Re: [libvirt] [PATCH] util: Prevent libvirtd crash

* src/util/virnetdevopenvswitch.c (virNetDevOpenvswitchAddPort): avoid libvirtd crash due to derefing a NULL virtVlan->tag. RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=852383 Signed-off-by: Alex Jia <ajia(a)redhat.com&gt; --- src/util/virnetdevopenvswitch.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/src/util/virnetdevopenvswitch.c b/src/util/virnetdevopenvswitch.c index 601d79e..7d38ff8 100644 --- a/src/util/virnetdevopenvswitch.c +++ b/src/util/virnetdevopenvswitch.c @@ -100,7 +100,8 @@ int virNetDevOpenvswitchAddPort(const char *brname, const char *ifname, virBufferAsprintf(buf, "%d", virtVlan->tag[i]); } } else { - virBufferAsprintf(buf, "tag=%d", virtVlan->tag[0]); + if (virtVlan->nTags) + virBufferAsprintf(buf, "tag=%d", virtVlan->tag[0]);