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[src/trunk]: src/sys/arch/xen/xen if grant fails also revoke the grants for p...
details: https://anonhg.NetBSD.org/src/rev/bde03c4e3f13
branches: trunk
changeset: 1009156:bde03c4e3f13
user: jdolecek <jdolecek%NetBSD.org@localhost>
date: Tue Apr 14 08:21:59 2020 +0000
description:
if grant fails also revoke the grants for previous segments, fixes
grant leak on grant error
diffstat:
sys/arch/xen/xen/xbd_xenbus.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diffs (31 lines):
diff -r d60fa8ba05b8 -r bde03c4e3f13 sys/arch/xen/xen/xbd_xenbus.c
--- a/sys/arch/xen/xen/xbd_xenbus.c Tue Apr 14 08:06:53 2020 +0000
+++ b/sys/arch/xen/xen/xbd_xenbus.c Tue Apr 14 08:21:59 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: xbd_xenbus.c,v 1.107 2020/04/13 20:09:13 jdolecek Exp $ */
+/* $NetBSD: xbd_xenbus.c,v 1.108 2020/04/14 08:21:59 jdolecek Exp $ */
/*
* Copyright (c) 2006 Manuel Bouyer.
@@ -50,7 +50,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xbd_xenbus.c,v 1.107 2020/04/13 20:09:13 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xbd_xenbus.c,v 1.108 2020/04/14 08:21:59 jdolecek Exp $");
#include "opt_xen.h"
@@ -1049,6 +1049,12 @@
&xbdreq->req_gntref[seg]))) {
printf("%s: %s: xengnt_grant_access failed",
device_xname(sc->sc_dksc.sc_dev), __func__);
+ if (seg > 0) {
+ for (; --seg >= 0; ) {
+ xengnt_revoke_access(
+ xbdreq->req_gntref[seg]);
+ }
+ }
bus_dmamap_unload(sc->sc_xbusd->xbusd_dmat,
xbdreq->req_dmamap);
SLIST_INSERT_HEAD(&sc->sc_xbdreq_head, xbdreq,
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