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Allow VM to read sysfs PCI config, revision files

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This fixes a blank screen when viewing a VM with virtio graphics and
gl-accelerated Spice display on Ubuntu 22.04 / libvirt 8.0.0 / qemu 6.2.

Without these AppArmor permissions, the libvirt error log contains
repetitions of:

qemu_spice_gl_scanout_texture: failed to get fd for texture

This appears to be similar to this GNOME Boxes issue:
https://gitlab.gnome.org/GNOME/gnome-boxes/-/issues/586

Fixes: https://launchpad.net/bugs/1972075

Signed-off-by: Max Goodhart <c@chromakode.com>
Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Max Goodhart 2022-05-11 15:08:39 -07:00 committed by Christian Ehrhardt
parent 1bd24e79be
commit 42cb548045
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GPG Key ID: BA3E29338280B242
1 changed files with 1 additions and 1 deletions
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2
src/security/virt-aa-helper.c
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@ -1316,7 +1316,7 @@ get_files(vahControl * ctl)
virBufferAddLit(&buf, " \"/dev/nvidiactl\" rw,\n");
virBufferAddLit(&buf, " # Probe DRI device attributes\n");
virBufferAddLit(&buf, " \"/dev/dri/\" r,\n");
virBufferAddLit(&buf, " \"/sys/devices/**/{uevent,vendor,device,subsystem_vendor,subsystem_device}\" r,\n");
virBufferAddLit(&buf, " \"/sys/devices/**/{uevent,vendor,device,subsystem_vendor,subsystem_device,config,revision}\" r,\n");
virBufferAddLit(&buf, " # dri libs will trigger that, but t is not requited and DAC would deny it anyway\n");
virBufferAddLit(&buf, " deny \"/var/lib/libvirt/.cache/\" w,\n");
}