On Thu, Jul 18, 2019 at 10:25:57AM +0200, Peter Krempa wrote: > On Wed, Jul 17, 2019 at 13:33:08 -0500, Probir Roy wrote: > > Hi, > > > > I am trying to preload two shared libraries while running Qemu using > > libvirt. To preload the shared libraries I have added an environment > > variable in the $domain.xml file with the following command: > > > > ``` > > virt-xml generic --edit --confirm --qemu-commandline > > 'env=LD_PRELOAD=/home/probir/Downloads/kpv_temp/temp/kvmTest/build_kvm/libperform.so:/home/probir/Downloads/kpv_temp/temp/kvmTest/dependencies/libmonitor/installDir/lib/libmonitor.so' > > > > ``` > > However, while running the domain, I get the following message of failure > > to preload the shared files in the log. > > > > ``` > > 2019-07-17 17:35:22.939+0000: starting up libvirt version: 1.3.1, package: > > 1ubuntu10.27 (Marc Deslauriers <marc.deslauriers@xxxxxxxxxx> Tue, 02 Jul > > 2019 09:22:37 -0400), qemu version: 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.39), > > hostname: probir-XPS-13-9343 > > LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin > > QEMU_AUDIO_DRV=spice > > LD_PRELOAD=/home/probir/Downloads/kpv_temp/temp/kvmTest/build_kvm/libperform.so:/home/probir/Downloads/kpv_temp/temp/kvmTest/dependencies/libmonitor/installDir/lib/libmonitor.so > > /usr/bin/kvm-spice -name generic -S -machine > > [...] > > > ERROR: ld.so: object > > '/home/probir/Downloads/kpv_temp/temp/kvmTest/build_kvm/libperform.so' from > > LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored. > > ERROR: ld.so: object > > '/home/probir/Downloads/kpv_temp/temp/kvmTest/dependencies/libmonitor/installDir/lib/libmonitor.so' > > from LD_PRELOAD cannot be preloaded (cannot open shared object file): > > ignored. > > My rough guess would be that the process we forked off for qemu has > security confinment applied (apparmor and unix permissions changed in > case of ubuntu) and ld.so is thus unable to open the libraries you want > it to preload. Yep, $HOME permissions would be the most likely explanation as $HOME is usually locked down by default which would prevent the qemu user from loading anything from under it. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
