Core dump on qemu

[paulsonmathew21]

Instead of crashing the VM, I am getting a core dump from the qemu.

ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ qemu-system-x86_64: hw/usb/redirect.c:1306: usbredir_chardev_read: Assertion `dev->read_buf == ((void *)0)' failed.
Aborted (core dumped)

This is the error that I am getting.

[schumilo]

According to the crash report, it looks like that you are using a pre-built QEMU binary or you might have forgotten to apply the associated patch (qemu-2.1.1.patch). Since this patch is for a very old and dated version, I have attached a simple script to build and patch various QEMU versions. If you build QEMU for the first time, you also need to compile and install usbredir by yourself. I have attached a script for this purpose as well. Please be aware that you probably have to install certain build tools such as automake and libtool.

qemu.sh

#!/bin/bash

patch=true
version='2.4.0'

wget http://wiki.qemu-project.org/download/qemu-$version.tar.bz2
tar xf qemu-$version.tar.bz2

if $patch ; then
    sed -i '/    usbredirparser_caps_set_cap(caps, usb_redir_cap_64bits_ids);/c\    //usbredirparser_caps_set_cap(caps, usb_redir_cap_64bits_ids);' qemu-$version/hw/usb/redirect.c
    sed -i '/    dev->next_attach_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 200;/c\    dev->next_attach_time = 0;' qemu-$version/hw/usb/redirect.c
fi

cd qemu-$version
./configure --target-list=x86_64-softmmu --enable-usb-redir
make -j 4 

usbredir.sh

#!/bin/bash

git clone https://github.com/SPICE/usbredir.git
cd usbredir/
aclocal
autoconf
autoheader
./autogen.sh
automake --add-missing
make
sudo make install