x00000000dfffffff] reserved
BIOS-e820: [mem 0x00000000f8000000-0x00000000f8ffffff] reserved
BIOS-e820: [mem 0x0000000100000000-0x000000011effffff] usable
NX (Execute Disable) protection: active
SMBIOS 2.7 present.
e820: last_pfn = 0x11f000 max_arch_pfn = 0x400000000
x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT
e820: last_pfn = 0xdf14e max_arch_pfn = 0x400000000
found SMP MP-table at [mem 0x000f25b0-0x000f25bf] mapped at [ffff8800000f25b0]
Using GB pages for direct mapping
init_memory_mapping: [mem 0x00000000-0x000fffff]
init_memory_mapping: [mem 0x11ee00000-0x11effffff]
init_memory_mapping: [mem 0x100000000-0x11edfffff]
init_memory_mapping: [mem 0xc0000000-0xdf14dfff]
init_memory_mapping: [mem 0x00100000-0xbfffffff]
RAMDISK: [mem 0x371a0000-0x378c7fff]
ACPI: Early table checksum verification disabled
ACPI: RSDP 0x00000000000F2590 000014 (v00 CORE )
ACPI: RSDT 0x00000000DF162424 000044 (v01 CORE COREBOOT 00000000 CORE 00000000)
ACPI: FACP 0x00000000DF164CE8 0000F4 (v04 CORE COREBOOT 00000000 CORE 00000000)
ACPI: DSDT 0x00000000DF1624C8 0027DA (v02 PCENG COREBOOT 00010001 INTL 20121114)
ACPI: FACS 0x00000000DF164CA8 000040
ACPI: SPCR 0x00000000DF164DDC 000050 (v01 CORE COREBOOT 00000000 CORE 00000000)
ACPI: HPET 0x00000000DF164E30 000038 (v01 CORE COREBOOT 00000000 CORE 00000000)
ACPI: APIC 0x00000000DF164E68 00005C (v01 CORE COREBOOT 00000000 CORE 00000000)
ACPI: HEST 0x00000000DF164EC8 000198 (v01 CORE COREBOOT 00000000 CORE 00000000)
ACPI: SSDT 0x00000000DF165060 00168E (v02 AMD ALIB 00000001 MSFT 04000000)
ACPI: SSDT 0x00000000DF1666F0 00030C (v01 AMD POWERNOW 00000001 AMD 00000001)
ACPI: SSDT 0x00000000DF166A00 000045 (v02 CORE COREBOOT 0000002A CORE 0000002A)
No NUMA configuration found
Faking a node at [mem 0x0000000000000000-0x000000011effffff]
NODE_DATA(0) allocated [mem 0x11effc000-0x11effffff]
Zone ranges:
DMA [mem 0x0000000000001000-0x0000000000ffffff]
DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
Normal [mem 0x0000000100000000-0x000000011effffff]
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000000001000-0x000000000009efff]
node 0: [mem 0x0000000000100000-0x00000000df14dfff]
node 0: [mem 0x0000000100000000-0x000000011effffff]
Initmem setup node 0 [mem 0x0000000000001000-0x000000011effffff]
ACPI: PM-Timer IO Port: 0x808
IOAPIC[0]: apic_id 2, version 33, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
Using ACPI (MADT) for SMP configuration information
ACPI: HPET id: 0x43538210 base: 0xfed00000
smpboot: Allowing 2 CPUs, 0 hotplug CPUs
e820: [mem 0xe0000000-0xf7ffffff] available for PCI devices
Booting paravirtualized kernel on bare hardware
clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:2 nr_node_ids:1
PERCPU: Embedded 31 pages/cpu @ffff88011ec00000 s89432 r8192 d29352 u1048576
Built 1 zonelists in Node order, mobility grouping on. Total pages: 1024337
Policy zone: Normal
Kernel command line: BOOT_IMAGE=/vmlinuz-4.2.5-zgsrv20080 root=/dev/mapper/aida-aida_root ro console=ttyS0,115200n8 net.ifnames=1
PID hash table entries: 4096 (order: 3, 32768 bytes)
Memory: 4014848K/4162480K available (4613K kernel code, 600K rwdata, 1656K rodata, 916K init, 452K bss, 147632K reserved, 0K cma-reserved)
Preemptible hierarchical RCU implementation.
Build-time adjustment of leaf fanout to 64.
RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=2
NR_IRQS:4352 nr_irqs:440 16
Console: colour dummy device 80x25
console [ttyS0] enabled
clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133484873504 ns
tsc: Fast TSC calibration using PIT
tsc: Detected 1000.033 MHz processor
Calibrating delay loop (skipped), value calculated using timer frequency.. 2000.06 BogoMIPS (lpj=4000132)
pid_max: default: 32768 minimum: 301
ACPI: Core revision 20150619
ACPI: All ACPI Tables successfully acquired
Security Framework initialized
Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)
Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes)
Initializing cgroup subsys blkio
Initializing cgroup subsys memory
Initializing cgroup subsys devices
Initializing cgroup subsys freezer
Initializing cgroup subsys net_cls
Initializing cgroup subsys net_prio
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
mce: CPU supports 6 MCE banks
Last level iTLB entries: 4KB 512, 2MB 8, 4MB 4
Last level dTLB entries: 4KB 512, 2MB 8, 4MB 4, 1GB 0
Freeing SMP alternatives memory: 20K (ffffffff8179f000 - ffffffff817a4000)
..TIMER: vector=0x30 apic1=0 pin1=2 apic2=0 pin2=0
..MP-BIOS bug: 8254 timer not connected to IO-APIC
...trying to set up timer (IRQ0) through the 8259A ...
..... (found apic 0 pin 0) ...
....... failed.
...trying to set up timer as Virtual Wire IRQ...
..... works.
smpboot: CPU0: AMD G-T40E Processor (fam: 14, model: 02, stepping: 00)
Performance Events: AMD PMU driver.
... version: 0
... bit width: 48
... generic registers: 4
... value mask: 0000ffffffffffff
... max period: 00007fffffffffff
... fixed-purpose events: 0
... event mask: 000000000000000f
NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter.
x86: Booting SMP configuration:
.... node #0, CPUs: #1
x86: Booted up 1 node, 2 CPUs
smpboot: Total of 2 processors activated (4000.13 BogoMIPS)
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [< (null)>] (null)
PGD 0
Oops: 0010 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.5-zgsrv20080 #1
Hardware name: PC Engines APU, BIOS SageBios_PCEngines_APU-45 04/05/2014
task: ffff880119ab0b00 ti: ffff880119ab4000 task.ti: ffff880119ab4000
RIP: 0010:[<0000000000000000>] [< (null)>] (null)
RSP: 0018:ffff880119ab7ed0 EFLAGS: 00010246
RAX: ffff88011a005458 RBX: 0000000000000000 RCX: ffffffff816afce0
RDX: 0000000000000000 RSI: ffff88011a005458 RDI: ffff88011a005408
RBP: 0000000000000002 R08: 0000000000000000 R09: ffff880119c00008
R10: 0000000000000000 R11: 00000000000000b4 R12: ffffffff817d6e20
R13: ffff88011a005408 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88011ec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 000000000162f000 CR4: 00000000000006f0
Stack:
ffffffff816e3d01 0000000000000001 00000000007a1308 000000000000a040
0000000000000001 0000000000000000 ffffffff816e0a16 0000000000000001
0000000000000000 000000000000008b ffffffff816d0fa7 ffffffff81474aa0
Call Trace:
[<ffffffff816e3d01>] ? setup_ioapic_dest+0xcb/0xe5
[<ffffffff816e0a16>] ? native_smp_cpus_done+0xa0/0xa8
[<ffffffff816d0fa7>] ? kernel_init_freeable+0xd7/0x1e3
[<ffffffff81474aa0>] ? rest_init+0x90/0x90
[<ffffffff81474aa9>] ? kernel_init+0x9/0xe0
[<ffffffff8147d6df>] ? ret_from_fork+0x3f/0x70
[<ffffffff81474aa0>] ? rest_init+0x90/0x90
Code: Bad RIP value.
RIP [< (null)>] (null)
RSP <ffff880119ab7ed0>
CR2: 0000000000000000
---[ end trace 613f6ef92efea625 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
I haven't debugged a Linux kernel in years, how do I proceed from
here? Is there a possibility that the "bad" commit can be identified
without a bisect orgy? The APU is rather productive for my LAN and
me rebooting it many times will not please my wife ;-)
Greetings
Marc
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Marc Haber | "I don't trust Computers. They | Mailadresse im Header
Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402
Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421
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