diff -Nru libvirt-5.0.0/debian/changelog libvirt-5.0.0/debian/changelog
--- libvirt-5.0.0/debian/changelog	2021-02-26 11:57:36.000000000 +0200
+++ libvirt-5.0.0/debian/changelog	2021-11-19 14:30:04.000000000 +0200
@@ -1,3 +1,10 @@
+libvirt (5.0.0-1ubuntu2.6~cloud2.2) bionic-stein; urgency=medium
+
+  * d/p/u/lp-1927519-virt-aa-helper-Purge-profile-if-corrupted.patch:
+    avoid issues due to corrupted apparmor profiles (LP: #1927519)
+
+ -- Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>  Fri, 19 Nov 2021 14:30:04 +0200
+
 libvirt (5.0.0-1ubuntu2.6~cloud2.1) bionic-stein; urgency=medium
 
   * d/p/lp1915811-*: Fix NUMA topology population for machines with high number
diff -Nru libvirt-5.0.0/debian/patches/series libvirt-5.0.0/debian/patches/series
--- libvirt-5.0.0/debian/patches/series	2021-02-26 11:57:36.000000000 +0200
+++ libvirt-5.0.0/debian/patches/series	2021-11-19 14:25:30.000000000 +0200
@@ -69,3 +69,4 @@
 ubuntu-aa/lp-1847361-load-versioned-module.patch
 ubuntu/lp1915811-01-virnuma-Don-t-work-around-numa_node_to_cpus.patch
 ubuntu/lp1915811-02-virnuma-Use-numa_nodes_ptr-when-checking-av.patch
+ubuntu/lp-1927519-virt-aa-helper-Purge-profile-if-corrupted.patch
diff -Nru libvirt-5.0.0/debian/patches/ubuntu/lp-1927519-virt-aa-helper-Purge-profile-if-corrupted.patch libvirt-5.0.0/debian/patches/ubuntu/lp-1927519-virt-aa-helper-Purge-profile-if-corrupted.patch
--- libvirt-5.0.0/debian/patches/ubuntu/lp-1927519-virt-aa-helper-Purge-profile-if-corrupted.patch	1970-01-01 02:00:00.000000000 +0200
+++ libvirt-5.0.0/debian/patches/ubuntu/lp-1927519-virt-aa-helper-Purge-profile-if-corrupted.patch	2021-11-19 14:29:50.000000000 +0200
@@ -0,0 +1,71 @@
+From 4ab33415db31d0e77015bb852cab4a08dd0efd40 Mon Sep 17 00:00:00 2001
+From: Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
+Origin: Upstream, https://gitlab.com/libvirt/libvirt/-/commit/4ab33415db31d0e77015bb852cab4a08dd0efd40
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1927519
+Date: Tue, 2 Nov 2021 16:04:45 +0200
+Subject: [PATCH] virt-aa-helper: Purge profile if corrupted
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This commit aims to address the bug reported in [1] and [2].
+If the profile is corrupted (0-size) the VM cannot be launched.
+To overcome this, check if the profile exists and if it has 0 size
+remove it.
+
+[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890084
+[2] https://bugs.launchpad.net/bugs/1927519
+
+Signed-off-by: Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
+Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
+Reviewed-by: Ján Tomko <jtomko@redhat.com>
+
+Origin: upstream, https://libvirt.org/git/?p=libvirt.git;a=commit;h=4ab33415db
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1927519
+---
+ src/security/virt-aa-helper.c | 20 +++++++++++++++++++-
+ 1 file changed, 19 insertions(+), 1 deletion(-)
+
+--- a/src/security/virt-aa-helper.c
++++ b/src/security/virt-aa-helper.c
+@@ -1415,6 +1415,8 @@ main(int argc, char **argv)
+     int rc = -1;
+     char *profile = NULL;
+     char *include_file = NULL;
++    off_t size;
++    bool purged = 0;
+ 
+     if (virGettextInitialize() < 0 ||
+         virThreadInitialize() < 0 ||
+@@ -1469,6 +1471,22 @@ main(int argc, char **argv)
+         if (ctl->cmd == 'c' && virFileExists(profile))
+             vah_error(ctl, 1, _("profile exists"));
+ 
++        /*
++         * Rare cases can leave corrupted empty files behind breaking
++         * the guest. An empty file is never correct as virt-aa-helper
++         * would at least add the basic rules, therefore clean this up
++         * for a proper refresh.
++         */
++        if (virFileExists(profile)) {
++                size = virFileLength(profile, -1);
++                if (size == 0) {
++                        vah_warning(_("Profile of 0 size detected, will attempt to remove it"));
++                        if ((rc = parserRemove(ctl->uuid) != 0))
++                                vah_error(ctl, 1, _("could not remove profile"));
++                        unlink(profile);
++                        purged = true;
++                }
++        }
+         if (ctl->append && ctl->newfile) {
+             if (vah_add_file(&buf, ctl->newfile, "rwk") != 0)
+                 goto cleanup;
+@@ -1517,7 +1535,7 @@ main(int argc, char **argv)
+ 
+ 
+         /* create the profile from TEMPLATE */
+-        if (ctl->cmd == 'c') {
++        if (ctl->cmd == 'c' || purged) {
+             char *tmp = NULL;
+             if (virAsprintfQuiet(&tmp, "  #include <libvirt/%s.files>\n",
+                                  ctl->uuid) == -1) {