[libvirt] [PATCH 1/3] qemu: process: Don't use qemuBlockJobStartupFinalize in qemuProcessHandleBlockJob

The block job event handler qemuProcessHandleBlockJob looks at the block job data to see whether the job requires synchronous handling. Since the block job event may arrive before we continue the job handling (if the job has no data to copy) we could hit the state when the job is still set as QEMU_BLOCKJOB_STATE_NEW (as we move it to the QEMU_BLOCKJOB_STATE_RUNNING state only after returning from monitor). If the event handler uses qemuBlockJobStartupFinalize it would unregister and free the job. Thankfully this is not a big problem for legacy blockjobs as we don't need much data for them but since we'd re-instantiate the job data structure we'd report wrong job type for active commit as qemu reports it as a regular commit job. Fix it by not using qemuBlockJobStartupFinalize function in qemuProcessHandleBlockJob as it is not starting the job anyways. https://bugzilla.redhat.com/show_bug.cgi?id=1721375 Signed-off-by: Peter Krempa <pkrempa(a)redhat.com&gt; --- src/qemu/qemu_process.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index f3ffd76259..75205bc121 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -936,7 +936,7 @@ qemuProcessHandleBlockJob(qemuMonitorPtr mon ATTRIBUTE_UNUSED, virQEMUDriverPtr driver = opaque; struct qemuProcessEvent *processEvent = NULL; virDomainDiskDefPtr disk; - qemuBlockJobDataPtr job = NULL; + VIR_AUTOUNREF(qemuBlockJobDataPtr) job = NULL; char *data = NULL; virObjectLock(vm); @@ -983,7 +983,6 @@ qemuProcessHandleBlockJob(qemuMonitorPtr mon ATTRIBUTE_UNUSED, } cleanup: - qemuBlockJobStartupFinalize(vm, job); qemuProcessEventFree(processEvent); virObjectUnlock(vm); return 0; -- 2.21.0