[Bug 1865160] Re: Unpredictable behaviour resulting in User process faults

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/197


** Changed in: qemu
       Status: New => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #197
   https://gitlab.com/qemu-project/qemu/-/issues/197

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https://bugs.launchpad.net/bugs/1865160

Title:
  Unpredictable behaviour resulting in User process faults

Status in QEMU:
  Expired

Bug description:
  An example of the behaviour can be reproduced when using NPM, whereby
  running the command multiple times will result in a variety of error
  conditions causing the command to fail:

  Example of failure:

  Segmentation fault.] / rollbackFailedOptional: verb npm-session
  1a805a5e0ff7b8f5

  [ 3144.216869] User process fault: interruption code 0038 ilc:3 
  [ 3144.216981] Failing address: 66616c7365000000 TEID: 66616c7365000800
  [ 3144.217009] Fault in primary space mode while using user ASCE.
  [ 3144.217055] AS:00000000ed28c1c7 R3:0000000000000024 

  Feb 28 14:32:08 qemus390x kernel: [ 3144.216869] User process fault: 
interruption code 0038 ilc:3 
  Feb 28 14:32:08 qemus390x kernel: [ 3144.216981] Failing address: 
66616c7365000000 TEID: 66616c7365000800
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217009] Fault in primary space mode 
while using user ASCE.
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217055] AS:00000000ed28c1c7 
R3:0000000000000024 
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217217] CPU: 2 PID: 1018 Comm: npm 
Not tainted 4.15.0-88-generic #88-Ubuntu
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217234] Hardware name: QEMU 2964 
QEMU (KVM/Linux)
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217257] User PSW : 00000000185db982 
00000000c1d5a1a1
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217290]            R:0 T:1 IO:1 EX:1 
Key:0 M:1 W:0 P:1 AS:0 CC:2 PM:0 RI:0 EA:3
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217322] User GPRS: 000002aa03705200 
0000006a16d73ac1 0000003da4b829f1 0000000000000000
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217343]            0000003da4b82a08 
0000003da4b82a08 000002aa036a92ec 0000000000000000
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217364]            0000003da4b829f1 
000003ffdb8f7e50 0000003da4b82a08 000003ffdb8f7d88
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217385]            66616c7365000000 
000002aa036a05b0 000002aa015bcfb2 000003ffdb8f7d88
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512] User Code:#0000006a16d73b00: 
c0f4000000df    brcl    15,0000006a16d73cbe
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512]           >0000006a16d73b06: 
a7290000                lghi    %r2,0
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512]            0000006a16d73b0a: 
07fe            bcr     15,%r14
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512]            0000006a16d73b0c: 
c02f000001f3    llilf   %r2,499
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512]            0000006a16d73b12: 
e3d0dff8ff71    lay     %r13,-8(%r13)
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512]            0000006a16d73b18: 
e320d0000024    stg     %r2,0(%r13)
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217512]            0000006a16d73b1e: 
c028000002aa    iihf    %r2,682
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217724] Last Breaking-Event-Address:
  Feb 28 14:32:08 qemus390x kernel: [ 3144.217759]  [<000002aa015bcfae>] 
0x2aa015bcfae


  
  QEMU emulator version 4.2.0
  Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers

  QEMU Command:

  sudo qemu-system-s390x -smp cpus=5 -machine s390-ccw-virtio -cpu
  max,zpci=on -serial telnet::4441,server -display none -m 4096 -net nic
  -net tap  -drive file=ubuntu.root,if=none,id=drive-virtio-
  disk0,format=raw,cache=none -device virtio-blk-
  ccw,devno=fe.0.0003,drive=drive-virtio-disk0,id=virtio-
  disk0,bootindex=100,scsi=off -drive file=ubuntu.home,if=none,id=drive-
  virtio-disk1,format=raw,cache=none -device virtio-blk-
  ccw,devno=fe.0.0002,drive=drive-virtio-disk1,id=virtio-
  disk1,bootindex=1,scsi=off -drive file=ubuntu.swap,if=none,id=drive-
  virtio-disk4,format=raw,cache=none -device virtio-blk-
  ccw,devno=fe.0.0005,drive=drive-virtio-disk4,id=virtio-
  disk4,bootindex=101,scsi=off

  
  Ubuntu 18.04.4 LTS qemus390x ttysclp0

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