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qemu: virtiofs: do not crash if cgroups are missing

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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>
This commit is contained in:
Ján Tomko 2024-03-05 14:55:26 +01:00
parent 0bb33164d0
commit a9da009219
1 changed files with 3 additions and 0 deletions
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src/qemu/qemu_virtiofs.c
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@ -353,6 +353,9 @@ qemuVirtioFSSetupCgroup(virDomainObj *vm,
pid_t pid = -1; pid_t pid = -1;
int rc; int rc;
if (!cgroup)
return 0;
if (!(pidfile = qemuVirtioFSCreatePidFilename(vm, fs->info.alias))) if (!(pidfile = qemuVirtioFSCreatePidFilename(vm, fs->info.alias)))
return -1; return -1;