12.0-ALPHA6 dumps with 'Fatal double fault'

[Michael Tuexen]

> On 20. Sep 2018, at 17:12, Michael Schmiedgen <schmiedgen at gmx.net> wrote:
> 
> 
>> Can you elaborate which port was triggering the fault and which platform you are using?
>> I would like to reproduce the issue and fix it.
> 
> Port is devel/apr1 and platform is amd64.
Works fine on my side. It would be helpful if you could build a kernel with
debug symbols, reproduce the problem and provide a stack strace.

Since you said that it crashed multiple times makes me wonder if this problem
is related to SCTP in particular or if there is some other generic issue...

Best regards
Michael
> 
> CPU: Intel(R) Xeon(R) CPU E31245 @ 3.30GHz (3300.10-MHz K8-class CPU)
>  Origin="GenuineIntel"  Id=0x206a7  Family=0x6  Model=0x2a  Stepping=7
>  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
> Features2=0x1fbae3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
>  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
>  AMD Features2=0x1<LAHF>
>  XSAVE Features=0x1<XSAVEOPT>
>  VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
>  TSC: P-state invariant, performance statistics
> 
> It crashed multiple times randomly under heavy load when compiling ports. But I
> observed a crash two times exactly in the same place: configure script SCTP test
> in devel/apr1.
> 
> Thanks,
>  Michael