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'fence_fd' needs to be validated always before being referenced And the passing condition should include '== 0' as 0 is a valid value for the file descriptor. Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Cc: Philippe Mathieu-Daudé <philmd@linaro.org> Cc: Daniel P. Berrangé <berrange@redhat.com> Cc: Vivek Kasireddy <vivek.kasireddy@intel.com> Signed-off-by: Dongwon Kim <dongwon.kim@intel.com> Message-Id: <20240508175403.3399895-2-dongwon.kim@intel.com>