[PATCH v1 0/2] DAC,SELinux: do not remember/recall labels for

Daniel Henrique Barboza danielhb413 at gmail.com
Mon Jan 27 18:23:19 UTC 2020

Libvirt is trying to do multiple open() calls in /dev/vfio
files, which results in errors inside the security drivers
and QEMU returning error 125 when attempting to hotplug
a hostdev which belongs to the same IOMMU group as an
existing domain hostdev. See patch 2 commit msg for
more details.

I found this problem when testing a PCI multifunction
hotplug implementation. Since this is a problem that
can happen in other currently supported scenarios,
I decided it was worth sending the fix right away.

Michal, I'm CCing you because I mentioned commit 4e95cdcbb3
("security: Don't remember labels for TPM") in patch 2,
which seems to fix a very similar problem. Figured you
might want to take a look.

Daniel Henrique Barboza (2):
  security: Allow 'remember' to be set for HostdevLabelHelper
  security: do not remember/recall labels for VFIO

 src/security/security_dac.c     | 20 ++++++++++++--------
 src/security/security_selinux.c | 20 ++++++++++++--------
 2 files changed, 24 insertions(+), 16 deletions(-)


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