[libvirt] [PATCH 4/4] admin: Use the newly introduced close callback handling helpers
Use the newly introduced close callback helpers to make the code look just a
bit cleaner and more importantly, to fix the following memleak regarding a
dangling virAdmConnect object reference caused by assigning NULL to the close
callback data once the catch-disconnect routine used the callback followed
by a comparison of NULL to the originally defined close callback (which at that
moment had already been NULL'd by remoteAdminClientCloseFunc) in
virAdmConnectCloseCallbackUnregister.
717 (88 direct, 629 indirect) bytes in 1 blocks are definitely lost record
110 of 141
at 0x4C2A988: calloc (vg_replace_malloc.c:711)
by 0x530696F: virAllocVar (viralloc.c:560)
by 0x53689E6: virObjectNew (virobject.c:193)
by 0x5368B5E: virObjectLockableNew (virobject.c:219)
by 0x4E3E7EE: virAdmConnectNew (datatypes.c:900)
by 0x4E398BB: virAdmConnectOpen (libvirt-admin.c:220)
by 0x10D3E3: vshAdmConnect (virt-admin.c:161)
by 0x10D624: vshAdmReconnect (virt-admin.c:215)
by 0x10DB0A: cmdConnect (virt-admin.c:353)
by 0x11288F: vshCommandRun (vsh.c:1313)
by 0x10FDB6: main (virt-admin.c:1439)
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1357358
Signed-off-by: Erik Skultety <eskultet(a)redhat.com>
---
src/admin/admin_remote.c | 6 +-----
src/datatypes.c | 5 +----
src/libvirt-admin.c | 18 +-----------------
3 files changed, 3 insertions(+), 26 deletions(-)
diff --git a/src/admin/admin_remote.c b/src/admin/admin_remote.c
index 10a3b18..f37ff5e 100644
--- a/src/admin/admin_remote.c
+++ b/src/admin/admin_remote.c
@@ -144,11 +144,7 @@ remoteAdminClientCloseFunc(virNetClientPtr client ATTRIBUTE_UNUSED,
VIR_DEBUG("Triggering connection close callback %p reason=%d,
opaque=%p",
cbdata->callback, reason, cbdata->opaque);
cbdata->callback(cbdata->conn, reason, cbdata->opaque);
-
- if (cbdata->freeCallback)
- cbdata->freeCallback(cbdata->opaque);
- cbdata->callback = NULL;
- cbdata->freeCallback = NULL;
+ virAdmConnectCloseCallbackDataReset(cbdata);
}
virObjectUnlock(cbdata);
}
diff --git a/src/datatypes.c b/src/datatypes.c
index 24e4f77..c8a46b0 100644
--- a/src/datatypes.c
+++ b/src/datatypes.c
@@ -928,10 +928,7 @@ virAdmConnectCloseCallbackDataDispose(void *obj)
virAdmConnectCloseCallbackDataPtr cb_data = obj;
virObjectLock(cb_data);
-
- if (cb_data->freeCallback)
- cb_data->freeCallback(cb_data->opaque);
-
+ virAdmConnectCloseCallbackDataReset(cb_data);
virObjectUnlock(cb_data);
}
diff --git a/src/libvirt-admin.c b/src/libvirt-admin.c
index 1b5fd44..8877e49 100644
--- a/src/libvirt-admin.c
+++ b/src/libvirt-admin.c
@@ -513,29 +513,13 @@ int virAdmConnectUnregisterCloseCallback(virAdmConnectPtr conn,
virResetLastError();
virCheckAdmConnectReturn(conn, -1);
-
- virObjectLock(conn->closeCallback);
-
virCheckNonNullArgGoto(cb, error);
- if (conn->closeCallback->callback != cb) {
- virReportError(VIR_ERR_OPERATION_INVALID, "%s",
- _("A different callback was requested"));
+ if (virAdmConnectCloseCallbackDataUnregister(conn->closeCallback, cb) < 0)
goto error;
- }
-
- conn->closeCallback->callback = NULL;
- if (conn->closeCallback->freeCallback)
- conn->closeCallback->freeCallback(conn->closeCallback->opaque);
- conn->closeCallback->freeCallback = NULL;
-
- virObjectUnlock(conn->closeCallback);
- virObjectUnref(conn);
return 0;
-
error:
- virObjectUnlock(conn->closeCallback);
virDispatchError(NULL);
return -1;
}
--
2.5.5