From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 9 Nov 2015 12:44:29 +0000 (+0100)
Subject: qemu: hotplug: Reject VFIO hotplug if setting RLIMIT_MEMLOCK fails
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=baf55e1fa41a6aa77a5373891d70947ef24acadd;p=libvirt.git

qemu: hotplug: Reject VFIO hotplug if setting RLIMIT_MEMLOCK fails

Check the return value of virCommandSetMaxMemLock when hotplugging VFIO
PCI hostdevs and reject the hotplug if the memory limit can't be set.
---

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index b02e9050f2..13a4b300fd 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1279,7 +1279,10 @@ qemuDomainAttachHostPCIDevice(virQEMUDriverPtr driver,
         }
 
         /* setup memory locking limits, that are necessary for VFIO */
-        virProcessSetMaxMemLock(vm->pid, qemuDomainGetMlockLimitBytes(vm->def));
+        if (virProcessSetMaxMemLock(vm->pid,
+                                    qemuDomainGetMlockLimitBytes(vm->def)) < 0)
+            goto error;
+
         break;
 
     default: