Re: [libvirt] [PATCH 1/4] virt-aa-helper: fix paths for usb hostdevs

If users only specified vendor&product (the common case) then parsing the xml via virDomainHostdevSubsysUSBDefParseXML would only set these. Bus and Device would much later be added when the devices are prepared to be added. Due to that a hot-add of a usb hostdev works as the device is prepared and virt-aa-helper processes the new internal xml. But on an initial guest start at the time virt-aa-helper renders the apparmor rules the bus/device id's are not set yet: p ctl->def->hostdevs[0]->source.subsys.u.usb $12 = {autoAddress = false, bus = 0, device = 0, vendor = 1921, product = 21888} That causes rules to be wrong: "/dev/bus/usb/000/000" rw, The fix calls virHostdevFindUSBDevice after reading the XML from irt-aa-helper to only add apparmor rules for devices that could be found and now are fully known to be able to write the rule correctly. It uncondtionally sets virHostdevFindUSBDevice mandatory attribute as adding an apparmor rule for a device not found makes no sense no matter what startup policy it has set. Signed-off-by: Christian Ehrhardt <christian.ehrhardt(a)canonical.com&gt; --- src/security/virt-aa-helper.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/security/virt-aa-helper.c b/src/security/virt-aa-helper.c index 7944dc1..d1518ea 100644 --- a/src/security/virt-aa-helper.c +++ b/src/security/virt-aa-helper.c @@ -55,6 +55,7 @@ #include "virrandom.h" #include "virstring.h" #include "virgettext.h" +#include "virhostdev.h" #include "storage/storage_source.h" @@ -1069,6 +1070,9 @@ get_files(vahControl * ctl) if (usb == NULL) continue; + if (virHostdevFindUSBDevice(dev, true, &usb) < 0) + continue; +