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net: Reject non-netdevs in qmp_netdev_del()

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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 <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2012-10-24 14:34:12 +02:00
parent f0e3ac7034
commit 645c9496f7
1 changed files with 8 additions and 1 deletions
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9
net.c
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@ -827,6 +827,7 @@ exit_err:
void qmp_netdev_del(const char *id, Error **errp) void qmp_netdev_del(const char *id, Error **errp)
{ {
NetClientState *nc; NetClientState *nc;
QemuOpts *opts;
nc = qemu_find_netdev(id); nc = qemu_find_netdev(id);
if (!nc) { if (!nc) {
@ -834,8 +835,14 @@ void qmp_netdev_del(const char *id, Error **errp)
return; 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_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) void print_net_client(Monitor *mon, NetClientState *nc)