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由 Stefan Hajnoczi 提交于
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: NStefan Hajnoczi <stefanha@redhat.com>
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