https://bugzilla.redhat.com/show_bug.cgi?id=1487322 In ace45e67abbd I've tried to fix a problem that we get the reply to a D-Bus call while we were sleeping. In that case the callback was never set. So I've changed the code that the callback is called directly in this case. However, I hadn't realized that since callback is called out of order it lock the virNetDaemon. Exactly the very same virNetDaemon that we are dealing with right now and have it locked already (in virNetDaemonAddShutdownInhibition()) Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/rpc/virnetdaemon.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/src/rpc/virnetdaemon.c b/src/rpc/virnetdaemon.c index 00247cfc3..e3b9390af 100644 --- a/src/rpc/virnetdaemon.c +++ b/src/rpc/virnetdaemon.c @@ -439,14 +439,12 @@ virNetDaemonAutoShutdown(virNetDaemonPtr dmn, #if defined(WITH_DBUS) && defined(DBUS_TYPE_UNIX_FD) static void -virNetDaemonGotInhibitReply(DBusPendingCall *pending, - void *opaque) +virNetDaemonGotInhibitReplyLocked(DBusPendingCall *pending, + virNetDaemonPtr dmn) { - virNetDaemonPtr dmn = opaque; DBusMessage *reply; int fd; - virObjectLock(dmn); dmn->autoShutdownCallingInhibit = false; VIR_DEBUG("dmn=%p", dmn); @@ -470,11 +468,22 @@ virNetDaemonGotInhibitReply(DBusPendingCall *pending, virDBusMessageUnref(reply); cleanup: - virObjectUnlock(dmn); dbus_pending_call_unref(pending); } +static void +virNetDaemonGotInhibitReply(DBusPendingCall *pending, + void *opaque) +{ + virNetDaemonPtr dmn = opaque; + + virObjectLock(dmn); + virNetDaemonGotInhibitReplyLocked(pending, dmn); + virObjectUnlock(dmn); +} + + /* As per: http://www.freedesktop.org/wiki/Software/systemd/inhibit */ static void virNetDaemonCallInhibit(virNetDaemonPtr dmn, @@ -516,7 +525,7 @@ virNetDaemonCallInhibit(virNetDaemonPtr dmn, 25 * 1000) && pendingReply) { if (dbus_pending_call_get_completed(pendingReply)) { - virNetDaemonGotInhibitReply(pendingReply, dmn); + virNetDaemonGotInhibitReplyLocked(pendingReply, dmn); } else { dbus_pending_call_set_notify(pendingReply, virNetDaemonGotInhibitReply, -- 2.13.5