This bug was fixed in the package qemu - 1:4.2-3ubuntu6.5
---
qemu (1:4.2-3ubuntu6.5) focal; urgency=medium
* further stabilize qemu by importing patches of qemu v4.2.1
Fixes (LP: #1891203) and (LP: #1891877)
- d/p/stable/lp-1891877-*
- as part of the stabilization this
old version
sudo apt install qemu-system-s390x=1:4.2-3ubuntu6.4
...test as listed in the test instructions ...
ubuntu@focal-sqxbr:~$ ./a.out
Segmentation fault
(qemu is dead at this point)
$ sudo apt install qemu-system-s390x=1:4.2-3ubuntu6.5
Reading package lists... Done
Building dependency
Hello Nelson, or anyone else affected,
Accepted qemu into focal-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/qemu/1:4.2-3ubuntu6.5
in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See
** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1883984
Title:
QEMU S/390x sqxbr (128-bit IEEE 754 square root) crashes qemu-system-
** Merge proposal linked:
https://code.launchpad.net/~paelzer/ubuntu/+source/qemu/+git/qemu/+merge/389527
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https://bugs.launchpad.net/bugs/1883984
Title:
QEMU S/390x sqxbr
Note: final upstream commit link
https://git.qemu.org/?p=qemu.git;a=commit;h=9bf728a09bf7509b27543664f9cca6f4f337f608
** Changed in: qemu (Ubuntu)
Assignee: Christian Ehrhardt (paelzer) => (unassigned)
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** Description changed:
+ [Impact]
+
+ * An instruction was described wrong so that on usage the program would
+crash.
+
+ [Test Case]
+
+ * Run s390x in emulation and there use this program:
+For simplicity and speed you can use KVM guest as usual on s390x, that
+after prep of
This bug was fixed in the package qemu - 1:5.0-5ubuntu4
---
qemu (1:5.0-5ubuntu4) groovy; urgency=medium
* xen: provide compat links to what libxen-dev reports where to find
the binaries (LP: #1890005)
* d/p/ubuntu/lp-1883984-target-s390x-Fix-SQXBR.patch: avoid crash on
** Also affects: qemu (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu Focal)
Status: New => Triaged
** Changed in: qemu (Ubuntu Focal)
Importance: Undecided => Medium
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** Merge proposal linked:
https://code.launchpad.net/~paelzer/ubuntu/+source/qemu/+git/qemu/+merge/388545
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https://bugs.launchpad.net/bugs/1883984
Title:
QEMU S/390x sqxbr
** Also affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu)
Status: New => In Progress
** Changed in: qemu (Ubuntu)
Assignee: (unassigned) => Christian Ehrhardt (paelzer)
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** Changed in: qemu
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1883984
Title:
QEMU S/390x sqxbr (128-bit IEEE 754 square root) crashes qemu-system-
I confirm that the patch https://lists.gnu.org/archive/html/qemu-
s390x/2020-06/msg00213.html fixes the issue, both for qemu-s390x and
qemu-system-s390x.
Thanks Richard!
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With --enable-debug,
qemu-s390x: /home/rth/qemu/qemu/include/tcg/tcg.h:687: temp_idx:
Assertion `n >= 0 && n < tcg_ctx->nb_temps' failed.
which turns out to be related to a null-pointer temporary.
** Changed in: qemu
Status: New => Confirmed
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Another way to reproduce this bug is with qemu-s390x and a cross-
compiled binary:
$ s390x-linux-gnu-gcc-5 -static -o bug-sqrtl-one-line.s390x bug-sqrtl-one-line.c
$ qemu-s390x bug-sqrtl-one-line.s390x
Segmentation fault (core dumped)
Find attached the binary.
** Attachment added: "statically
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