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id = 685
title = "QEMU Segmentation fault - Xen / Ubuntu 18.04"
state = "closed"
created_at = "2021-10-22T09:03:56.138Z"
closed_at = "2023-06-06T06:16:06.526Z"
labels = ["Storage", "accel: Xen"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/685"
host-os = "Ubuntu 18.04.1"
host-arch = "x86_64"
qemu-version = "QEMU emulator version 5.2.0 (Debian 1:5.2+dfsg-9ubuntu3.1)"
guest-os = "Windows 7 SP1"
guest-arch = "x86_64"
description = """See notes below."""
reproduce = """See notes below."""
additional = """* The error is very rare.
* The VMs have been created with `xl create` (Xen utility).
* The error has been found with _coredump_ ([core.qemu-system-i38.0.abb1047980ee4143937dcce7b8da9e60.16892.1634806267000000.lz4](/uploads/a90e21a2e14c9ebba07585034de25b1a/core.qemu-system-i38.0.abb1047980ee4143937dcce7b8da9e60.16892.1634806267000000.lz4)):
```bash
$ sudo coredumpctl info 16892
PID: 16892 (qemu-system-i38)
UID: 0 (root)
GID: 0 (root)
Signal: 11 (SEGV)
Timestamp: Thu 2021-10-21 11:51:07 MSK (17min ago)
Command Line: /usr/bin/qemu-system-i386 -xen-domid 2679 -no-shutdown -chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-2679,server,nowait -mon chardev=libxl-cmd,mode=control -chardev socket,id=libxenstat-cmd,path=/var/run/xen/qmp
Executable: /usr/bin/qemu-system-i386
Control Group: /system.slice/ptms.sandbox.sandbox-creator.service
Unit: ptms.sandbox.sandbox-creator.service
Slice: system.slice
Boot ID: abb1047980ee4143937dcce7b8da9e60
Machine ID: bdce82649a9d4d9db192a692b330943f
Hostname: ptms-7
Storage: /var/lib/systemd/coredump/core.qemu-system-i38.0.abb1047980ee4143937dcce7b8da9e60.16892.1634806267000000.lz4
Message: Process 16892 (qemu-system-i38) of user 0 dumped core.
Stack trace of thread 16892:
#0 0x00007f1c6d33ca5f __memmove_avx_unaligned_erms (libc.so.6)
#1 0x00005586abeae8bf iov_from_buf_full (qemu-system-i386)
#2 0x00005586abe03d46 n/a (qemu-system-i386)
#3 0x00005586abdd17ad n/a (qemu-system-i386)
#4 0x00005586abeac93c n/a (qemu-system-i386)
#5 0x00007f1c6d2067b0 n/a (libc.so.6)
#6 0x00005586abeb89bd n/a (qemu-system-i386)
#7 0x00005586abeaaf87 aio_bh_poll (qemu-system-i386)
#8 0x00005586abe9a45e aio_dispatch (qemu-system-i386)
#9 0x00005586abeaad9e n/a (qemu-system-i386)
#10 0x00007f1c6fd7f537 g_main_context_dispatch (libglib-2.0.so.0)
#11 0x00005586abeb5caa main_loop_wait (qemu-system-i386)
#12 0x00005586abca092d qemu_main_loop (qemu-system-i386)
#13 0x00005586ab9f508e main (qemu-system-i386)
#14 0x00007f1c6d1cfbf7 __libc_start_main (libc.so.6)
#15 0x00005586ab9f97fa _start (qemu-system-i386)
Stack trace of thread 16932:
#0 0x00007f1c6d2c9639 syscall (libc.so.6)
#1 0x00005586abe9de1b qemu_event_wait (qemu-system-i386)
#2 0x00005586abea5e28 n/a (qemu-system-i386)
#3 0x00005586abe9d0b6 n/a (qemu-system-i386)
#4 0x00007f1c6d5a66db start_thread (libpthread.so.0)
#5 0x00007f1c6d2cf71f __clone (libc.so.6)
Stack trace of thread 16957:
#0 0x00007f1c6d5b0474 __libc_read (libpthread.so.0)
#1 0x00007f1c71f67777 n/a (libxenstore.so.3.0)
#2 0x00007f1c71f6784d n/a (libxenstore.so.3.0)
#3 0x00007f1c71f67b61 n/a (libxenstore.so.3.0)
#4 0x00007f1c6d5a66db start_thread (libpthread.so.0)
#5 0x00007f1c6d2cf71f __clone (libc.so.6)
Stack trace of thread 16958:
#0 0x00007f1c6d5b0474 __libc_read (libpthread.so.0)
#1 0x00007f1c71f67777 n/a (libxenstore.so.3.0)
#2 0x00007f1c71f6784d n/a (libxenstore.so.3.0)
#3 0x00007f1c71f67b61 n/a (libxenstore.so.3.0)
#4 0x00007f1c6d5a66db start_thread (libpthread.so.0)
#5 0x00007f1c6d2cf71f __clone (libc.so.6)
```"""
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