apparmor: qemu access to @{PROC}/*/auxv for hw_cap

On some architectures (ppc, s390x, sparc, arm) qemu will read auxv
to detect hardware capabilities via qemu_getauxval.

Allow that access read-only for the entry owned by the current
qemu process.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Acked-by: Jamie Strandboge <jamie@canonical.com>

diff --git a/src/security/apparmor/libvirt-qemu b/src/security/apparmor/libvirt-qemu
index b132cf02262606fb0719096ba2b994631a924a53..ae3db68f82460a8b3f7ad84f9c16ea22202be9b6 100644 (file)
--- a/src/security/apparmor/libvirt-qemu
+++ b/src/security/apparmor/libvirt-qemu
@@ -33,6 +33,8 @@
   owner @{PROC}/@{pid}/task/@{tid}/comm rw,
   @{PROC}/sys/kernel/cap_last_cap r,
   @{PROC}/sys/vm/overcommit_memory r,
+  # detect hardware capabilities via qemu_getauxval
+  owner @{PROC}/*/auxv r,
 
   # For hostdev access. The actual devices will be added dynamically
   /sys/bus/usb/devices/ r,