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+permissions: 0.919
+KVM: 0.911
+register: 0.904
+semantic: 0.904
+performance: 0.899
+graphic: 0.891
+peripherals: 0.876
+assembly: 0.872
+architecture: 0.852
+kernel: 0.845
+hypervisor: 0.839
+ppc: 0.834
+arm: 0.831
+virtual: 0.831
+risc-v: 0.830
+PID: 0.820
+TCG: 0.819
+debug: 0.798
+boot: 0.796
+vnc: 0.794
+VMM: 0.785
+device: 0.780
+x86: 0.770
+user-level: 0.743
+files: 0.735
+socket: 0.708
+mistranslation: 0.683
+network: 0.636
+i386: 0.554
+
+Unpredictable behaviour resulting in User process faults
+
+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
+
+Recreate with 20.04 LTS (GNU/Linux 5.4.0-26-generic s390x)
+
+
+May  6 16:14:47 qemu2004 kernel: [86269.521861] User process fault: interruption code 0038 ilc:1 
+May  6 16:14:47 qemu2004 kernel: [86269.521943] Failing address: 6563746de40b6000 TEID: 6563746de40b6800
+May  6 16:14:47 qemu2004 kernel: [86269.521961] Fault in primary space mode while using user ASCE.
+May  6 16:14:47 qemu2004 kernel: [86269.521994] AS:00000001cc8581c7 R3:0000000000000024 
+May  6 16:14:47 qemu2004 kernel: [86269.522113] CPU: 2 PID: 19249 Comm: npm Not tainted 5.4.0-26-generic #30-Ubuntu
+May  6 16:14:47 qemu2004 kernel: [86269.522127] Hardware name: QEMU 2964 QEMU (KVM/Linux)
+May  6 16:14:47 qemu2004 kernel: [86269.522145] User PSW : 0705200180000000 6563746de40b6167
+May  6 16:14:47 qemu2004 kernel: [86269.522173]            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
+May  6 16:14:47 qemu2004 kernel: [86269.522198] User GPRS: 0000000000000000 000000edc8ef86a1 6563746de40b6167 0000000000000000
+May  6 16:14:47 qemu2004 kernel: [86269.522214]            0000000001cfb968 00000004e40b6164 0000000001cfedec 00000004e40b6100
+May  6 16:14:47 qemu2004 kernel: [86269.522230]            0000000001cf60b0 000003fff32fbfb0 00000004e40b60e9 000003fff32fbee0
+May  6 16:14:47 qemu2004 kernel: [86269.522246]            0000000000000004 00000004e40b616c 000003ffaeb7c5a4 000003fff32fbe70
+May  6 16:14:47 qemu2004 kernel: [86269.522335] User Code: Bad PSW.
+May  6 16:14:47 qemu2004 kernel: [86269.522350] Last Breaking-Event-Address:
+May  6 16:14:47 qemu2004 kernel: [86269.522380]  [<000000edc8ef8a28>] 0xedc8ef8a28
+
+
+Segmentation fault.] - rollbackFailedOptional: verb npm-session 6b1c07499474304d
+
+
+
+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
+
+