Public bug reported:
Following minimal test case crashes qemu-system-i386 on amd64 host:
qemu-system-i386 -name test -nodefconfig -no-user-config -nodefaults
-sandbox off -machine none -m 256 -balloon none -no-acpi -parallel none
-vga virtio -display "vnc=unix:vnc.socket" -boot menu=on
and open the connection (not even real VNC client needed):
socat - UNIX:vnc.socket
Result:
*** Error in `qemu-system-i386': free(): invalid pointer: 0x00007fbad024eb78 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7fbacff017e5]
/lib/x86_64-linux-gnu/libc.so.6(+0x8037a)[0x7fbacff0a37a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fbacff0e53c]
qemu-system-i386(+0x4a630d)[0x56145bd6930d]
qemu-system-i386(visit_type_VncServerInfo+0xa2)[0x56145bd7b342]
qemu-system-i386(qapi_free_VncServerInfo+0x30)[0x56145bd68910]
qemu-system-i386(+0x4358fa)[0x56145bcf88fa]
qemu-system-i386(+0x43aa03)[0x56145bcfda03]
qemu-system-i386(+0x43abe5)[0x56145bcfdbe5]
qemu-system-i386(aio_dispatch+0x68)[0x56145bd1f9e8]
qemu-system-i386(+0x44fcce)[0x56145bd12cce]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_dispatch+0x2a7)[0x7fbad0be2197]
...
$ lsb_release -rd
Description: Ubuntu 16.04.2 LTS
Release: 16.04
$ apt-cache policy qemu-system-x86
qemu-system-x86:
Installed: 1:2.5+dfsg-5ubuntu10.14
Candidate: 1:2.5+dfsg-5ubuntu10.14
Version table:
*** 1:2.5+dfsg-5ubuntu10.14 500
500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
100 /var/lib/dpkg/status
1:2.5+dfsg-5ubuntu10 500
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Package changed: qemu-kvm (Ubuntu) => qemu (Ubuntu)
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https://bugs.launchpad.net/bugs/1705743
Title:
qemu-system-x86 crashes when VNC connection is established
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