From patchwork Thu Nov 1 11:10:17 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3/4] net: Reject non-netdevs in qmp_netdev_del() From: Stefan Hajnoczi X-Patchwork-Id: 196163 Message-Id: <1351768218-21466-4-git-send-email-stefanha@redhat.com> To: Anthony Liguori Cc: qemu-devel@nongnu.org, Stefan Hajnoczi Date: Thu, 1 Nov 2012 12:10:17 +0100 The netdev_del command crashes when given a -net device, because it calls qemu_opts_del(NULL). Check that this is a -netdev before attempting to delete it and the QemuOpts. Note the subtle change from qemu_find_opts_err("netdev", errp) to qemu_find_opts_err("netdev", NULL). Since "netdev" is a built in options group and we don't check for NULL return anyway, there's no use in passing errp here. Signed-off-by: Stefan Hajnoczi --- net.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net.c b/net.c index ae4bc0d..e8ae13e 100644 --- a/net.c +++ b/net.c @@ -827,6 +827,7 @@ exit_err: void qmp_netdev_del(const char *id, Error **errp) { NetClientState *nc; + QemuOpts *opts; nc = qemu_find_netdev(id); if (!nc) { @@ -834,8 +835,14 @@ void qmp_netdev_del(const char *id, Error **errp) return; } + opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); + if (!opts) { + error_setg(errp, "Device '%s' is not a netdev", id); + return; + } + qemu_del_net_client(nc); - qemu_opts_del(qemu_opts_find(qemu_find_opts_err("netdev", errp), id)); + qemu_opts_del(opts); } void print_net_client(Monitor *mon, NetClientState *nc)