From: Ján Tomko <jtomko@redhat.com>
Date: Tue, 5 Mar 2024 13:55:26 +0000 (+0100)
Subject: qemu: virtiofs: do not crash if cgroups are missing
X-Git-Tag: v10.2.0-rc1~40
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a9da0092198ba2f278cea370f8251f2e29f57c7d;p=thirdparty%2Flibvirt.git

qemu: virtiofs: do not crash if cgroups are missing

On domain startup, qemuSetupCgroupForExtDevices checks
if a cgroup controller is present and skips the setup if not.

Add a similar check to qemuVirtioFSSetupCgroup to prevent
crashing when hotplugging a virtiofs filesystem.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
---

diff --git a/src/qemu/qemu_virtiofs.c b/src/qemu/qemu_virtiofs.c
index d539d0a192..15dea3bb57 100644
--- a/src/qemu/qemu_virtiofs.c
+++ b/src/qemu/qemu_virtiofs.c
@@ -353,6 +353,9 @@ qemuVirtioFSSetupCgroup(virDomainObj *vm,
     pid_t pid = -1;
     int rc;
 
+    if (!cgroup)
+        return 0;
+
     if (!(pidfile = qemuVirtioFSCreatePidFilename(vm, fs->info.alias)))
         return -1;