Re: [Xen-devel] Linux 4.15-rc6 + xen-unstable: BUG: unable to handle kernel NULL pointer dereference at (null), [ 0.000000] IP: zero_resv_unavail+0x8e/0xe1

[Juergen Gross <jgross@xxxxxxxx>]

On 04/01/18 11:17, Sander Eikelenboom wrote:
> Hi Boris / Juergen,
> 
> First of all best wishes for a quite turbulent starting new year.
> 
> Now the holidays are over I finally gotten to test a linux 4.15-rc6 kernel
> and experienced a crash in early dom0 boot on my system (AMD phenom x6).
> 
> I tested some earlier linux 4.15 rc's but experienced crashes then as well, 
> but didn't have time to setup serial console to send them in 
> (and waited to see if the issue Boris fixed with AMD PCI 64bit bar's could be 
> it). 
> 
> But since that patch went in before 4.15 rc6, that doesn't seem to be the 
> issue. 
> So it could be that the culprit went in pretty earlier in the 4.15 cycle.
> 
> The 4.15-rc6 kernel boots fine on bare metal, as does a 4.14.6 kernel on 
> xen-unstable.
> 
> Hopefully you have a pointer to what is wrong, if not i can try to do a 
> bisect.

A bisect would be very welcome.


Juergen

> 
> --
> Sander
> 
> Attached: .config and full serial log
> 
>  0.000000] ACPI: Early table checksum verification disabled
> [    0.000000] ACPI: RSDP 0x00000000000FB100 000014 (v00 ACPIAM)
> [    0.000000] ACPI: RSDT 0x00000000C7F90000 000048 (v01 MSI    OEMSLIC  
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: FACP 0x00000000C7F90200 000084 (v01 7640MS A7640100 
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: DSDT 0x00000000C7F905E0 009427 (v01 A7640  A7640100 
> 00000100 INTL 20051117)
> [    0.000000] ACPI: FACS 0x00000000C7F9E000 000040
> [    0.000000] ACPI: APIC 0x00000000C7F90390 000088 (v01 7640MS A7640100 
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: MCFG 0x00000000C7F90420 00003C (v01 7640MS OEMMCFG  
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: SLIC 0x00000000C7F90460 000176 (v01 MSI    OEMSLIC  
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: OEMB 0x00000000C7F9E040 000072 (v01 7640MS A7640100 
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: SRAT 0x00000000C7F9A5E0 000108 (v03 AMD    FAM_F_10 
> 00000002 AMD  00000001)
> [    0.000000] ACPI: HPET 0x00000000C7F9A6F0 000038 (v01 7640MS OEMHPET  
> 20100913 MSFT 00000097)
> [    0.000000] ACPI: IVRS 0x00000000C7F9A730 000110 (v01 AMD    RD890S   
> 00202031 AMD  00000000)
> [    0.000000] ACPI: SSDT 0x00000000C7F9A840 000DA4 (v01 A M I  POWERNOW 
> 00000001 AMD  00000001)
> [    0.000000] ACPI: Local APIC address 0xfee00000
> [    0.000000] Setting APIC routing to Xen PV.
> [    0.000000] NUMA turned off
> [    0.000000] Faking a node at [mem 0x0000000000000000-0x000000007fffffff]
> [    0.000000] NODE_DATA(0) allocated [mem 0x7fc15000-0x7fc1efff]
> [    0.000000] tsc: Fast TSC calibration using PIT
> [    0.000000] Zone ranges:
> [    0.000000]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
> [    0.000000]   DMA32    [mem 0x0000000001000000-0x000000007fffffff]
> [    0.000000]   Normal   empty
> [    0.000000] Movable zone start for each node
> [    0.000000] Early memory node ranges
> [    0.000000]   node   0: [mem 0x0000000000001000-0x0000000000095fff]
> [    0.000000]   node   0: [mem 0x0000000000100000-0x000000007fffffff]
> [    0.000000] Initmem setup node 0 [mem 
> 0x0000000000001000-0x000000007fffffff]
> [    0.000000] On node 0 totalpages: 524181
> [    0.000000]   DMA zone: 64 pages used for memmap
> [    0.000000]   DMA zone: 21 pages reserved
> [    0.000000]   DMA zone: 3989 pages, LIFO batch:0
> [    0.000000]   DMA32 zone: 8128 pages used for memmap
> [    0.000000]   DMA32 zone: 520192 pages, LIFO batch:31
> [    0.000000] BUG: unable to handle kernel NULL pointer dereference at       
>     (null)
> [    0.000000] IP: zero_resv_unavail+0x8e/0xe1
> [    0.000000] PGD 0 P4D 0 
> [    0.000000] Oops: 0002 [#1] SMP
> [    0.000000] Modules linked in:
> [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 
> 4.15.0-rc6-20180104-linus-doflr+ #1
> [    0.000000] Hardware name: MSI MS-7640/890FXA-GD70 (MS-7640)  , BIOS 
> V1.8B1 09/13/2010
> [    0.000000] RIP: e030:zero_resv_unavail+0x8e/0xe1
> [    0.000000] RSP: e02b:ffffffff82803d68 EFLAGS: 00010006
> [    0.000000] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 
> 0000000000000010
> [    0.000000] RDX: 000000000007ffff RSI: 0000000000000100 RDI: 
> ffffea0002000000
> [    0.000000] RBP: ffffffff82803d70 R08: ffffea0002000000 R09: 
> 0000000000000002
> [    0.000000] R10: 0000000000000002 R11: 0000000000000003 R12: 
> ffffea0000000000
> [    0.000000] R13: 0000000000000000 R14: ffffffff82803f20 R15: 
> 0000000000000000
> [    0.000000] FS:  0000000000000000(0000) GS:ffffffff82e16000(0000) 
> knlGS:0000000000000000
> [    0.000000] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    0.000000] CR2: 0000000000000000 CR3: 0000000002823000 CR4: 
> 0000000000000660
> [    0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
> 0000000000000000
> [    0.000000] DR3: 0000000000000000 DR6: 0000000000000000 DR7: 
> 0000000000000000
> [    0.000000] Call Trace:
> [    0.000000]  ? free_area_init_nodes+0x690/0x69f
> [    0.000000]  ? zone_sizes_init+0x4b/0x50
> [    0.000000]  ? xen_pagetable_init+0x13/0x43f
> [    0.000000]  ? memblock_find_dma_reserve+0x141/0x15b
> [    0.000000]  ? memblock_find_dma_reserve+0x150/0x15b
> [    0.000000]  ? numa_init+0x43c/0x453
> [    0.000000]  ? setup_arch+0x7a0/0x87f
> [    0.000000]  ? start_kernel+0x58/0x3a8
> [    0.000000]  ? iommu_shutdown_noop+0x10/0x10
> [    0.000000]  ? xen_start_kernel+0x528/0x534
> [    0.000000] Code: da 49 c1 e0 06 4d 01 e0 48 8b 44 24 08 48 8d 0c 1a 48 05 
> ff 0f 00 00 48 c1 e8 0c 48 39 c8 76 16 4c 89 c7 b9 10 00 00 00 44 89 e8 <f3> 
> ab 48 ff c3 49 83 c0 40 eb d2 6a 00 55 31 d2 49 c7 c0 90 78 
> [    0.000000] RIP: zero_resv_unavail+0x8e/0xe1 RSP: ffffffff82803d68
> [    0.000000] CR2: 0000000000000000
> [    0.000000] ---[ end trace b788f32e38f6de39 ]---
> [    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
> (XEN) [2018-01-04 09:52:49.218] Hardware Dom0 crashed: rebooting machine in 5 
> seconds.
> 


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