[libvirt] [PATCH 5/8] qemu: don't hold monitor job for fsinfo

[Jonathon Jongsma]

We have to assume that the guest agent may be malicious so we don't want
to allow any agent queries to block any other libvirt API. By holding a
monitor job while we're querying the agent, we open ourselves up to a
DoS.

This function does not issue any monitor commands, so we can drop the
monitor job and only hold an agent job.

Signed-off-by: Jonathon Jongsma <jjongsma at redhat.com>
---
 src/qemu/qemu_driver.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 10fad8d75d..e1a91c5049 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -21623,9 +21623,8 @@ qemuDomainGetFSInfo(virDomainPtr dom,
     if (virDomainGetFSInfoEnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;
 
-    if (qemuDomainObjBeginJobWithAgent(driver, vm,
-                                       QEMU_JOB_QUERY,
-                                       QEMU_AGENT_JOB_QUERY) < 0)
+    if (qemuDomainObjBeginAgentJob(driver, vm,
+                                   QEMU_AGENT_JOB_QUERY) < 0)
         goto cleanup;
 
     if (virDomainObjCheckActive(vm) < 0)
@@ -21639,7 +21638,7 @@ qemuDomainGetFSInfo(virDomainPtr dom,
     qemuDomainObjExitAgent(vm, agent);
 
  endjob:
-    qemuDomainObjEndJobWithAgent(driver, vm);
+    qemuDomainObjEndAgentJob(vm);
 
  cleanup:
     virDomainObjEndAPI(&vm);
-- 
2.21.0